As filed with the Securities and Exchange Commission on September 28, 2006 Registration No. 333-________ SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM N-14 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 [X] [ ] Pre-Effective Amendment No. __ [ ] Post-Effective Amendment No. __ PRINCIPAL INVESTORS FUND, INC. (Exact name of Registrant as specified in charter) 680 8th Street, Des Moines, Iowa 50392-0200 (Address of Registrant's Principal Executive Offices) 800-247-4123 (Registrant's Telephone Number, Including Area Code) Michael D. Roughton Counsel, Principal Investors Fund, Inc. 711 High Street, Suite 405 West Des Moines, Iowa 50392-0200 (Name and Address of Agent for Service) Copies of all communications to: John W. Blouch Dykema Gossett PLLC 1300 I Street, N.W. Washington, D.C. 20005-3353 202-906-8714; 202-906-8669 (Fax) Approximate date of proposed public offering: As soon as practicable after this Registration Statement becomes effective. Title of Securities Being Registered: Class A and Class B common stock, par value $.01 per share. No filing fee is due because an indefinite number of shares have been registered in reliance on Section 24(f) under the Investment Company Act of 1940, as amended. It is proposed that this filing will become effective on October 28, 2006, pursuant to Rule 488. PRINCIPAL INVESTORS FUND, INC. 680 8th Street Des Moines, Iowa 50392-0200 October ___, 2006 Dear Shareholder: A Special Meeting of Shareholders of Principal Investors Fund, Inc. ("PIF") will be held at 680 8th Street, Des Moines, Iowa 50392-0200, on December 15, 2006 at ______ a.m., Central Time. At the Meeting, shareholders of each Acquired Fund of PIF listed below (the "Acquired Funds") will be asked to consider and approve a proposed Plan of Reorganization (the "Plan") pursuant to which the Acquired Fund will be combined into the corresponding Acquiring Fund of PIF listed below (the "Acquiring Funds"): Acquired Funds Acquiring Funds -------------- --------------- Equity Income Fund Equity Income Fund I Tax-Exempt Bond Fund Tax-Exempt Bond Fund I Under the Plan: (i) each Acquiring Fund will acquire all the assets, subject to all the liabilities, of its corresponding Acquired Fund in exchange for shares of the Acquiring Fund; (ii) the Acquiring Fund shares will be distributed to the shareholders of the Acquired Fund; and (iii) the Acquired Fund will liquidate and terminate (each, a "Reorganization"). As a result of the Reorganizations, each shareholder of an Acquired Fund will become a shareholder of its corresponding Acquiring Fund. The total value of all shares of each Acquiring Fund issued in the Reorganization will equal the total value of the net assets of its corresponding Acquired Fund. The number of full and fractional shares of an Acquiring Fund received by a shareholder of an Acquired Fund will be equal in value to the value of that shareholder's shares of the Acquired Fund as of the close of regularly scheduled trading on the New York Stock Exchange on the closing date of the Reorganization. Holders of Class A and Class B shares of an Acquired Fund will receive, respectively, Class A and Class B shares of the corresponding Acquiring Fund. If approved by shareholders of the Acquired Funds, the Reorganizations are expected to occur immediately after the close of regularly scheduled trading on the New York Stock Exchange on January 12, 2007. All share classes of each Acquired Fund will vote in the aggregate and not by class with respect to the proposed Reorganization. As you may know, on July 25, 2006, Principal Financial Group, Inc. and its subsidiary, Principal Management Corporation ("PMC"), the investment advisor to the Acquired and Acquiring Funds, entered into an agreement with Washington Mutual, Inc. to acquire all the outstanding stock of its subsidiary, WM Advisors, Inc. ("WMA"), and WMA's two subsidiaries, WM Funds Distributor, Inc. and WM Shareholder Services, Inc. (the "Transaction"). The Reorganizations arise out of the Transaction, which contemplates combining the series of WM Trust I, WM Trust II and WM Strategic Asset Management Portfolios, LLC, each of which is advised by WMA, into PIF. This includes the reorganization of (i) the WM Equity Income Fund into the Equity Income Fund I, a newly-created series of PIF that was set up as one of the Acquiring Funds involved in the Reorganization described in the enclosed Proxy Statement/Prospectus to acquire the assets of both the WM Equity Income Fund and the Equity Income Fund of PIF and (ii) the WM Tax-Exempt Bond Fund into the Tax-Exempt Bond Fund I, the other newly-created Acquiring Fund involved in the Reorganization described in the enclosed Proxy Statement/Prospectus (collectively, the "WM Fund Reorganizations") (the WM Equity Income Fund and the WM Tax-Exempt Bond Fund are referred to collectively as the "WM Acquired Funds" and individually as a "WM Acquired Fund"). The closing of the Transaction is expected to occur in the fourth quarter of this calendar year, subject to certain regulatory and other approvals. The reorganization of the Equity Income Fund into the Equity Income Fund I will not be effected unless the Equity Income Fund I first acquires substantially all of the assets of the WM Equity Income Fund. Likewise, the reorganization of the Tax-Exempt Bond Fund into the Tax-Exempt Bond Fund I will not be effected unless the Tax-Exempt Bond Fund I first acquires substantially all the assets of the WM Tax-Exempt Bond Fund. The Board of Directors of PIF has unanimously approved each of the Reorganizations and concluded that each Reorganization is in the best interests of each Acquired Fund and that the interests of existing shareholders of each Acquired Fund will not be diluted as a result of the Reorganizations. Each Acquiring Fund is a new fund, which has investment objectives and strategies that are identical to those of its corresponding WM Acquired Fund and substantially similar to those of its corresponding Acquired Fund. Accordingly, after the Reorganizations, it should be reasonable for shareholders to have the same investment expectations. Shareholders in each Acquired Fund may benefit from the Acquiring Fund's larger asset base resulting from the addition of the WM Acquired Fund's assets. As a result of the Reorganizations, each Acquiring Fund may have improved prospects for growth, may operate more efficiently and may have greater potential for attendant reductions in overall expenses. The value of your investment will not be affected by the Reorganizations. Furthermore, in the opinion of legal counsel, no gain or loss will be recognized by any shareholder for federal income tax purposes as a result of the Reorganizations. Finally, none of the Acquired Funds, the Acquiring Funds or their shareholders will incur any fees or expenses in connection with the Reorganizations (other than trading costs associated with disposing of any portfolio securities that would not be compatible with the investment objectives and strategies of an Acquiring Fund and reinvesting the proceeds in securities that would be compatible). * * * Enclosed you will find a Notice of Special Meeting of Shareholders, a Proxy Statement/ Prospectus, and a proxy ballot for shares of each Acquired Fund you owned as of October 6, 2006, the record date for the Meeting. The Proxy Statement/Prospectus provides background information and describes in detail the matters to be voted on at the Meeting. The Board of Directors of PIF has unanimously voted in favor of each proposed Reorganization and recommends that you vote FOR the Proposal that pertains to your Acquired Fund. In order for shares to be voted at the Meeting, we urge you to read the Proxy Statement/ Prospectus and then complete and mail your proxy ballot(s) in the enclosed postage-paid envelope, allowing sufficient time for its receipt by _____________, 2006. To vote by touch-tone telephone or via the Internet, follow the instructions on the proxy ballot. We appreciate your taking the time to respond to this important matter. Your vote is important. If you have any questions regarding the Reorganizations, please call our shareholder services department toll free at 1-800-247-4123. Sincerely, /s/ RALPH C. EUCHER Ralph C. Eucher President and Chief Executive Officer PRINCIPAL INVESTORS FUND, INC. 680 8th Street Des Moines, Iowa 50392-0200 NOTICE OF SPECIAL MEETING OF SHAREHOLDERS To the Shareholders of the Equity Income Fund and Tax-Exempt Bond Fund: Notice is hereby given that a Special Meeting of Shareholders (the "Meeting") of the Equity Income Fund and Tax-Exempt Bond Fund, each a separate series of Principal Investors Fund, Inc. ("PIF"), will be held at 680 8th Street, Des Moines, Iowa 50392-0200, on December 15, 2006 at _____ a.m., Central Time. A Proxy Statement/Prospectus providing information about the following proposals to be voted on at the Meeting is included with this notice. The Meeting is being held to consider and vote on the following proposals as well as any other business that may properly come before the Meeting or any adjournment thereof: Proposal 1 Approval of a Plan of Reorganization providing for the reorganization of the Equity Income Fund into the Equity Income Fund I. (Only shareholders of the Equity Income Fund will vote on the Proposal) Proposal 2 Approval of a Plan of Reorganization providing for the reorganization of the Tax-Exempt Bond Fund into the Tax-Exempt Bond Fund I. (Only shareholders of the Tax-Exempt Bond Fund will vote on the Proposal) Any other business that may properly come before the Meeting. The Board of Directors of PIF recommends that shareholders of each Fund vote FOR the Proposal that pertains to their Fund. Approval of each Proposal will require the affirmative vote of the holders of at least a "Majority of the Outstanding Voting Securities" (as defined in the accompanying Proxy Statement/Prospectus) of the Acquired Fund. Each shareholder of record at the close of business on October 6, 2006 is entitled to receive notice of and to vote at the Meeting. Please read the attached Proxy Statement/Prospectus. By order of the Board of Directors /s/ RALPH C. EUCHER Ralph C. Eucher President and Chief Executive Officer October ___, 2006 Des Moines, Iowa PRINCIPAL INVESTORS FUND, INC. 680 8th Street Des Moines, Iowa 50392-0200 - -------------------------------------------------------------------------------- PROXY STATEMENT/PROSPECTUS SPECIAL MEETING OF SHAREHOLDERS TO BE HELD DECEMBER 15, 2006 RELATING TO THE REORGANIZATIONS OF: (1) THE EQUITY INCOME FUND INTO THE EQUITY INCOME FUND I; AND (2) THE TAX-EXEMPT BOND FUND INTO THE TAX-EXEMPT BOND FUND I This Proxy Statement/Prospectus is furnished in connection with the solicitation by the Board of Directors (the "Board" or "Directors") of Principal Investors Fund, Inc. ("PIF") of proxies to be used at a Special Meeting of Shareholders of PIF to be held at 680 8th Street, Des Moines, Iowa 50392-0200, on December 15, 2006, at _______ a.m., Central Time (the "Meeting"). At the Meeting, shareholders of each Acquired Fund of PIF listed below (the "Acquired Funds") will be asked to consider and approve a proposed Plan of Reorganization (the "Plan") providing for the reorganization of the Acquired Fund into the corresponding Acquiring Fund of PIF listed below (the "Acquiring Funds"). Acquired Funds Acquiring Funds Equity Income Fund Equity Income Fund I Tax-Exempt Bond Fund Tax-Exempt Bond Fund I Under the Plan: (i) each Acquiring Fund will acquire all the assets, subject to all the liabilities, of its corresponding Acquired Fund in exchange for shares of the Acquiring Fund; (ii) the Acquiring Fund shares will be distributed to the shareholders of the Acquired Fund; and (iii) the Acquired Fund will liquidate and terminate (each, a "Reorganization"). As a result of the Reorganizations, each shareholder of an Acquired Fund will become a shareholder of its corresponding Acquiring Fund. The total value of all shares of each Acquiring Fund issued in the Reorganization will equal the total value of the net assets of the corresponding Acquired Fund. The number of full and fractional shares of the Acquiring Fund received by a shareholder of the Acquired Fund will be equal in value to the value of that shareholder's shares of the Acquired Fund as of the close of regularly scheduled trading on the New York Stock Exchange on the closing date of the Reorganization. Holders of Class A and Class B shares of an Acquired Fund will receive, respectively, Class A and Class B shares of the corresponding Acquiring Fund. If approved by shareholders of an Acquired Fund, the Reorganization is expected to occur with respect to that Fund immediately after the close of regularly scheduled trading on the New York Stock Exchange on January 12, 2007 (the "Effective Time"). All share classes of each Acquired Fund will vote in the aggregate and not by class. The consummation of the reorganization of one Acquired Fund into its corresponding Acquiring Fund may occur regardless of whether the consummation of the other Reorganization occurs. As described more fully below, each Reorganization is contingent on the Acquiring Fund first acquiring substantially all of the assets of its corresponding WM Acquired Fund (as defined below). The terms and conditions of each Reorganization are more fully described below in this Proxy Statement/Prospectus and in each Plan of Reorganization, which is attached hereto as Appendix A. This Proxy Statement/Prospectus contains information shareholders should know before voting on a Reorganization. Please read it carefully and retain it for future reference. The Annual and Semi-Annual Reports to Shareholders of PIF contain additional information about the investments of the Acquired Funds, and the Annual Report contains discussions of the market conditions and investment strategies that significantly affected those Funds during their fiscal year ended October 31, 2005. Copies of these reports may be obtained at no charge by calling our shareholder services department toll free at 1-800-247-4123. A Statement of Additional Information dated October ___, 2006 (the "Statement of Additional Information") relating to this Proxy Statement/Prospectus has been filed with the Securities and Exchange Commission ("SEC") and is incorporated by reference into this Proxy Statement/Prospectus. The Prospectuses and Statement of Additional Information of PIF (the "PIF Prospectus" and the "PIF SAI," respectively), each dated March 1, 2006 and as supplemented, have been filed with the SEC and, insofar as they relate to the Acquired Funds, are incorporated by reference into this Proxy Statement/Prospectus. PIF's Semi-Annual Report to Shareholders for the six-month period ended April 30, 2006, which contains, among other information, financial highlights for the Acquired Funds, is incorporated by reference into this Proxy Statement/Prospectus. Copies of these documents may be obtained without charge by writing to PIF at the address noted above or by calling our shareholder services department toll free at 1-800-247-4123. You may also call our shareholder services department toll fee at 1-800-247-4123 if you have any questions regarding the Reorganization. PIF is subject to the informational requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940 (the "1940 Act") and files reports, proxy materials and other information with the SEC. Such reports, proxy materials and other information may be inspected and copied at the Public Reference Room of the SEC at 100 F Street, N.E., Room 1580, Washington, D.C. 20549 (information on the operation of the Public Reference Room may be obtained by calling the SEC at 1-202-551-5850). Such materials are also available on the SEC's EDGAR Database on its Internet site at www.sec.gov, and copies may be obtained, after paying a duplicating fee, by email request addressed to publicinfo@sec.gov or by writing to the SEC's Public Reference Room. The SEC has not approved or disapproved these securities or passed upon the accuracy or adequacy of this Proxy Statement/Prospectus. Any representation to the contrary is a criminal offense. The date of this Proxy Statement/Prospectus is October ___, 2006. TABLE OF CONTENTS Page Introduction .................................................................................... Overview of the Proposed Reorganizations............................................................... Proposal 1 Approval of a Plan of Reorganization providing for the reorganization of the Equity Income Fund into the Equity Income Fund I.................................... Proposal 2 Approval of a Plan of Reorganization providing for the reorganization of the Tax-Exempt Bond Fund into the Tax-Exempt Bond Fund I........................... Risks of Investing in the Funds......................................................................... Hedging and Other Strategic Transactions................................................................ Information About the Reorganizations................................................................... Plans of Reorganization............................................................. Reasons for the Reorganizations..................................................... Board Consideration of the Reorganizations.......................................... Description of Securities to Be Issued.............................................. Federal Income Tax Consequences..................................................... Capitalization .................................................................................... Additional Information About the Funds ................................................................. Differences Between the Share Classes of the Acquired and Acquiring Funds...... Shareholder Rights.................................................................. Dividends and Distributions......................................................... Purchases, Redemptions and Exchanges of Shares...................................... Frequent Purchases and Redemptions.................................................. Voting Information...................................................................................... Outstanding Shares and Share Ownership.................................................................. Financial Statements.................................................................................... Legal Matters........................................................................................... Other Information....................................................................................... Appendix A Forms of Plans of Reorganization................................................... A-1 Appendix B Debt Security Ratings.............................................................. B-1 Appendix C Certain Investment Strategies and Related Risks of the Acquiring Funds........... C-1 Appendix D Costs of Investing in the Acquiring Funds.......................................... D-1 Appendix E Additional Information About Fund Performance...................................... E-1 INTRODUCTION This Proxy Statement/Prospectus is furnished in connection with the solicitation by PIF's Board of Directors (the "Board" or "Directors") of proxies to be used at a Special Meeting of Shareholders of the Acquired Funds to be held at 680 8th Street, Des Moines, Iowa 50392-0200, on December 15, 2006, at _____ a.m., Central Time (the "Meeting"). The purpose of the Meeting is for shareholders of each Acquired Fund to consider and vote upon the proposed reorganization of the Acquired Fund into its corresponding Acquiring Fund, each a series of PIF. All shareholders of record of an Acquired Fund at the close of business on October 6, 2006 (the "Record Date") are entitled to one vote for each share (and fractional votes for fractional shares) of the Acquired Fund held on the Record Date. Principal Investors Fund, Inc. and the Acquired and Acquiring Funds. PIF is a Maryland corporation and an open-end management investment company registered with the SEC under the 1940 Act. PIF currently offers 55 separate series (the "PIF Funds"), including the Equity Income Fund and the Tax-Exempt Bond Fund. PIF has filed with the SEC a post-effective amendment to its registration statement on Form N-1A relating to the Equity Income Fund I and the Tax-Exempt Bond Fund I. These Acquiring Funds will commence operations at the Effective Time of the Reorganizations. The shares of the Acquired Funds are currently offered in two classes. The sponsor of PIF is Principal Life Insurance Company ("Principal Life"), the investment advisor to each of the Acquired Funds and the Acquiring Funds is Principal Management Corporation ("PMC") and the principal underwriter for PIF is Princor Financial Services Corporation ("Princor"). Principal Life, an insurance company organized in 1879 under the laws of Iowa, PMC and Princor are indirect, wholly-owned subsidiaries of Principal Financial Group, Inc. ("PFG"). Their address is the Principal Financial Group, Des Moines, Iowa 50392-0200. Pursuant to an investment advisory agreement with PIF with respect to each of the Acquired and Acquiring Funds, PMC provides investment advisory services and certain corporate administrative services to the Funds. As permitted by the investment advisory agreement, PMC has entered into sub-advisory agreements with sub-advisors with respect to each of the Acquired and Acquiring Funds as follows: Acquired Fund Sub-Advisor(s) Equity Income Fund Principal Global Investors LLC ("Principal Global") Tax-Exempt Bond Fund Principal Global and Nuveen Asset Management ("NAM") Acquiring Fund Sub-Advisor Equity Income Fund I Washington Mutual Advisors, Inc. ("WMA") Tax-Exempt Bond Fund I Van Kampen Asset Management ("Van Kampen") Each of PMC and the sub-advisors is registered with the SEC as an investment adviser under the Investment Advisers Act of 1940. Under its sub-advisory agreement, each sub-advisor assumes the obligations of PMC to provide investment advisory services for a specific Fund. Sub-advisors to the Acquired and Acquiring Funds are compensated by PMC, not by the Funds. Principal Global is an indirect wholly-owned subsidiary of PFG. NAM is a wholly-owned subsidiary of Nuveen Investments, Inc., which, together with its affiliates, had approximately $136 billion in assets under management as of December 31, 2005. NAM's address is 333 West Wacker Drive, Chicago, Illinois 60606. Van Kampen is an indirect wholly-owned subsidiary of Morgan Stanley, a publicly-held global financial services company and, together with its affiliates, had aggregate assets under management or supervision, as of June 30, 2006, of approximately $438 billion. Van Kampen's address is 1221 Avenue of the Americas, New York, New York 10020. WMA presently is an indirect wholly-owned subsidiary of Washington Mutual, Inc. ("WaMu"), a publicly-owned financial services company, and is located at 1201 Third Avenue, 22nd Floor, Seattle, Washington 98101. As described in greater detail below, PFG has entered into an agreement to acquire WMA. The WMA Acquisition. On July 25, 2006, PFG and its subsidiary, PMC, entered into an agreement with WaMu and New American Capital, Inc. ("NAC"), a wholly-owned subsidiary of WaMu and the immediate parent of WMA, to acquire all the outstanding stock of WMA and WMA's two subsidiaries, WM Funds Distributor, Inc. ("WMFD") and WM Shareholder Services, Inc. ("WMSS") (the "Transaction"). The Reorganizations described in this Proxy Statement/Prospectus arise out of the Transaction, which contemplates, among other things, the reorganization of (i) the WM Equity Income Fund, a series of WM Trust I that is advised by WMA, into the Equity Income Fund I and (ii) the WM Tax-Exempt Bond Fund, also a series of WM Trust I that is advised by WMA, into the Tax-Exempt Bond Fund I (collectively, the "WM Fund Reorganizations") (the WM Equity Income Fund and the WM Tax-Exempt Bond Fund are referred to collectively as the "WM Acquired Funds" and individually as a "WM Acquired Fund"). The closing of the Transaction is expected to occur in the fourth quarter of this calendar year, subject to certain regulatory and other approvals. After the Transaction, each of WMA, WMFD and WMSS will be an indirect wholly-owned subsidiary of PFG. The reorganization of the Equity Income Fund into the Equity Income Fund I will not be effected unless the Equity Income Fund I first acquires substantially all of the assets of the WM Equity Income Fund. Likewise, the reorganization of the Tax-Exempt Bond Fund into the Tax-Exempt Bond Fund I will not be effected unless the Tax-Exempt Bond Fund I first acquires substantially all the assets of the WM Tax-Exempt Bond Fund. In other words, completion of the Reorganization proposed for each Acquired Fund is contingent upon the consummation of the reorganization proposed for the corresponding WM Acquired Fund pursuant to the WM Fund Reorganization. The impact of the WM Fund Reorganizations on the Acquiring Funds is reflected in the information under the heading "Fees and Expenses of the Funds" under Proposals 1 and 2 as well as under the heading "Capitalization" below. OVERVIEW OF THE PROPOSED REORGANIZATIONS At its meeting held on September 11, 2006, the Board of Directors, including all the Directors who are not "interested persons" (as defined in the 1940 Act) of PIF (the "Independent Directors"), approved a Plan of Reorganization (the "Plan") providing for the reorganization of each of the Acquired Funds into the corresponding Acquiring Fund. The Reorganizations contemplate: (i) the transfer of all the assets, subject to all of the liabilities, of each Acquired Fund to its corresponding Acquiring Fund in exchange for shares of the Acquiring Fund; (ii) the distribution to shareholders of the Acquired Funds of the Acquiring Fund shares; and (ii) the liquidation and termination of the Acquired Funds. As a result of each Reorganization, each shareholder of an Acquired Fund will become a shareholder of its corresponding Acquiring Fund. In each Reorganization, the Acquiring Fund will issue a number of shares with a total value equal to the total value of the net assets of its corresponding Acquired Fund, and each shareholder of the Acquired Fund will receive a number of full and fractional shares of the Acquiring Fund with a value equal to the value of that shareholder's shares of the Acquired Fund, as of the close of regularly scheduled trading on the New York Stock Exchange on the closing date of the Reorganization (the "Effective Time"). The closing date for each Reorganization is expected to be January 12, 2007. Holders of Class A and Class B shares of an Acquired Fund will receive, respectively, Class A and Class B shares of the corresponding Acquiring Fund. All share classes of each Acquired Fund will vote in the aggregate and not by class. The consummation of the reorganization of one Acquired Fund into its corresponding Acquiring Fund may occur regardless of whether the consummation of the other Reorganization occurs. The terms and conditions of each Reorganization are more fully described below in this Proxy Statement/Prospectus and in each Plan of Reorganization, which is attached hereto as Appendix A. The Reorganizations will permit PIF to substitute for the Acquired Funds corresponding Acquiring Funds that the Board believes will better serve the interests of shareholders. Each Acquiring Fund is a new fund, which has investment objectives and strategies that are identical to those of its corresponding WM Acquired Fund and are substantially similar to those of its corresponding Acquired Fund. Accordingly, after the Reorganizations, it should be reasonable for shareholders to have the same investment expectations. The persons responsible for the day-to-day management of the WM Acquired Funds will be responsible for the day-to-day management of the Acquiring Funds. This is important to keep in mind because, for each of the 1, 5 and 10 year periods ended December 31, 2005, the WM Equity Income Fund has generated performance results that are superior to the returns of the Equity Income Fund. Similarly, the WM Tax-Exempt Bond Fund has produced results that are comparable to or exceed the performance of the Tax-Exempt Bond Fund over the same time periods. Although past performance is no guarantee of future results, shareholders may want to compare the performance records of each Acquired Fund and its corresponding WM Acquired Fund because that information will provide an indication of the risks of investing in the Acquired Funds versus their corresponding Acquiring Funds. Moreover, shareholders in each Acquired Fund may benefit from the Acquiring Fund's larger asset base resulting from the addition of the WM Acquired Fund's assets. As a result of the Reorganizations, the Acquiring Funds may have improved prospects for growth, may operate more efficiently and may have greater potential for attendant reductions in overall expenses. The factors that the Board considered in deciding to approve each of the Reorganizations are discussed below under "Information About the Reorganizations - Board Consideration of the Reorganizations." Each Reorganization will qualify as a tax-free reorganization and, for federal income tax purposes, no gain or loss will be recognized as a result of the Reorganization by any Acquired or Acquiring Fund shareholders. See "Information About the Reorganizations -- Federal Income Tax Consequences." The Reorganizations will not result in any material change in the purchase and redemption procedures followed with respect to the distribution of shares. See "Additional Information About the Funds - Purchases, Redemptions and Exchanges of Shares." None of the Acquired Funds, Acquiring Funds or their shareholders will incur any fees or expenses in connection with the Reorganizations (other than trading costs associated with disposing of any portfolio securities that would not be compatible with the investment objectives and strategies of an Acquiring Fund and reinvesting the proceeds in securities that would be compatible). PROPOSAL 1 APPROVAL OF A PLAN OF REORGANIZATION PROVIDING FOR THE REORGANIZATION OF THE EQUITY INCOME FUND INTO THE EQUITY INCOME FUND I Overview of the Reorganization Shareholders of the Equity Income Fund (the "Acquired Fund") are being asked to approve the reorganization of the Acquired Fund into the Equity Income Fund I (the "Acquiring Fund"). For a summary discussion of the form and consequences of, and the reasons for, the Reorganization, see "Overview of the Proposed Reorganizations." The Acquiring Fund is a new series of PIF that will commence operations at the Effective Time of the Reorganization. Pursuant to the related WM Fund Reorganization described under "Introduction" above, it is proposed that an existing WM Acquired Fund, the WM Equity Income Fund, will be reorganized into the Acquiring Fund immediately before the Acquired Fund. Consummation of the reorganization of the Acquired Fund into the Acquiring Fund is contingent upon the consummation of the reorganization of the WM Equity Income Fund into the Acquiring Fund. Comparison of Acquired and Acquiring Funds Equity Income Fund Equity Income Fund I (Acquired Fund) (Acquiring Fund) Approximate Net Assets as of 4/30/06 (unaudited): $109,872,644 None* *The Acquiring Fund will commence operations upon the consummation of the Reorganization, which will occur immediately after consummation of the related WM Fund Reorganization. At 4/30/06, the WM Equity Income Fund had net assets of $3,468,912,000 (unaudited). Investment Adviser: PMC PMC Sub-Advisor and Portfolio Manager(s): Principal Global WMA Portfolio manager: Portfolio manager: --Dirk Laschanzky, CFA; Portfolio Manager; joined --Joseph T. Suty, CFA, Vice President and Senior Principal Global in 1997. Portfolio Manager, WMA; prior to joining WMA in 2005, a portfolio manager for Washington Capital Management, Inc. Investment Objective: The Acquired Fund seeks to achieve high current The Acquiring Fund seeks to provide a relatively income and long-term growth of income and capital. high level of current income and long-term growth of income and capital. Principal Investment Strategies: The Acquired Fund seeks to achieve its objective by The Acquiring Fund invests primarily (normally at investing primarily in equity securities (such as least 80% of its net assets, plus any borrowings common stocks, preferred securities, which may be for investment purposes) in dividend-paying common convertible, and shares of real estate investment stocks and preferred stocks. trusts (REITs)). In selecting securities, Principal Global, places an emphasis on securities In selecting investments for the Acquiring Fund, with potentially high dividend yields. Under normal WMA looks for investments that provide regular market conditions, the Acquired Fund invests at income in addition to some opportunity for capital least 80% of its assets in equity securities. The appreciation. Equity investments are typically Acquired Fund may invest up to 20% of its assets in made in "value" stocks currently selling for less securities of foreign companies. than WMA believes they are worth. When determining how to invest the Acquired Fund's The Acquiring Fund may: assets in common stocks, Principal Global seeks stocks that it believes are undervalued in the --invest in fixed-income securities of any marketplace at the time of purchase. Securities maturity, including mortgage-backed securities, for the Acquired Fund are selected by consideration U.S. government securities, and asset-backed of the quality and price of individual issuers securities; rather than forecasting stock market trends. The selection process focuses on: --invest up to 20% of its assets in below-investment-grade fixed-income securities -- the determination that a stock is selling below (sometimes called "junk bonds"); its fair market value; --purchase or sell U.S. government securities or -- an early recognition of changes in a company's collateralized mortgage obligations on a underlying fundamentals; "when-issued" or "delayed-delivery" basis in an aggregate of up to 20% of the market value of its -- an evaluation of the sustainability of total net assets; fundamental changes; and --invest up to 20% of its assets in REIT -- monitoring a stock's behavior in the market. securities; and The equity investment philosophy of Principal --invest up to 25% of its assets in U.S. Global is based on the belief that superior stock dollar-denominated securities of foreign issuers. selection is the key to consistent out-performance. Principal Global believes The Acquiring Fund may write (sell) covered call superior stock selection may be achieved by a options. combination of systematically evaluating company fundamentals and in-depth original research. Principal Global focuses on four critical drivers of stock performance: improving business fundamentals; sustainable competitive advantages; rising investor expectations; and attractive relative valuation. To leverage its stock selection skills as the primary drivers of relative performance, Principal Global seeks to maximize global information advantages and neutralize unintended portfolio risks. Principal Global focuses its stock selection on established companies that it believes have a sustainable competitive advantage. Principal Global constructs a portfolio that is "benchmark aware" in that it is sensitive to the sector (companies with similar characteristics) and security weightings of its benchmark. However, the Acquired Fund is actively managed and prepared to over- and/or under-weight sectors and industries differently from the benchmark. Portfolio Turnover Rates: The Acquired Fund's portfolio turnover rates were: The WM Equity Income Fund's portfolio turnover rates were:* -- 90% for the six months ended 4/30/06 (unaudited) -- 36% for the six months ended 4/30/06 (unaudited); (annualized); -- 32% for the fiscal year ended 10/31/05; and -- 88.4% for the fiscal year ended 10/31/05; and -- 20% for the fiscal year ended 10/31/04. -- 134.7% for the fiscal year ended 10/31/04. *The Acquiring Fund will commence operations upon the consummation of the Reorganization, which will occur immediately after consummation of the related WM Fund Reorganization. The investment objectives and strategies of the Acquiring Fund will be identical to those of the WM Acquired Fund. Hedging and Other Strategic Transactions: Both the Acquired and the Acquiring Fund are authorized to use derivative instruments (financial arrangements the value of which is based on, or derived from, a security, asset or market index) such as futures, options, future contracts, options on future contracts and swaps to hedge against changing interest rates, security prices or currency exchange rates and for other strategic purposes. Temporary Defensive Investing: For temporary defensive purposes in times of unusual or adverse market conditions, both the Acquired Fund and the Acquiring Fund may invest in cash and cash equivalents. In taking such defensive measures, either Fund may fail to achieve its investment objective. Comparison of Investment Objectives and Strategies The investment objectives and principal investment strategies of the Acquired and Acquiring Funds are substantially similar. Both seek high current income and long-term growth of income and capital. Both Funds pursue their objectives by investing primarily in equity securities, such as common and preferred stock and shares of real estate investment trusts, that provide for regular income and the potential for capital appreciation. Both the Acquired and Acquiring Funds employ a value investing approach, seeking out investment opportunities that their respective sub-advisors believe are undervalued in the marketplace. While the Acquired Fund may invest up to 20% of its assets in foreign companies, the Acquiring Fund may invest up to 25% of its assets in U.S. dollar denominated securities of foreign issuers. In addition, the Acquiring Fund may invest up to 20% of its assets in fixed-income securities of any maturity, including below-investment grade fixed-income securities. Additional information about the investment strategies and the types of securities in which the Acquired and Acquiring Funds may invest is contained in, respectively, the PIF SAI and the Statement of Additional Information. The investment objective of each Fund may be changed by the Board without shareholder approval. The PIF SAI and the Statement of Additional Information provide further information about the portfolio manager(s) for the respective Funds, including information about compensation, other accounts managed and ownership of fund shares. The various hedging strategies available to the Funds are described in more detail below under "Hedging and Other Strategic Transactions." For an explanation of debt security ratings, see Appendix B to this Proxy Statement/Prospectus. Comparison of Principal Investment Risks In deciding whether to approve the Reorganization, shareholders should consider the amount and character of investment risk involved in the respective investment objectives and strategies of the Acquired and Acquiring Funds. Because the Funds have substantially similar investment objectives and strategies as described above, they have substantially the same risks. These include, in addition to credit and counterparty risk, liquidity risk, market risk and management risk, which are common to all funds, the following risks: Risks Applicable to Both Funds: - -- Equity Securities Risk -- Value Stock Risk -- Foreign Securities Risk - -- Exchange Rate Risk -- Real Estate Securities Risk -- Derivatives Risk - -- Prepayment or Call Risk Additional Risks Applicable to the Acquiring Fund: - -- Fixed-Income Securities Risk -- U.S. Government Securities Risk -- High Yield Securities Risk - -- Fund-of-Funds Risk All of the above named risks are more fully described below under "Risks of Investing in the Funds." Certain risks of investing in the Acquiring Fund are more fully described in Appendix C to this Proxy Statement/Prospectus and the Statement of Additional Information. The risks of investing in the Acquired Fund are more fully described in the PIF Prospectus and the PIF SAI. Fees and Expenses of the Funds The tables below compare the fees and expenses of the shares of the Acquired and Acquiring Funds. If shareholders of the Acquired Fund approve the Reorganization and the reorganization of the Acquired and Acquiring Funds takes place, holders of Class A and Class B shares of the Acquired Fund will receive, respectively, Class A and Class B shares of the Acquiring Fund. The fees and expenses of the Acquired and Acquiring Funds are more fully described in, respectively, the PIF Prospectus and Appendix D ("Costs of Investing in the Acquiring Funds") to this Proxy Statement/Prospectus. Shareholder Fees (fees paid directly from your investment) The following table shows the fees and expenses you may pay when you buy and hold shares of the Acquired Fund and the Acquiring Fund. Equity Income Fund Equity Income Fund I (Acquired Fund) (Acquiring Fund) Class A Class B Class A Class B Class B ------- ------- ------- ------- ------- (issued in connection (issued after with Reorganization)(7) Reorganization)(7) Maximum sales charge (load) imposed on purchases 5.75%(1) None 5.50%(1) None None (as a % of offering price) Maximum Contingent Deferred Sales Charge 0.75%(2) 4.00%(3) 1.00%(2) 4.00%(5) 5.00%(6) (CDSC) (as a % of dollars subject to charge) Redemption or Exchange Fee (as a % of amount redeemed/ 1.00%(4) 1.00%(4) 1.00%(4) 1.00%(4) 1.00%(4) exchanged) <FN> - ----------------------- (1) Sales charges are reduced or eliminated for purchases of $50,000 or more. (2) A CDSC applies on certain redemptions of Class A shares made within 18 months following purchases of $1 million or more made without a sales charge. (3) CDSCs are reduced after two years and eliminated after 7 years. (4) Excessive trading fees are charged when $30,000 or more of shares are redeemed or exchanged for another PIF Fund within 30 days after they are purchased. Excessive trading fees will not be applied to shares acquired in connection with the Reorganization. (5) CDSCs are reduced after two years and eliminated after 6 years. (6) CDSCs are reduced after two years and eliminated after 5 years. (7) For a discussion of the differences between Class B shares to be issued in connection with the Reorganization and after the Reorganization, see "Additional Information about the Funds - Differences between the Share Classes of the Acquired and Acquiring Funds." </FN> Fees and Expenses as a % of average daily net assets The following table shows: (a) the ratios of expenses to average net assets of the Class A and Class B shares of the Acquired Fund for the fiscal year ended October 31, 2005; (b) the estimated expense ratios of the Class A and Class B shares of the Acquiring Fund for the fiscal year ending October 31, 2007; and (c) the pro forma combined expense ratios of the Class A and Class B shares of the Acquiring Fund for the fiscal year ending October 31, 2007 assuming both the Reorganization and the related WM Fund Reorganization. The Acquiring Fund is a new series of PIF that will commence operations at the Effective Time of the Reorganization. Annual Fund Operating Expenses Management 12b-1 Other Total Fund Fee Waiver / Net Fees Fees Expenses Operating Expense Expenses Expenses Reimbursement (a) Equity Income Fund Class A 0.60% 0.24% 0.44% 1.28% -- 1.28% (Acquired Fund) Class B 0.60% 0.92% 0.71% 2.23% -- 2.23% (b) Equity Income Class A 0.51% 0.25% 0.10% 0.86% -- 0.86% Fund I (1) (2) (Acquiring Fund) Class B 0.51% 1.00% 0.23% 1.74% 0.01% 1.73% (Estimated) (c) Equity Income Class A 0.51% 0.25% 0.10% 0.86% -- 0.86% Fund I (1) (2) (Acquiring Fund) Class B 0.51% 1.00% 0.23% 1.74% 0.01% 1.73% (Pro forma estimated expenses assuming WM Fund Reorganization) <FN> - ----------------------- (1) PMC has contractually agreed to limit the Acquiring Fund's expenses attributable to Class A and Class B shares and, if necessary, pay expenses normally payable by the Fund through the period ending February 28, 2008. The expense limits will maintain for each such share class a total level of operating expenses (expressed as a percentage of average net assets on an annualized basis) not to exceed the following level of such expenses: Class A - 0.87%; and Class B - 1.73%. (2) The Acquiring Fund will not issue shares prior to the Effective Time of the related WM Fund Reorganization, which is scheduled to occur immediately before the Reorganization. The estimated expenses for the year ending October 31, 2007 shown in the table are based on the fees which will be in effect and on the other expenses which it is estimated the Acquiring Fund will incur subsequent to the Effective Time of the Reorganization. The fees and expenses shown in the table are intended to reflect those that will be in effect on an ongoing basis after the Reorganization. They are likely to be different from the expenses of the Acquiring Fund for financial reporting purposes for the fiscal year ending October 31, 2007 because, assuming the related WM Fund Reorganization is approved, the Acquiring Fund will carry forward the financial statements of the WM Equity Income Fund and report historical information of the WM Equity Income Fund for periods prior to the Effective Time of the Reorganization as its own. </FN> Examples: The following examples are intended to help you compare the costs of investing in shares of the Acquired and Acquiring Funds. The examples assume that fund expenses continue at the rates shown in the table above, that you invest $10,000 in the particular Fund for the time periods indicated and that all dividends and distributions are reinvested. The examples also assume that your investment has a 5% return each year. The examples should not be considered a representation of future expenses of the Acquired or Acquiring Fund. Actual expenses may be greater or less than those shown. 1 Year 3 Years 5 Years 10 Years If you sell your shares at the end of the period: Equity Income Fund Class A $698 $958 $1,237 $2,031 (Acquired Fund) Class B $626 $997 $1,395 $2,212 Equity Income Fund I Class A $633 $809 $1,001 $1,552 (Acquiring Fund) (Estimated) Class B(1) $576 $746 $1,042 $1,602 Equity Income Fund I Class A $633 $809 $1,001 $1,552 (Acquiring Fund) Class B(1) $576 $746 $1,042 $1,602 (Pro forma estimated expenses assuming WM Fund Reorganization) If you do not sell your shares at the end of the period: Equity Income Fund Class B $226 $697 $1,195 $2,212 (Acquired Fund) Equity Income Fund I Class B(1) $176 $546 $942 $1,602 (Acquiring Fund) Equity Income Fund I Class B(1) $176 $546 $942 $1,602 (Acquiring Fund) (Pro forma estimated expenses assuming WM Fund Reorganization) - ------------------ <FN> (1) These expense examples are for Class B shares that will be issued to you in the Reorganization. If you purchase Class B shares after the Reorganization, based on the assumptions stated above, your expenses would be: 1 Year 3 Years 5 Years 10 Years If you sell your shares at the end $676 $946 $1,142 $1,817 of the period: If you do not sell your shares at $176 $546 $942 $1,817 the end of the period: </FN> Investment Management Fees/Sub-Advisory Arrangements The Acquired Fund and the Acquiring Fund each pay their investment advisor, PMC, an advisory fee, which is calculated as a percentage of each Fund's average daily net assets pursuant to the following fee schedules: Equity Income Fund Equity Income Fund I (Acquired Fund) (Acquiring Fund) 0.60% of the first $500 million; 0.60% of the first $250 million; 0.58% of the next $500 million; 0.55% of the next $250 million; 0.56% of the next $500 million; and 0.50% of the excess over $500 million 0.55% of the excess over $1.5 billion of average daily net assets. of average daily net assets. Principal Global directly manages the assets of the Acquired Fund as its sub-advisor. Assuming approval of the related WM Fund Reorganization, WMA will manage the assets of the Acquiring Fund as its sub-advisor. For its services as sub-advisor to the Acquiring Fund, WMA will be paid a sub-advisory fee by PMC, not by the Acquiring Fund. A discussion of the basis of the Board of Directors' approval of the advisory and sub-advisory agreements with respect to the Acquired Fund is available in PIF's Annual Report to Shareholders for the fiscal year ended October 31, 2005. Performance The following table shows, for the indicated periods ended December 31, 2005, the annual total returns of the Class A and Class B shares of the Acquired Fund. Performance information for the Acquiring Fund is not presented because the Acquiring Fund has not yet commenced operations. Assuming the related WM Fund Reorganization is approved, the Acquiring Fund, after the Reorganization, will assume the historical performance of the Class A and Class B shares of the WM Equity Income Fund as the historical performance of, respectively, the Class A and Class B shares of the Acquiring Fund for periods prior to the Effective Time of the Reorganization. Accordingly, for comparison purposes, the table below also shows performance information for the Class A and Class B shares of the WM Equity Income Fund. Appendix E to this Proxy Statement/Prospectus contains additional performance information for the Acquired Fund and the WM Equity Income Fund. Average Annual Total Returns (%) for periods ended December 31, 2005 Past Past Past 10 1 Year 5 Years Years Equity Income Fund (Acquired Fund) (1) - --Class A (before taxes) 2.02% -3.14% 5.51% (after taxes on distributions) (2) 1.15% -3.98% 3.89% (after taxes on distributions and 1.58% -3.07% 4.05% sale of shares) - --Class B (3) 3.10% -3.20% 5.55% Past Past Past 10 1 Year 5 Years Years WM Equity Income Fund - --Class A (before taxes) 3.43% 8.25% 10.03% (after taxes on distributions) (2) 2.64% 7.38% 8.04% (after taxes on distributions and 3.25% 6.73% 7.62% sale of shares) - --Class B (3) 3.55% 8.21% 9.90% <FN> - ------------------ (1) Class A and Class B shares began operations on June 30, 2005 when the Acquired Fund succeeded to the operations, and assumed the historical performance, of the Class A and Class B shares of a predecessor fund. For periods prior to the date on which those classes succeeded to the operations of the Class A and Class B shares of the predecessor fund, the returns of the Class A and Class B shares of the Acquired Fund are based on the performance of the Class A and Class B shares of the predecessor fund. The predecessor fund's Class A shares commenced operations on December 16, 1992, and its Class B shares commenced operations on December 9, 1994. (2) After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns will depend on an investor's tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. (3) After-tax performance is shown for Class A shares only. The after-tax returns for Class B shares will vary. </FN> PROPOSAL 2 APPROVAL OF A PLAN OF REORGANIZATION PROVIDING FOR THE REORGANIZATION OF THE TAX-EXEMPT BOND FUND INTO THE TAX-EXEMPT BOND FUND I Overview of the Reorganization Shareholders of the Tax-Exempt Bond Fund (the "Acquired Fund") are being asked to approve the reorganization of the Acquired Fund into the Tax-Exempt Bond Fund I (the "Acquiring Fund"). For a summary discussion of the form and consequences of, and the reasons for, the Reorganization, see "Overview of the Proposed Reorganizations." The Acquiring Fund is a new series of PIF that will commence operations at the Effective Time of the Reorganization. Pursuant to the related WM Fund Reorganization described under "Introduction" above, it is proposed that an existing WM Acquired Fund, the WM Tax-Exempt Bond Fund, will be reorganized into the Acquiring Fund immediately before the Acquired Fund. Consummation of the reorganization of the Acquired Fund into the Acquiring Fund is contingent upon the consummation of the reorganization of the WM Tax-Exempt Bond Fund into the Acquiring Fund. Comparison of Acquired and Acquiring Funds Tax-Exempt Bond Fund Tax-Exempt Bond Fund I (Acquired Fund) (Acquiring Fund) Approximate Net Assets as of 4/30/06 (unaudited): $156,270,835 None * * The Acquiring Fund will commence operations upon the consummation of the Reorganization, which will occur immediately after consummation of the related WM Fund Reorganization. At 4/30/06, the WM Tax-Exempt Bond Fund had net assets of $199,139,000 (unaudited). Investment Adviser: PMC PMC Sub-Advisor(s) and Portfolio Manager(s): Principal Global Van Kampen NAM Portfolio managers: Portfolio manager: --Thomas V. Catus, CFA; Portfolio Analyst; joined --Thomas M. Bryon, Vice President, Van Kampen; Principal Global in 2000. joined Van Kampen in 1981. --John V. Miller, CFA; Vice President; joined NAM in 1996. Investment Objective: The Acquired Fund seeks as high a level of current The Acquiring Fund seeks to provide a high level of income exempt from federal income tax as is income that is exempt from federal income tax while consistent with preservation of capital. protecting investors capital. Principal Investment Strategies: The Acquired Fund seeks to achieve its objective The Acquiring Fund invests primarily in municipal primarily through the purchase of investment grade obligations issued by states, counties, cities or quality, tax-exempt fixed-income obligations. The other governmental entities. Under normal market Acquired Fund invests in a diversified portfolio of conditions, the Acquiring Fund invests at least 80% securities issued by or on behalf of state or local of its net assets in municipal obligations, governments and other public authorities. In the including inverse floating rate obligations. The opinion of the issuer's bond counsel, interest on Acquiring Fund specifically limits these these obligations is exempt from federal income investments to municipal bonds, municipal notes and tax. Under normal market conditions, the Fund securities of unaffiliated tax-exempt mutual funds. invests at least 80% of its assets in municipal obligations and not more than 20% of its assets in The Acquiring Fund may also invest up to 20% of its securities that do not meet the criteria stated assets in high yield, non-investment grade above (taxable securities; or municipal obligations fixed-income securities (commonly known as "junk the interest on which is treated as a tax bonds"). preference item for purposes of the federal alternative minimum tax). The Acquired Fund may In adverse markets, the Acquiring Fund may seek to also invest in taxable securities that mature one protect its investment position by investing up to year or less from the time of purchase. These 50% of its assets in taxable short-term investments taxable investments are generally made for such as: liquidity purposes or as a temporary investment of cash pending investment in municipal obligations. --U.S. government securities; Under unusual market or economic conditions and for temporary defensive purposes, the Fund may invest --commercial paper rated in the highest grade by more than 20% of its assets in taxable securities. either S&P, Moody's or Fitch; Principal Global selects securities, which at the --obligations of U.S. banks; time they are purchased, are: municipal bonds which are rated in the four highest grades by Moody's --time or demand deposits in U.S. banks; and Investors Service, Inc. ("Moody's"); municipal notes rated in the highest grade by Moody's; --repurchase agreements relating to municipal municipal commercial paper rated in the highest securities or any of the foregoing taxable grade by Moody's or Standard & Poor's Rating instruments. Service ("S&P"), or if unrated, are of comparable quality in the opinion of Principal Global. Interest income from these investments that is distributed to shareholders by the Acquiring Fund NAM may invest up to 20% of the Acquired Fund's net may be taxable. assets in medium- to low-quality bonds (BBB/Baa or lower) as rated by at least one independent rating The Acquiring Fund may also: agency, or if unrated, judged to be of comparable quality by the NAM. NAM uses a research-intensive --purchase and sell interest rate futures and investment process to identify high-yielding options; and municipal bonds that offer attractive value in terms of their current yields, prices, credit --invest up to 20% of its assets in AMT-subject quality, liquidity and future prospects. The bonds. Acquired Fund may buy securities that pay interest at rates that float inversely with changes in The Acquiring Fund is classified as a prevailing interest rates. The Acquired Fund may non-diversified investment company under the 1940 also make forward commitments in which the Acquired Act. Fund agrees to buy a security in the future at a price agreed upon today. The Acquired Fund is classified as a diversified investment company under the 1940 Act. Portfolio Turnover Rates: The Acquired Fund's portfolio turnover rates were: The WM Tax-Exempt Bond Fund's portfolio turnover rates were:* -- 105.7% for the six months ended 4/30/06 -- 11% for the six months ended 4/30/06 (unaudited); (unaudited) (annualized); -- 28% for the fiscal year ended 10/31/05; and -- 54.2% for the fiscal year ended 10/31/05; and -- 25% for the fiscal year ended 10/31/04. -- 70.3% for the fiscal year ended 10/31/04. *The Acquiring Fund will commence operations upon the consummation of the Reorganization, which will occur immediately after consummation of the related WM Fund Reorganization. The investment objectives and strategies of the Acquiring Fund will be identical to those of the WM Acquired Fund. Hedging and Other Strategic Transactions: Both the Acquired and the Acquiring Fund are authorized to use derivative instruments (financial arrangements the value of which is based on, or derived from, a security, asset or market index) such as futures, options, future contracts, options on future contracts and swaps to hedge against changing interest rates, security prices or currency exchange rates and for other strategic purposes. Temporary Defensive Investing: For temporary defensive purposes in times of unusual or adverse market conditions, the Acquiring Fund may invest in cash and cash equivalents. In taking such defensive measures, the Acquiring Fund may fail to achieve its investment objective. Comparison of Investment Objectives and Strategies The investment objectives and principal strategies of the Acquired and Acquiring Funds are substantially similar as both Funds seek a high level of income that is exempt from federal income tax while protecting investors' capital. Both Funds seek to achieve their objectives by investing primarily in investment-grade municipal securities but both may invest up to 20% of their assets in non-investment-grade debt securities (commonly known as "junk bonds"). The two Funds differ primarily in that the Acquired Fund, under unusual market or economic conditions and for temporary defensive purposes, may invest up to 20% of its assets in taxable securities while the Acquiring Fund may, in adverse markets, invest up to 50% of its assets in such securities. Moreover, the Acquired Fund is diversified while the Acquiring Fund is non-diversified. This means that a relatively high percentage of assets of the Acquiring Fund may be invested in the obligations of a limited number of issuers. Additional information about the investment strategies and the types of securities in which the Acquired and Acquiring Funds may invest is contained in, respectively, the PIF SAI and the Statement of Additional Information. The investment objective of each Fund may be changed by the Board without shareholder approval. The PIF SAI and the Statement of Additional Information provide further information about the portfolio manager(s) for the respective Funds, including information about compensation, other accounts managed and ownership of fund shares. The various hedging strategies available to the Funds are described in more detail below under "Hedging and Other Strategic Transactions." For an explanation of debt security ratings, see Appendix B to this Proxy Statement/Prospectus. Comparison of Principal Investment Risks In deciding whether to approve the Reorganization, shareholders should consider the amount and character of investment risk involved in the respective investment objectives and strategies of the Acquired and Acquiring Funds. Because both Funds invest primarily in tax-exempt municipal securities, they have substantially similar risks. These include, in addition to credit and counterparty risk, liquidity risk, market risk and management risk, which are common to all funds, the following risks: Risks Applicable to Both Funds: - -- Fixed-Income Securities Risk -- Municipal Securities Risk -- High Yield Securities Risk - -- Derivatives Risk Risk Applicable to the Acquiring Fund: - -- Non-Diversification Risk All of the above named risks are more fully described below under "Risks of Investing in the Funds." Certain risks of investing in the Acquiring Fund are more fully described in Appendix C to this Proxy Statement/Prospectus and the Statement of Additional Information. The risks of investing in the Acquired Fund are more fully described in the PIF Prospectus and the PIF SAI. Fees and Expenses of the Funds The tables below compare the fees and expenses of the shares of the Acquired and Acquiring Funds. If shareholders of the Acquired Fund approve the Reorganization and the reorganization of the Acquired and Acquiring Funds takes place, holders of Class A and Class B shares of the Acquired Fund will receive, respectively, Class A and Class B shares of the Acquiring Fund. The fees and expenses of the Acquired Fund are more fully described in the Acquired Fund Prospectus. The fees and expenses of the Acquired and Acquiring Funds are more fully described in, respectively, the PIF Prospectus and Appendix D ("Costs of Investing in the Acquiring Funds") to this Proxy Statement/Prospectus. Shareholder Fees (fees paid directly from your investment) The following table shows the fees and expenses you may pay when you buy and hold shares of the Acquired Fund and the Acquiring Fund. Tax-Exempt Bond Fund Tax-Exempt Bond Fund I (Acquired Fund) (Acquiring Fund) Class A Class B Class A Class B Class B ------- ------- ------- ------- ------- (issued in connection (issued after with Reorganization)(7) Reorganization)(7) Maximum sales charge (load) imposed on purchases 4.75%(1) None 4.50%(1) None None (as a % of offering price) Maximum Contingent Deferred Sales Charge 0.75%(2) 4.00%(3) 1.00%(2) 4.00%(5) 5.00%(6) (CDSC) (as a % of dollars subject to charge) Redemption or Exchange Fee (as a % of amount redeemed/ 1.00%(4) 1.00%(4) 1.00%(4) 1.00%(4) 1.00%(4) exchanged) <FN> - ----------------------- (1) Sales charges are reduced or eliminated for purchases of $50,000 or more. (2) A CDSC applies on certain redemptions of Class A shares made within 18 months following purchases of $1 million or more made without a sales charge. (3) CDSCs are reduced after two years and eliminated after 7 years. (4) Excessive trading fees are charged when $30,000 or more of shares are redeemed or exchanged for another PIF Fund within 30 days after they are purchased. Excessive trading fees will not be applied to shares acquired in connection with the Reorganization. (5) CDSCs are reduced after two years and eliminated after 6 years. (6) CDSCs are reduced after two years and eliminated after 5 years. (7) For a discussion of the differences between Class B shares to be issued in connection with the Reorganization and after the Reorganization, see "Additional Information about the Funds - Differences between the Share Classes of the Acquired and Acquiring Funds." </FN> Fees and Expenses as a % of average daily net assets The following table shows: (a) the ratios of expenses to average net assets of the Class A and Class B shares of the Acquired Fund for the fiscal year ended October 31, 2005; (b) the estimated expense ratios of the Class A and Class B shares of the Acquiring Fund for the fiscal year ending October 31, 2007; and (c) the pro forma combined expense ratios of the Class A and Class B shares of the Acquiring Fund for the fiscal year ending October 31, 2007 assuming both the Reorganization and the related WM Fund Reorganization. The Acquiring Fund is a new series of PIF that will commence operations at the Effective Time of the Reorganization. Annual Fund Operating Expenses Management 12b-1 Other Total Fund Fee Waiver / Net Fees Fees Expenses Operating Expense Expenses Expenses Reimbursement (a) Tax-Exempt Bond Class A 0.50% 0.21% 0.07% 0.78% 0.02% 0.76% Fund (1) (Acquired Fund) Class B 0.50% 0.40% 0.37% 1.27% 0.12% 1.15% (b) Tax-Exempt Bond Class A 0.50% 0.25% 0.06% 0.81% 0.05% 0.76% Fund I (2) (3) (Acquiring Fund) Class B 0.50% 1.00% 0.15% 1.65% 0.50% 1.15% (Estimated) (c) Tax-Exempt Bond Class A 0.50% 0.25% 0.06% 0.81% 0.05% 0.76% Fund I (2) (3) (Acquiring Fund) Class B 0.50% 1.00% 0.15% 1.65% 0.50% 1.15% (Pro forma estimated expenses assuming WM Fund Reorganization) <FN> - ----------------------- (1) PMC has contractually agreed to limit the Acquired Fund's expenses and, if necessary, pay expenses normally payable by the Fund through the period ending June 30, 2008. The expense limit will maintain a total level of operating expenses (expressed as a percent of average net assets attributable to Class A and Class B shares on an annualized basis) not to exceed 0.76% for Class A and 1.15% for Class B. (2) PMC has contractually agreed to limit the Acquiring Fund's expenses and, if necessary, pay expenses normally payable by the Fund through the period ending June 30, 2008. The expense limit will maintain a total level of operating expenses (expressed as a percent of average net assets attributable to Class A and Class B shares on an annualized basis) not to exceed 0.76% for Class A and 1.15% for Class B. (3) The Acquiring Fund will not issue shares prior to the Effective Time of the related WM Fund Reorganization, which is scheduled to occur immediately before the Reorganization. The estimated expenses for the year ending October 31, 2007 shown in the table are based on the fees which will be in effect and on the other expenses which it is estimated the Acquiring Fund will incur subsequent to the Effective Time of the Reorganization. The fees and expenses shown in the table are intended to reflect those that will be in effect on an ongoing basis after the Reorganization. They are likely to be different from the expenses of the Acquiring Fund for financial reporting purposes for the fiscal year ending October 31, 2007 because, assuming the related WM Fund Reorganization is approved, the Acquiring Fund will carry forward the financial statements of the WM Tax-Exempt Bond Fund and report historical information of the WM Tax-Exempt Bond Fund for periods prior to the Effective Time of the Reorganization as its own. </FN> Examples: The following examples are intended to help you compare the costs of investing in shares of the Acquired and Acquiring Funds. The examples assume that fund expenses continue at the rates shown in the table above, that you invest $10,000 in the particular Fund for the time periods indicated and that all dividends and distributions are reinvested. The examples also assume that your investment has a 5% return each year. The examples should not be considered a representation of future expenses of the Acquired or Acquiring Fund. Actual expenses may be greater or less than those shown. 1 Year 3 Years 5 Years 10 Years If you sell your shares at the end of the period: Tax-Exempt Bond Fund Class A $549 $707 $883 $1,391 (Acquired Fund) Class B $517 $672 $867 $1,307 Tax-Exempt Bond Fund I Class A $524 $685 $867 $1,395 (Acquiring Fund) (Estimated) Class B(1) $517 $593 $874 $1,409 Tax-Exempt Bond Fund I Class A $524 $685 $867 $1,395 (Acquiring Fund) Class B(1) $517 $593 $874 $1,409 (Pro forma estimated expenses assuming WM Fund Reorganization) If you do not sell your shares at the end of the period: Tax-Exempt Bond Fund Class B $117 $372 $667 $1,307 (Acquired Fund) Tax-Exempt Bond Fund I Class B(1) $117 $393 $774 $1,409 (Acquiring Fund) Tax-Exempt Bond Fund I Class B(1) $117 $393 $774 $1,409 (Acquiring Fund) (Pro forma estimated expenses assuming WM Fund Reorganization) <FN> - ------------------ (1) These expense examples are for Class B shares that will be issued to you in the Reorganization. If you purchase Class B shares after the Reorganization, based on the assumptions stated above, your expenses would be: 1 Year 3 Years 5 Years 10 Years If you sell your shares at the end $617 $793 $974 $1,617 of the period: If you do not sell your shares at $117 $393 $774 $1,617 the end of the period: </FN> Investment Management Fees/Sub-Advisory Arrangements The Acquired Fund and the Acquiring Fund each pay their investment advisor, PMC, an advisory fee, which is calculated as a percentage of each Fund's average daily net assets pursuant to the following fee schedules: Tax-Exempt Bond Fund Tax-Exempt Bond Fund I (Acquired Fund) (Acquiring Fund) 0.50% of the first $500 million; 0.50% of the first $500 million; 0.48% of the next $500 million; 0.48% of the next $500 million; 0.46% of the next $500 million; and 0.46% of the next $500 million; and 0.45% of the excess over $1.5 billion 0.45% of the excess over $1.5 billion of of average daily net assets. average daily net assets. Principal Global and NAM directly manage the assets of the Acquired Fund as its sub-advisors. Assuming approval of the WM Fund Reorganization, Van Kampen will manage the assets of the Acquiring Fund as its sub-advisor. For its services as sub-advisor to the Acquiring Fund, Van Kampen will be paid a sub-advisory fee by PMC, not by the Acquiring Fund. A discussion of the basis of the Board of Directors' approval of the advisory and sub-advisory agreements with respect to the Acquired Fund is available in PIF's Annual Report to Shareholders for the fiscal year ended October 31, 2005. Performance The following table shows, for the indicated periods ended December 31, 2005, the annual total returns of the Class A and Class B shares of the Acquired Fund. Performance information for the Acquiring Fund is not presented because the Acquiring Fund has not yet commenced operations. Assuming the related WM Fund Reorganization is approved, the Acquiring Fund, after the Reorganization, will assume the historical performance of the Class A and Class B shares of the WM Tax-Exempt Bond Fund as the historical performance of, respectively, the Class A and Class B shares of the Acquiring Fund for periods prior to the Effective Time of the Reorganization. Accordingly, for comparison purposes, the table below also shows performance information for the Class A and Class B shares of the WM Tax-Exempt Bond Fund. Appendix E to this Proxy Statement/Prospectus contains additional performance information for the Acquired Fund and the WM Tax-Exempt Bond Fund. Average Annual Total Returns (%) for periods ended December 31, 2005 Past Past Past 10 1 Year 5 Years Years Tax-Exempt Bond Fund (Acquired Fund) (1) - --Class A (before taxes) -2.22% 4.09% 4.36% (after taxes on distributions) (2) -2.45% 3.96% 4.27% (after taxes on distributions and 0.05% 4.05% 4.34% sale of shares) - --Class B (3) -1.59% 4.19% 4.44% Past Past Past 10 1 Year 5 Years Years WM Tax-Exempt Bond Fund - --Class A (before taxes) -1.50% 4.19% 4.35% (after taxes on distributions) (2) -1.81% 3.98% 4.25% (after taxes on distributions and 0.81% 4.17% 4.36% sale of shares) - --Class B (3) -2.63% 4.05% 4.19% <FN> - ------------------ (1) Class A and Class B shares began operations on June 30, 2005 when the Acquired Fund succeeded to the operations, and assumed the historical performance, of the Class A and Class B shares of a predecessor fund. For periods prior to the date on which those classes succeeded to the operations of the Class A and Class B shares of the predecessor fund, the returns of the Class A and Class B shares of the Acquired Fund are based on the performance of the Class A and Class B shares of the predecessor fund. The predecessor fund's Class A shares commenced operations on March 20, 1986, and its Class B shares commenced operations on December 9, 1994. (2) After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns will depend on an investor's tax situation and may differ from those shown. (3) After-tax performance is shown for Class A shares only. The after-tax returns for Class B shares will vary. </FN> RISKS OF INVESTING IN THE FUNDS The principal risks of investing in the Acquired Funds and the Acquiring Funds are stated above as to each Fund in the proposal relating to the Reorganization involving that Fund. Each of these risks is summarized below. The risks of investing in the Acquiring Funds are further described in Appendix C to this Proxy Statement/Prospectus and the Statement of Additional Information. The risks of investing in the Acquired Funds are more fully described in the PIF Prospectus and the PIF SAI. Credit and Counterparty Risk (All Funds) Each of the funds is subject to the risk that the issuer or guarantor of a fixed-income security or other obligation, the counterparty to a derivatives contract or repurchase agreement, or the borrower of a portfolio's securities will be unable or unwilling to make timely principal, interest, or settlement payments, or otherwise to honor its obligations. Derivatives Risk (All Funds) The funds may use certain derivative instruments (such as options, futures and swaps) which could produce disproportionate gains or losses. Derivatives are generally considered riskier than direct investments and, in a down market, could become harder to value or sell at a fair price. Equity Securities Risk (Equity Income Fund and Equity Income Fund I) Equity securities include common, preferred and convertible preferred stocks and securities the values of which are tied to the price of stocks, such as rights, warrants and convertible debt securities. Common and preferred stocks represent equity ownership in a company. Stock markets are volatile, and the price of equity securities (and their equivalents) will fluctuate. The value of equity securities purchased by a fund could decline if the financial condition of the companies in which the fund invests decline or if overall market and economic conditions deteriorate. Exchange Rate Risk (Equity Income Fund and Equity Income Fund I) Because foreign securities are generally denominated in foreign currencies, the value of the net assets of a fund as measured in U.S. dollars will be affected by changes in exchange rates. To protect against future uncertainties in foreign currency exchange rates, the funds are authorized to enter into certain foreign currency exchange transactions. In addition, the fund's foreign investments may be less liquid and their price more volatile than comparable investments in U.S. securities. Settlement periods may be longer for foreign securities and portfolio liquidity may be affected. Fixed-Income Securities Risk (Both Acquiring Funds and Tax-Exempt Bond Fund) Fixed-income securities are generally subject to two principal types of risks: interest rate risk and credit quality risk. Interest Rate Risk. Fixed-income securities are affected by changes in interest rates. When interest rates decline, the market value of the fixed-income securities generally can be expected to rise. Conversely, when interest rates rise, the market value of fixed-income securities generally can be expected to decline. Credit Quality Risk. Fixed-income securities are subject to the risk that the issuer of the security will not repay all or a portion of the principal borrowed and will not make all interest payments. If the credit quality of a fixed income security deteriorates after a fund has purchased the security, the market value of the security may decrease and lead to a decrease in the value of the fund's investments. Lower quality and longer maturity bonds will be subject to greater credit risk and price fluctuations than higher quality and shorter maturity bonds. Bonds held by a fund may be affected by unfavorable political, economic, or government developments that could affect the repayment of principal or the payment of interest. Foreign Securities Risk (Equity Income Fund and Equity Income Fund I) Foreign securities carry risks that are not generally found in securities of U.S. companies. These risks include the loss of value as a result of political instability and financial and economic events in foreign countries. In addition, nationalization, expropriation or confiscatory taxation and foreign exchange restrictions could adversely affect a fund's investments in a foreign country. Foreign securities may be subject to less stringent reporting, accounting and disclosure standards than are required of U.S. companies, and foreign countries may also have problems associated with and causing delays in the settlement of sales. Fund-of-Funds Risk (Equity Income Fund I) In connection with the WM Fund Reorganizations, PIF will acquire other funds that operate as funds-of-funds (the "PIF SAM Funds"), which will invest principally in other PIF Funds, including the Equity Income Fund I. In addition, PIF has six series, the LifeTime Funds, that operate as funds-of-funds and invest principally in other PIF Funds. From time to time, an underlying fund, such as the Equity Income Fund I, may experience relatively large investments or redemptions by a fund of funds due to reallocations or rebalancings of its assets. These transactions may have adverse effects on underlying fund performance to the extent an underlying fund is required to sell portfolio securities to meet such redemptions, or to invest cash from such investments, at times it would not otherwise do so. This may be particularly important when a fund of funds owns a significant portion of an underlying fund. These transactions may also accelerate the realization of taxable income if sales of portfolio securities result in gains, and could increase transaction costs. In addition, when a fund of funds reallocates or redeems significant assets away from an underlying fund, the loss of assets to the underlying fund could result in increased expenses for that fund. WMA currently serves as advisor to the WM SAM Funds and will serve as sub-advisor to the PIF SAM Funds after the WM Fund Reorganizations. WMA is committed to minimizing the potential impact of fund-of-funds risk on underlying funds to the extent consistent with pursuing the investment objectives of the funds-of-funds which it manages. To the extent WMA manages, as advisor or sub-advisor, both a fund-of-funds and certain of its underlying funds, WMA may face conflicts of interest in fulfilling its responsibilities to all such funds. As of October 31, 2005, the five WM SAM Funds owned, in the aggregate, 51% of the outstanding shares of the WM Equity Income Fund. As of October 31, 2005, none of the PIF LifeTime Funds owned any of the outstanding shares of either Acquired Fund. High Yield Securities Risk (Both Acquiring Funds and Tax-Exempt Bond Fund) Fixed-income securities that are not investment grade are commonly referred to as high yield securities or "junk bonds." While these securities generally provide greater income potential than investments in higher rated fixed-income securities, there is a greater risk that principal and interest payments will not be made. Issuers of these securities may even go into default or become bankrupt. High yield securities generally involve greater price volatility and may be less liquid than higher rated fixed-income securities. High yield securities are considered speculative by the major credit rating agencies. Liquidity Risk (All Funds) A fund is exposed to liquidity risk when trading volume, lack of a market maker, or legal restrictions impair the fund's ability to sell particular securities or close derivative positions at an advantageous price. Funds with principal investment strategies that involve securities of companies with smaller market capitalizations, foreign securities, derivatives, or securities with substantial market and/or credit risk tend to have the greatest exposure to liquidity risk. Exposure to liquidity risk may be heightened for funds that invest in emerging markets and related derivatives that are not widely traded and that may be subject to purchase and sale restrictions. Management Risk (All Funds) The Acquired and Acquiring Funds are actively managed by their sub-advisors. The performance of a fund that is actively managed will reflect in part the ability of its portfolio manager(s) to make investment decisions that are suited to achieving the fund's investment objective. If the sub-advisor's investment strategies do not perform as expected, the fund could underperform other mutual funds with similar investment objectives or lose money. Market Risk (All Funds) The value of a fund's portfolio securities may go down in response to overall stock or bond market movements. Markets tend to move in cycles, with periods of rising prices and periods of falling prices. Stocks tend to go up and down in value more than bonds. If the fund's investments are concentrated in certain sectors, its performance could be worse than the overall market. Municipal Securities Risk (Tax-Exempt Bond Fund and Tax-Exempt Bond Fund I) Principal and interest payments of municipal securities may not be guaranteed by the issuing body and may be payable only from a particular source. If the source does not perform as expected, principal and income payments may not be made on time or at all. In addition, the market for municipal securities is often thin and may be temporarily affected by large purchases and sales, including those of funds investing in such securities. Funds that invest in municipal securities are also subject to the risk that some or all of the interest they receive from such securities might become taxable by law or determined by the Internal Revenue Service (or the relevant state's tax authority) to be taxable, in which event the value of such funds' investments would likely decline. The Tax-Exempt Bond Fund may invest without limit in obligations of issuers located in the same state. It may also invest in debt obligations that are repayable out of revenue from economically related projects or facilities. This represents a risk to the Fund since an economic, business or political development or change affecting one security could also affect others. Non-Diversification Risk (Tax-Exempt Bond Fund I) The Tax-Exempt Bond Fund I is classified as a non-diversified investment company under the 1940 Act, which means that a relatively high percentage of assets of the Fund may be invested in the obligations of a limited number of issuers. The value of the shares of the Fund may be more susceptible to a single economic, political or regulatory occurrence than the shares of a diversified investment company. Prepayment or Call Risk (Equity Income Fund and Equity Income Fund I) Some investments give the issuer the option to call, or redeem, its securities before their maturity date. If an issuer calls its security during a time of declining interest rates, a fund may have to reinvest the proceeds in securities with lower rates. In addition, a fund's appreciation may be limited by issuer call options having more value during times of declining interest rates. Real Estate Securities Risk (Equity Income Fund and Equity Income Fund I) Real estate investments trusts (REITs) or other real estate-related securities are subject to the risks associated with direct ownership of real estate, including declines in the value of real estate, risks related to general and local economic conditions, increases in property taxes and operating expenses, changes in zoning laws, changes in interest rates, and liabilities resulting from environmental problems. Equity and mortgage REITs are dependent on management skills and generally are not diversified. Equity REITs are affected by the changes in the value of the properties owned by the trust. Mortgage REITs are affected by the quality of the credit extended. Both equity and mortgage REITs: o may not be diversified with regard to the types of tenants (thus subject to business developments of the tenant(s)); o may not be diversified with regard to the geographic locations of the properties (thus subject to regional economic developments); o are subject to cash flow dependency and defaults by borrowers; and o could fail to qualify for tax-free pass-through of income under the Internal Revenue Code. U.S. Government Securities Risk (Equity Income Fund I) U.S. government securities do not involve the degree of credit risk associated with investments in lower quality fixed-income securities. As a result, the yields available from U.S. government securities are generally lower than the yields available from many other fixed-income securities. Like other fixed-income securities, the values of U.S. government securities change as interest rates fluctuate. Fluctuations in the value of a fund's securities do not affect interest income on securities already held by the fund but are reflected in the fund's price per share. Since the magnitude of these fluctuations generally is greater at times when a fund's average maturity is longer, under certain market conditions a fund may invest in short-term investments yielding lower current income rather than investing in higher yielding longer term securities. Value Stock Risk (Equity Income Fund and Equity Income Fund I) A fund's investments in value stocks carries the risk that the market will not recognize a security's intrinsic value for a long time or that a stock judged to be undervalued may actually be appropriately priced. A value stock may not increase in price if other investors fail to recognize the company's value and bid up the price or invest in markets favoring faster growing companies. A fund's strategy of investing in value stocks also carries the risk that in certain markets value stocks will underperform growth stocks. HEDGING AND OTHER STRATEGIC TRANSACTIONS Each of the Acquired and Acquiring Funds is authorized to use a variety of investment strategies. These strategies will be used primarily for hedging purposes, including hedging various market risks (such as interest rates, currency exchange rates and broad or specific market movements) and managing the effective maturity or duration of debt instruments held by the Fund. Hedging refers to protecting against possible changes in the market value of securities a Fund already owns or plans to buy or protecting unrealized gains in the Fund. These strategies may also be used to gain exposure to a particular securities market. The hedging and other strategic transactions which may be used are described below: o exchange-listed and over-the-counter put and call options on securities, financial futures contracts and fixed income indices and other financial instruments, o financial futures contracts (including stock index futures), o interest rate transactions,* and o currency transactions.** * A Fund's interest rate transactions may take the form of swaps, caps, floors and collars. ** A Fund's currency transactions may take the form of currency forward contracts, currency futures contracts, currency swaps and options on currencies or currency futures contracts. Collectively, these transactions are referred to in this Proxy Statement/Prospectus as "Hedging and Other Strategic Transactions." Hedging and Other Strategic Transactions may be used for the following purposes: o to attempt to protect against possible changes in the market value of securities held or to be purchased by a Fund resulting from securities markets or currency exchange rate fluctuations, o to protect a Fund's unrealized gains in the value of its securities, o to facilitate the sale of a Fund's securities for investment purposes, o to manage the effective maturity or duration of a Fund's securities, o to establish a position in the derivatives markets as a substitute for purchasing or selling securities in a particular market, or o to increase exposure to a foreign currency or to shift exposure to foreign currency fluctuations from one country to another. The ability of a Fund to utilize Hedging and Other Strategic Transactions successfully will depend in part on its sub-advisor's ability to predict pertinent market movements, which cannot be assured. The skills required to successfully utilize Hedging and Other Strategic Transactions are different from those needed to select a Fund's securities. While a sub-advisor will use Hedging and Other Strategic Transactions in a Fund primarily for hedging purposes or to gain exposure to a particular securities market, if the transaction is not successful it could result in a loss to the Fund. These transactions may also increase the volatility of a Fund and may involve a small investment of cash relative to the magnitude of the risks assumed. The potential loss from the use of futures can exceed a Fund's initial investment in such contracts. In addition, these transactions could result in a loss to the Fund if the counterparty to the transaction does not perform as promised. INFORMATION ABOUT THE REORGANIZATIONS Plans of Reorganization Each Acquired Fund has entered into a Plan with its corresponding Acquiring Fund. The Plans are the same in all material respects, except for the Acquired and Acquiring Funds to which they apply. The terms of the Plans are summarized below. The summary is qualified in its entirety by reference to the Plans, copies of which are attached as Appendix A to this Proxy Statement/Prospectus. Under each Plan, the Acquiring Fund will acquire all the assets and assume all the liabilities of the Acquired Fund and will issue to the Acquired Fund the number of shares of common stock of each share class of the Acquiring Fund that has a net asset value equal to the net asset value attributable to each corresponding share class of the Acquired Fund. We expect that the closing date will be January 12, 2007, assuming shareholder approval of the Plans, and that the Effective Time of the Reorganization will be as of the close of regularly scheduled trading on the NYSE (normally 3:00 p.m., Central Time) on that date. Each Fund will determine its net asset values as of the close of trading on the NYSE using the procedures described in its then current prospectus (the procedures applicable to the Acquired Funds and their corresponding Acquiring Funds are identical). Each Acquiring Fund will issue to the Acquired Fund a number of shares of each share class with a total value equal to the total value of the net assets of the corresponding share class of the Acquired Fund outstanding at the Effective Time of the Reorganization. Immediately after the Effective Time of the Reorganizations, each Acquired Fund will distribute to its shareholders Acquiring Fund shares of the same class as the Acquired Fund shares you own in exchange for all your Acquired Fund shares of that class. Acquired Fund shareholders will receive a number of full and fractional shares of the Acquiring Fund that are equal in value to the value of the shares of the Acquired Fund that are surrendered in the exchange. In connection with the exchange, the Acquiring Fund will credit on its books an appropriate number of its shares to the account of each Acquired Fund shareholder, and the Acquired Fund will cancel on its books all its shares registered to the account of that shareholder. After the Effective Time of the Reorganization, the Acquired Fund will be dissolved in accordance with applicable law. The consummation of the transactions contemplated by each Plan is subject to the approval of the Plan by the shareholders of the Acquired Fund. The Plans may be amended, but no amendment may be made which in the opinion of the Board of Directors would materially adversely affect the interests of the shareholders of the Acquired Fund after they have approved the Plan. The Board of Directors may terminate a Plan at any time before the Effective Time of the Reorganization if it believes that consummation of the transactions contemplated by the Plan would not be in the best interests of the shareholders. The reorganization of the Equity Income Fund into the Equity Income Fund I will not be effected unless the Equity Income Fund I first acquires substantially all of the assets of the WM Equity Income Fund. Likewise, the reorganization of the Tax-Exempt Bond Fund into the Tax-Exempt Bond Fund I will not be effected unless the Tax-Exempt Bond Fund I first acquires substantially all the assets of the WM Tax-Exempt Bond Fund. Under the Plan, the expenses of the Reorganizations (other than trading costs associated with disposing of any portfolio securities that would not be compatible with the investment objectives and strategies of an Acquiring Fund and reinvesting the proceeds in securities that would be compatible) will be borne by PMC. The portfolio repositioning may result in the realization of taxable capital gains which will be distributed to shareholders of the affected Acquired Fund prior to its Reorganization. Expenses expected to be incurred in connection with the Reorganizations include, but are not limited to, accountants' fees, legal fees, registration fees, printing expenses, transfer taxes (if any) and the fees of banks and transfer agents. If the Plan is not approved by the shareholders of an Acquired Fund or is not consummated for any other reason, the Board will consider other possible courses of action. The Board, including all the Independent Directors, recommends that shareholders approve the Plans under Proposals 1 and 2. Reasons for the Reorganizations The Reorganization will permit PIF to substitute for the Acquired Funds corresponding Acquiring Funds that the Board believes will better serve the interests of shareholders. Each Acquiring Fund is a new fund, which has investment objectives and strategies that are identical to those of its corresponding WM Acquired Fund and are substantially similar to those of its corresponding Acquired Fund. Accordingly, after the Reorganization, it should be reasonable for shareholders to have the same investment expectations. The persons responsible for the day-to-day management of the WM Acquired Funds will be responsible for the day-to-day management of the Acquiring Funds. This is important to keep in mind because, for each of the 1, 5 and 10 year periods ended December 31, 2005, the WM Equity Income Fund has generated performance results that are superior to the returns of the Equity Income Fund. Similarly, the WM Tax-Exempt Bond Fund has produced results that are comparable to or exceed the performance of the Tax-Exempt Bond Fund over the same time periods. Although past performance is no guarantee of future results, it does provide an indication of the risks of investing in the Acquired Funds and their corresponding Acquiring Funds. Moreover, shareholders in each Acquired Fund may benefit from the Acquiring Fund's larger asset base resulting from the addition of the WM Acquired Fund's assets. As a result of the Reorganizations, the Acquiring Funds may have improved prospects for growth, may operate more efficiently and may have greater potential for attendant reductions in overall expenses. Board Consideration of the Reorganizations The Board of Directors, including the Directors who are not "interested persons" (as defined in the 1940 Act) of each Acquired Fund (the "Independent Directors"), considered the Reorganizations at meetings held on August 16, 2006, August 25, 2006 and September 11, 2006. The Board considered information about the Reorganizations presented by PMC, and the Independent Directors were assisted by independent legal counsel and an independent consultant. The Board requested and evaluated such information as it deemed necessary to consider each Reorganization. At the September 11, 2006 meeting, the Board of Directors unanimously approved the Reorganizations after concluding that each Acquired Fund's participation in the Reorganization is in the best interests of each Acquired Fund and that the interests of existing shareholders of each Acquired Fund will not be diluted as a result of the Reorganization. In determining whether to approve each Reorganization and recommend its approval to shareholders, the Board of Directors made inquiry into a number of matters and considered, among others, the following factors, in no order of priority: (1) the substantial similarity of the investment objectives, strategies and risks of the Acquired Fund and its corresponding Acquiring Fund and any changes with respect thereto that will result from the Reorganization; (2) the Acquiring Funds have the same fundamental policies as the Acquired Funds; (3) where applicable, estimated explicit trading costs associated with disposing of any portfolio securities that would not be compatible with the investment objectives and strategies of the Acquiring Fund and reinvesting the proceeds in securities that would be compatible; (4) expense ratios and available information regarding the fees and expenses of the Acquired Fund and its corresponding Acquiring Fund, including information regarding the impact of PMC's agreement to cap the total expenses of each Class A and Class B shares of the Acquiring Funds (through February 28, 2008 in the case of the Equity Income Fund I and through June 30, 2008 in the case of the Tax-Exempt Bond Fund I) so that shareholders of the Acquired Funds will be subject to the same or lower expense ratios than those to which they were subject at June 30, 2006; (5) comparative investment performance of and other information pertaining to the Acquired Fund and the corresponding WM Acquired Fund, which is expected to be the survivor of the Reorganization for accounting and performance reporting purposes; (6) the potential effect on the Acquired Fund's shareholders of investing in a larger asset pool with potentially greater diversification, and the potential effect on the portfolio management of the corresponding Acquiring Fund of such a larger asset base; (7) the differences between the sales charge schedules and types of Rule 12b-1 plans of the Acquired and Acquiring Funds as well as the longer period of time it takes for the Acquiring Fund's Class B shares to convert to Class A shares (see "Additional Information About the Funds - Differences between the Share Classes of the Acquired and Acquiring Funds" below); (8) the sales charge structures and distribution arrangements, including the prospects for growth and for achieving economies of scale, of the Acquired Fund in combination with the corresponding Acquiring Fund as combined with the corresponding WM Acquired Fund; (9) the absence of any material differences in the rights of shareholders of the Acquired Funds and the Acquiring Funds; (10) the financial strength, investment experience and resources of the sub-advisors to the Acquiring Funds; (11) the fact that all costs of the Reorganization, other than trading costs associated with portfolio securities transactions, would be borne by PMC; (12) any direct or indirect benefits expected to be derived by PMC and its affiliates from the Reorganization; (13) the direct or indirect federal income tax consequences of each Reorganization, including the expected tax-free nature of the Reorganization, the impact of any federal income tax loss carryforwards and the estimated capital gain or loss expected to be incurred in connection with disposing of any portfolio securities that would not be compatible with the investment objectives and strategies of the Acquiring Fund, where applicable; (14) the fact that neither Reorganization will result in any dilution of Acquired Fund shareholder values; (15) the terms and conditions of the Plan, including the provision that terminates the Reorganization in the event that the WM Acquired Fund does not first reorganize into the Acquiring Fund pursuant to the related WM Fund Reorganization; and (16) possible alternatives to the Reorganization. The Board's decision to recommend approval of the particular Reorganization was based on a number of factors, including the following: Reorganization of the Equity Income Fund into the Equity Income Fund I (1) it should be reasonable for shareholders to have the same investment expectations after the Reorganization because the investment objectives, policies and risks of the Acquired and Acquiring Fund are substantially similar; (2) WMA, as sub-advisor to the Acquiring Fund, may be expected to provide investment advisory services and personnel of at least the same quality as those provided by Principal Global, the sub-advisor to the Acquired Fund; (3) the WM Equity Income Fund, which has a substantially larger asset base than the Acquired Fund and is expected to be reorganized into the Acquiring Fund pursuant to the related WM Fund Reorganization, has investment objectives and strategies that are identical to those of the Acquiring Fund and has produced performance results that are comparable to those of the Acquired Fund for the one-year period ended June 30, 2006 and significantly outperformed the Acquired Fund over the three- and five-year time periods ended June 30, 2006, although no assurance can be given that the Acquiring Fund will achieve any particular level of performance after the Reorganization; and (4) the Acquiring Fund has a lower advisory fee rate and, with a larger asset base assuming consummation of the related WM Fund Reorganization, is expected to have lower overall expense ratios than the Acquired Fund. Reorganization of the Tax-Exempt Bond Fund into the Tax-Exempt Bond Fund I (1) it should be reasonable for shareholders to have the same investment expectations after the Reorganization because the investment objectives, policies and risks of the Acquired and Acquiring Fund are substantially similar; (2) Van Kampen, as sub-advisor to the Acquiring Fund, may be expected to provide investment advisory services and personnel of at least the same quality as those provided by Principal Global and NAM, the sub-advisors to the Acquired Fund; and (3) the WM Tax-Exempt Bond Fund, which has a larger asset base than the Acquired Fund and is expected to be reorganized into the Acquiring Fund pursuant to the related WM Fund Reorganization, has investment objectives and strategies that are identical to those of the Acquiring Fund and has outperformed the Acquired Fund over the one-, three-, and five-year periods ended June 30, 2006, although no assurance can be given that the Acquiring Fund will achieve any particular level of performance after the Reorganization; and (4) the Acquiring Fund has the same advisory fee rate and is expected to have the same expense ratios as the Acquired Fund as a result of an expense limitation agreement that runs through June 30, 2008. Description of the Securities to Be Issued PIF is a Maryland corporation that is authorized to issue its shares of common stock in separate series and separate classes of series. Each Acquiring Fund is a separate series of PIF, and the Class A and Class B shares of each Acquiring Fund to be issued in connection with each Reorganization, along with the other classes of shares of that Acquiring Fund, represent interests in the assets belonging to that series and have identical dividend, liquidation and other rights, except that expenses allocated to a particular series or class are borne solely by that series or class and may cause differences in rights as described herein. Expenses related to the distribution of, and other identified expenses properly allocated to, the shares of a particular series or class are charged to, and borne solely by, that series or class, and the bearing of expenses by a particular series or class may be appropriately reflected in the net asset value attributable to, and the dividend and liquidation rights of, that series or class. All shares of PIF have equal voting rights and are voted in the aggregate and not by separate series or class of shares except that shares are voted by series or class: (i) when expressly required by Maryland law or the 1940 Act and (ii) on any matter submitted to shareholders which the Board of Directors has determined affects the interests of only a particular series or class. Shares of the Acquiring Funds, when issued, have no cumulative voting rights, are fully paid and non-assessable, have no preemptive or conversion rights and are freely transferable. Each fractional share has proportionately the same rights as are provided for a full share. Federal Income Tax Consequences As a condition to the consummation of the Reorganizations, PIF will have received an opinion from Dykema Gossett PLLC substantially to the effect that, based upon the facts and assumptions stated therein and with respect to each Reorganization, for federal income tax purposes: (1) the Reorganization will constitute a reorganization within the meaning of Section 368(a) of the Code; (2) no gain or loss will be recognized by the Acquired Fund or the Acquiring Fund upon the transfer of the assets and liabilities, if any, of the Acquired Fund to the Acquiring Fund solely in exchange for shares of the Acquiring Fund; (3) no gain or loss will be recognized by shareholders of the Acquired Fund upon the exchange of such Acquired Fund's shares solely for shares of the Acquiring Fund; (4) the holding period and tax basis of the shares of the Acquiring Fund received by each holder of shares of the Acquired Fund pursuant to the Reorganization will be the same as the holding period and tax basis of the shares of the Acquired Fund held by the shareholder (provided the shares of the Acquired Fund were held as a capital asset on the date of the Reorganization) immediately prior to the Reorganization; and (5) the holding period and tax basis of the assets of the Acquired Fund acquired by the Acquiring Fund will be the same as the holding period and tax basis of those assets to the Acquired Fund immediately prior to the Reorganization. Capital Loss Carryforwards. As of October 31, 2005, the Acquired Funds had accumulated capital loss carryforwards in the approximate amounts indicated: Acquired Fund Capital Loss Carryforward ------------- ------------------------- Equity Income Fund $16,398,000 Tax-Exempt Bond Fund -- After the Reorganizations, these loss carryforwards will be available to the corresponding Acquiring Funds to offset their capital gains, although the amounts of offsetting loss carryforwards available in any given year may be limited. As a result of this limitation, it is possible that the corresponding Acquiring Funds may not be able to use these loss carryforwards as rapidly as the Acquired Funds might have, and part of these loss carryforwards may not be useable at all. The ability of each Acquiring Fund to utilize the accumulated capital loss carryforward in the future depends upon a variety of factors that cannot be known in advance, including the existence of capital gains against which these loss carryforwards may be offset. In addition, the benefits of any capital loss carryforward currently are available only to shareholders of the Acquired Fund. After each Reorganization, however, these benefits will inure to the benefit of all shareholders of its corresponding Acquiring Fund. Distribution of Income and Gains. Prior to the Reorganizations, each Acquired Fund whose taxable year will end as a result of the Reorganization generally is required to declare to its shareholders of record one or more distributions of all of its previously undistributed net investment income and net realized capital gain, including capital gains on any securities disposed of in connection with the Reorganization. Such distributions will be made to such shareholders before the Reorganization. An Acquired Fund shareholder will be required to include any such distributions in such shareholder's taxable income. This may result in the recognition of income that could have been deferred or might never have been realized had the Reorganization not occurred. The foregoing is only a summary of the principal federal income tax consequences of the Reorganizations and should not be considered to be tax advice. There can be no assurance that the Internal Revenue Service will concur on all or any of the issues discussed above. You may wish to consult with your own tax advisers regarding the federal, state, and local tax consequences with respect to the foregoing matters and any other considerations which may apply in your particular circumstances. CAPITALIZATION As to each Reorganization, the following tables show as of April 30, 2006: (i) the capitalization of the Acquired Fund; (ii) the capitalization of the WM Acquired Fund that is proposed to be reorganized into the Acquiring Fund pursuant to the related WM Fund Reorganization; (iii) the capitalization of the Acquiring Fund; and (iv) pro forma combined capitalization of the Acquired Fund, the Acquiring Fund and the WM Acquired Fund as if the Reorganization had occurred as of that date. As of April 30, 2006, each of the Acquired Funds had outstanding Class A and Class B shares. Effective September 30, 2006, all outstanding Class R-1 shares of the WM Equity Income Fund were re-designated Class A shares. Each Acquiring Fund will commence operations at the Effective Time of the Reorganization and will first issue its shares in connection with the Reorganization. Net Assets Net Asset Shares Proposal 1 (000s Value Outstanding - ---------- omitted) Per Share (000s omitted) -------- --------- ------------ (1) Equity Income Fund --Class A 96,515 12.39 7,788 (Acquired Fund) --Class B 13,358 12.34 1,083 --Total 109,873 8,871 (2) WM Equity Income Fund --Class A 1,270,674 21.48 59,158 (WM Acquired Fund) --Class B 293,220 21.32 13,752 --Class C 203,788 21.16 9,631 --Class I 1,700,951 21.48 79,175 --Class R-1 279 21.48 13 --Total 3,468,912 161,729 (3) Equity Income Fund I --Class A -- -- -- (Acquiring Fund) --Class B -- -- -- --Class C -- -- -- --Class I -- -- -- (Institutional) -- -- --Total (4) Equity Income Fund I --Class A 1,367,468 21.48 63,664 (Acquiring Fund) --Class B 306,578 21.32 14,379 (Pro forma assuming combination --Class C 203,778 21.16 9,631 of (1), (2) and (3)) --Class I 1,700,951 21.48 79,175 (Institutional) 3,578,785 166,849 --Total Net Assets Net Asset Shares Proposal 2 (000s Value Outstanding - ---------- ----- omitted) Per Share (000s omitted) --------- ------------ (1) Tax-Exempt Bond Fund --Class A 149,074 11.81 12,628 (Acquired Fund) --Class B 7,197 11.88 606 --Total 156,271 13,234 (2) WM Tax-Exempt Bond Fund --Class A 169,423 7.55 22,448 (WM Acquired Fund) --Class B 26,964 7.55 3,572 --Class C 2,752 7.55 365 --Total 199,139 26,385 (3) Tax-Exempt Bond Fund I --Class A -- -- -- (Acquiring Fund) --Class B -- -- -- --Class C -- -- -- --Total -- -- (4) Tax-Exempt Bond Fund I --Class A 318,497 7.55 42,193 (Acquiring Fund) --Class B 34,161 7.55 4,525 (Pro forma assuming combination --Class C 2,752 7.55 365 of (1), (2) and (3)) --Total 355,410 47,083 ADDITIONAL INFORMATION ABOUT THE FUNDS Differences Between the Share Classes of the Acquired and Acquiring Funds The Class A and Class B shares of each Acquired Fund generally have the same rights and preferences as the Class A and Class B shares of the corresponding Acquiring Fund. However, there are differences that you should understand. Each Acquiring Fund will issue in the Reorganization Class A and Class B shares that differ from the Class A and Class B shares of the Acquired Fund. Each class of the Acquired Funds differs from the corresponding class of the Acquiring Funds in that: (i) the Class A shares of each Acquiring Fund have a different front-end sales charge schedule; (ii) the Class B shares of each Acquiring Fund have a different contingent deferred sales charge ("CDSC") schedule; (iii) the Class A and Class B shares of each Acquiring Fund have different Distribution Plans pursuant to Rule 12b-1 under the 1940 Act; and (iv) the Class B shares of the Acquiring Fund convert to Class A shares after different periods. Differences in the Front-End Sales Charge Schedule for Class A Shares. The following tables show the differences in the front-end sales charge schedules for the Class A shares of each Acquired Fund and the Class A shares of its corresponding Acquiring Fund: Equity Income Fund (Acquired Fund) Equity Income Fund I (Acquiring Fund) Sales Charge as a % of: Dealer Allowance as a Sales Charge as a % of: Dealer Allowance as a Amount of Purchase % of Offering Price % of Offering Price ------------------ ------------------- ------------------- Offering Price Amount Invested Offering Amount Invested -------------- --------------- --------- --------------- Price Less than $50,000 5.75% 6.10% 5.00% 5.50% 5.82% 4.75% $50,000 but less 4.75% 4.99% 4.00% 4.75% 4.99% 4.00% than $100,000 $100,000 but less 3.75% 3.90% 3.00% 3.75% 3.90% 3.00% than $250,000 $250,000 but less 2.75% 2.83% 2.25% 3.00% 3.09% 2.50% than $500,000 $500,000 but less 2.00% 2.04% 1.50% 2.00% 2.04% 1.75% than $1,000,000 $1,000,000 or more 0.00% 0.00% 0.75% 0.00% 0.00% 0.00%* Tax-Exempt Bond Fund (Acquired Fund) Tax-Exempt Bond Fund I (Acquiring Fund) ------------------------------------ -------------------------------------- Sales Charge as a % of: Dealer Allowance as a Sales Charge as a % of: Dealer Allowance as a Amount of Purchase % of Offering Price % of Offering Price ------------------ ------------------- ------------------- Offering Price Amount Invested Offering Amount Invested -------------- --------------- --------- --------------- Price Less than $50,000 4.75% 4.99% 4.00% 4.50% 4.71% 4.00% $50,000 but less 4.25% 4.44% 3.75% 4.00% 4.17% 3.50% than $100,000 $100,000 but less 3.75% 3.90% 3.25% 3.50% 3.63% 3.00% than $250,000 $250,000 but less 2.50% 2.56% 2.00% 2.50% 2.56% 2.00% than $500,000 $500,000 but less 1.50% 1.52% 1.25% 2.00% 2.04% 1.75% than $1,000,000 $1,000,000 or more 0.00% 0.00% 0.75% 0.00% 0.00% 0.00%* <FN> * Princor, the distributor for the Acquired and Acquiring Funds, may pay authorized dealers commissions on purchases of Class A shares over $1 million calculated as follows: 1.00% on purchases between $1 million and $3 million, 0.50% on purchases over $3 million but less than $5 million, 0.35% on purchases over $5 million but less than $10 million, and 0.25% on amounts over $10 million. The commission rate is determined based on the purchase amount combined with the current market value of existing investments in Class A, B and C shares. </FN> Differences in CDSC Schedule for Class B Shares. The following tables show the differences among the CDSC schedules for (i) the Class B shares of the Acquired Funds, (ii) the Class B shares of the Acquiring Funds to be issued in connection with the Reorganizations, and (iii) the Class B shares of the Acquiring Funds to be issued after the Reorganizations. For Class B shares issued in connection with the Reorganizations, Princor agreed to a reduced CDSC schedule. For purposes of calculating the CDSC, the length of time you held Class B shares of an Acquired Fund prior to the Reorganization will count toward your holding period for Class B shares of the corresponding Acquiring Fund issued in connection with the Reorganization. Equity Income Fund and Tax-Exempt Bond Fund (Acquired Funds) Certain Sponsored Plans Established After Years Since Purchase Made CDSC as a % of Dollar Amount 02/01/1998 and Before 03/01/2002 ------------------------- ---------------------------- -------------------------------- 2 years or less 4.00% 3.00% More than 2 years, up to 4 years 3.00% 2.00% More than 4 years, up to 5 years 2.00% 1.00% More than 5 years, up to 6 years 1.00% None More than 6 years None None Equity Income Fund I and Tax-Exempt Bond Fund I (Acquiring Funds) (for shares to be issued by the Acquiring Funds in connection with the Reorganizations) Certain Sponsored Plans Established After Years Since Purchase Made CDSC as a % of Dollar Amount 02/01/1998 and Before 03/01/2002 ------------------------- ---------------------------- -------------------------------- 2 years or less 4.00% 3.00% More than 2 years, up to 4 years 2.00% 2.00% More than 4 years, up to 5 years 1.00% 1.00% More than 5 years, up to 6 years 1.00% None More than 6 years None None Equity Income Fund I and Tax-Exempt Bond Fund I (Acquiring Funds) (for shares to be issued by the Acquiring Funds after the Reorganizations) Certain Sponsored Plans Established After Years Since Purchase Made CDSC as a % of Dollar Amount 02/01/1998 and Before 03/01/2002 ------------------------- ---------------------------- -------------------------------- 2 years or less 5.00% 3.00% More than 2 years, up to 3 years 4.00% 2.00% More than 3 years, up to 4 years 3.00% 2.00% More than 4 years, up to 5 years 2.00% 1.00% More than 5 years None None Differences in the Distribution (12b-1) Plans Each of the Acquired Funds has adopted a Distribution Plan under Rule 12b-1 under the 1940 Act (each, a "12b-1 Plan") for the Class A and Class B shares of the Fund, and each of the Acquiring Funds has adopted a 12b-1 Plan for the Class A and Class B shares of the Fund. Under the 12b-1 Plans, each Fund may make payments from its assets attributable to the particular share class to its distributor, Princor, for distribution-related expenses and for providing services to shareholders of that share class. Because Rule 12b-1 fees are ongoing fees, over time they will increase the cost of an investment in the Funds and may cost more than paying other types of sales charges. As shown in the table below, the Acquired and Acquiring Funds have the same maximum annualized Rule 12b-1 distribution and/or service fee (as a percentage of average daily net assets) for each of their Class A and Class B shares: Maximum Annualized Rule 12b-1 Fee Share Class Acquired Funds Acquiring Funds Class A 0.25% 0.25% Class B 1.00% 1.00% The primary difference between the 12b-1 Plans of the Acquired and Acquiring Funds is that the Acquired Funds' 12b-1 Plans are "reimbursement" plans and the Acquiring Funds' 12b-1 Plans are "compensation" plans. Under the Acquiring Fund's 12b-1 Plan, the amounts payable by the Acquiring Funds need not be directly related to expenses. Thus, if Princor's actual expenses are less than the fees it receives, Princor will keep the full amount of the fees. Under the Acquired Fund's 12b-1 Plans, a Fund pays 12b-1 fees only to the extent Princor incurs expenses covered by the Fund's 12b-1 Plan. The effect of this difference is that the Acquiring Funds would pay a higher Rule 12b-1 fee than the Acquired Funds if the dollar amount of authorized expenses under an Acquired Fund's 12b-1 Plan in any given year is less than 0.25% of the average daily net assets attributable to the Fund's Class A shares or less than 1.00% of the average daily net assets attributable to the Fund's Class B shares. The Acquiring Funds have adopted for their Class A and Class B shares 12b-1 Plans that are the same in all material respects as those of the corresponding WM Acquired Funds, which are proposed to be combined with the Acquiring Funds pursuant to the WM Fund Reorganization. The table below shows the amount of 12b-1 fees (expressed as a percentage of average daily net assets) paid by the Acquired Funds and WM Acquired Funds for the last fiscal year. This comparison is designed to assist shareholders in understanding the impact of the difference between the 12b-1 Plans of the Acquired and Acquiring Funds. PIF Equity Income WM Equity Income Fund PIF Tax-Exempt Bond WM Tax-Exempt Bond Fund Fiscal Year Fund Fund Ending 10/31 - ------------------ - ------------------ Class A Class B Class A Class B Class A Class B Class A Class B ------- ------- ------- ------- ------- ------- ------- ------- 2005 0.24% 0.92% 0.25% 1.00% 0.21% 0.40% 0.25% 1.00% The remainder of this section summarizes the terms and features of the 12b-1 Plans of the Acquired and the Acquiring Funds. 12b-1 Plans of the Acquired Funds. For each of the Acquired Funds, the 12b-1 plan for Class A shares provides that the Fund makes payments to Princor to compensate Princor and other selling dealers for providing shareholder services to existing Fund shareholders and rendering assistance in the distribution and promotion of the Class A shares to the public. Each Fund pays Princor a fee after the end of each month at an annual rate no greater than 0.25% of the Fund's average net assets attributable to Class A shares. Princor retains such amounts as are appropriate to compensate for actual expenses incurred in distributing and promoting the sale of the Fund shares to the public but may remit on a continuous basis up to 0.25% to registered representatives and other selected dealers (including for this purpose, certain financial institutions) as a trail fee in recognition of their services and assistance. For each of the Acquired Funds, the 12b-1 Plans for Class B shares provide for payments by the Fund to Princor at the annual rate of up to 1.00% of the Fund's average net assets attributable to Class B shares. Princor also receives the proceeds of any CDSC imposed on redemptions of Class B shares. For each of the Acquired Funds, the 12b-1 Plans for Class A and Class B shares issued authorize Princor to enter into service agreements with other selling dealers and with banks and other financial institutions to provide shareholder services to existing Class A and Class B shareholders, including services such as furnishing information as to the status of shareholder accounts, responding to shareholder written and telephone inquiries and assisting shareholders with tax information. Princor makes payments to dealers on accounts for which such dealer is designated dealer of record. Payments are based on the average net asset value of the accounts invested in Class A and Class B shares. Under the 12b-1 Plans for the shares of the Acquired Funds, a Fund pays 12b-1 fees only to the extent Princor incurs expenses covered by the Fund's 12b-1 Plan. 12b-1 Plans of the Acquiring Funds. Under the 12b-1 Plans for the Class A and Class B shares of the Acquiring Funds, Princor receives a service fee at an annual rate of 0.25% of the average daily net assets of each class. In addition, Princor is paid distribution fees as compensation in connection with the offering and sale of Class B shares at an annual rate of 0.75% of the average daily net assets of such shares. The amounts payable by the Acquiring Funds under the 12b-1 Plans need not be directly related to expenses. If Princor's actual expenses are less than the fees it receives, Princor will keep the full amount of the fees. Service Fees. Princor may pay service fees to dealers and other intermediaries at the annual rate of 0.25% of the average daily net assets of such shares for which they are the dealers of record. To receive service fees from Princor, dealers or other intermediaries must be the dealer of record for shares with average daily net assets of at least $100,000. Class A shares must be held for three months before these fees are paid. In the case of Class B shares, these fees are not paid until such shares have been held for twelve months. Distribution Fees. The proceeds from the distribution fees paid by Class B of the Acquiring Funds, together with any applicable sales charge, are paid to Princor. Princor generally uses distribution fees to finance any activity that is primarily intended to result in the sale of shares. Examples of such expenses include compensation to salespeople and selected dealers (including financing the commission paid to the dealer at the time of the sale), printing of prospectuses and statements of additional information and reports for other than existing shareholders, and preparing and conducting sales seminars. Payments to Investment Representatives and Their Firms. Financial intermediaries market and sell shares of the Acquiring Funds. These financial intermediaries receive compensation from Princor and its affiliates for selling shares of the Funds and/or providing services to the Funds' shareholders. Financial intermediaries may include, among others, broker/dealers, registered investment advisors, banks, pension plan consultants, and insurance companies. Investment representatives who deal with investors on an individual basis are typically associated with a financial intermediary. Princor and its affiliates may fund this compensation from various sources, including any sales charge and/or Rule 12b-1 fee that the Funds pay to Princor. Individual investment representatives may receive some or all of the amounts paid to the financial intermediary with which he or she is associated. Commissions, Finder's Fees, and Ongoing Payments. In the case of Class A shares, all or a portion of the initial sales charge for such shares may be paid by Princor to financial intermediaries selling Class A shares. Princor may pay these financial intermediaries a fee of up to 1.00% on purchases of $1 million or more. Princor may pay financial intermediaries a finder's fee of up to 1.00% on initial investments of $500,000 or more by qualified retirement or benefit plans in omnibus accounts, which are not subject to initial sales charges. Additionally, Princor generally makes ongoing payments to financial intermediaries for services provided to Class A shareholders at an annual rate of 0.25% of average net assets attributable to a shareholder's investment in Class A shares. In the case of Class B shares, Princor will pay, at the time of purchase of such shares, a commission to the purchaser's financial intermediary in an amount equal to 4.00% of the investment. Additionally, Princor generally makes ongoing payments to financial intermediaries for services provided to Class B shareholders at an annual rate of 0.25% of average net assets attributable to a shareholder's investment in Class B shares. Other Payments to Intermediaries. In addition to the commissions paid at the time of sale, ongoing payments, and the reimbursement of costs associated with education, training and marketing efforts, conferences, ticket charges, and other general marketing expenses, some or all of which may be paid to financial intermediaries (and, in turn, to a shareholder's investment representative), Princor and its affiliates, at their expense, currently provide additional payments to financial intermediaries that sell shares of the Funds for distribution services. Although payments made to each qualifying financial intermediary in any given year may vary, such payments will generally not exceed (a) 0.25% of the current year's sales of Fund shares by that financial intermediary and/or (b) 0.25% of average daily net assets of Fund shares serviced by that financial intermediary over the year. Additionally, Princor may provide payments to reimburse directly or indirectly the costs incurred by these financial intermediaries and their associated investment representatives in connection with educational seminars and training and marketing efforts related to the PIF Funds for the firms' employees and/or their clients and potential clients. The costs and expenses associated with these efforts may include travel, lodging, entertainment, and meals. Princor may also provide payment or reimbursement for expenses associated with qualifying dealers' conferences, transactions ("ticket") charges, and general marketing expenses. Differences in Class B Conversion Periods. Class B shares of the PIF Funds, including the Acquired and Acquiring Funds, convert to Class A shares after a specified number of years. This is beneficial to Class B shareholders because Class B shares generally have higher 12b-1 fees and "other expenses" than Class A shares. The Acquired Funds' Class B shares convert to Class A shares seven years after purchase. As described below, the Class B shares to be issued in connection with the Reorganizations and after the Reorganizations have different conversion periods than the Class B shares of the Acquired Funds. Acquiring Fund Shares Issued in Connection with the Reorganizations. Princor has agreed to a reduced conversion period for Class B shares issued in connection with the Reorganizations. Class B shares of the Acquiring Funds issued in connection with the Reorganizations will convert to Class A shares six years after purchase. As a result, if you acquire Class B shares of an Acquiring Fund in the Reorganization, those shares will be subject to that Class' higher 12b-1 fee and "other expenses" for a period that is one year shorter than the period applicable to the Class B shares of the corresponding Acquired Fund. Moreover, the length of time you held Class B shares of an Acquired Fund prior to the Reorganization will count toward your conversion period for the corresponding Acquiring Fund's Class B shares issued in the Reorganization. Acquiring Fund Shares Issued After the Reorganizations. The Class B shares of the Acquiring Fund issued after the Reorganizations will convert to Class A shares eight years after purchase. If you acquire Class B shares after the Reorganizations, those shares will be subject to Class B's higher 12b-1 fee and "other expenses" for a period that is one year longer than the period applicable to the Class B shares of the Acquired Fund. Shareholder Rights There are no material differences between the rights of the holders of the Class A shares of the Acquired Fund and the Acquiring Fund or between the rights of the holders of the Class B shares of the Acquired Fund and the Acquiring Fund. Dividends and Distributions The Equity Income Fund and the Equity Income Fund I declare and distribute dividends from net investment income (which is essentially interest and dividends, if any, earned from securities, minus expenses) on a quarterly basis. The Tax-Exempt Bond Fund declares and distributes dividends from net investment income on a monthly basis. The Tax-Exempt Bond Fund I declares dividends daily and pays them monthly. Payments are made to shareholders of record on the business day prior to the payment date. The payment date for the Equity Income Fund and the Equity Income Fund I is the last business day of March, June, September and December. The payment date for the Tax-Exempt Bond Fund and the Tax-Exempt Bond Fund I is the last business day of each month. The Acquired and Acquiring Funds distribute net realized capital gains, if any, at least annually. Generally, the distribution is made on the fourth business day of December. Payments are made to shareholders of record on the business day prior to the payment date. Generally, unless a shareholder chooses another option, dividends and capital gains distributions are reinvested, without any sales charge, in additional shares of the Acquired or Acquiring Fund from which the distribution is made. Immediately prior to the Effective Time of the Reorganizations, each Acquired Fund will pay a dividend or dividends that, together with all previous dividends, will have the effect of distributing to its shareholders all of its investment company taxable income for taxable years ending on or prior to the Reorganization (computed without regard to any deduction for dividends paid) and all of its net capital gains, if any, realized in taxable years ending on or prior to the Reorganization (after reduction for any available capital loss carryforward). Such dividends will be included in the taxable income of the Acquired Funds' shareholders. Purchases, Redemptions and Exchanges of Shares The purchase, redemption and exchange procedures with respect to shares of the Acquired and Acquiring Funds are the same. Purchases. Shares of the Funds are offered for sale through Princor, a broker-dealer that is also the principal underwriter for PIF, or other dealers which Princor selects. Each Fund's shares are bought and sold at the current share price. The share price of each class of each Fund is calculated each day the New York Stock Exchange ("NYSE") is open (shares are not priced on the days on which the NYSE is closed for trading). The share price is determined at the close of business of the NYSE (normally 3:00 p.m. Central Time). When an order to buy or sell shares is received, the share price used to fill the order is the next price calculated after the order is received. For both Funds, the share price is calculated by: o taking the current market value of the total assets of the Fund o subtracting liabilities of the Fund o dividing the remainder proportionately into the classes of the Fund o subtracting the liability of each class o dividing the remainder by the total number of shares owned in that class. If current market values are not readily available for a security owned by a Fund, its fair value is determined in good faith under procedures established by and under the supervision of the Fund's Board of Directors. Trading in securities on foreign securities exchanges and over-the-counter markets is normally completed well before the close of business on each business day in New York (i.e., a day on which the NYSE is open). In addition, foreign securities trading generally or in a particular country or countries may not take place on all business days in New York. Furthermore, trading may take place in various foreign markets on days which are not business days in New York and on which a Fund's net asset value is not calculated. A Fund calculates its net asset value per class per share, and therefore effects sales, redemptions and repurchases of its shares as of the close of the NYSE once each day on which the NYSE is open. Such calculation may not take place contemporaneously with the determination of the prices of the foreign portfolio securities used in such calculation. Certain securities issued by companies in emerging market countries may have more than one quoted valuation at any point in time. These may be referred to as local price and premium price. The premium price is often a negotiated price that may not consistently represent a price at which a specific transaction can be effected. Each of the Funds has a policy to value such securities at prices at which it is expected those shares may be sold, and PMC or any sub-advisor is authorized to make such determinations subject to the oversight of the Fund's Board as may from time to time be necessary. Redemptions. Shares of each Fund may be redeemed at a price equal to the net asset value of the shares next computed following the receipt of a request for redemption in proper form. The amount you receive will be reduced by any applicable CDSC or excessive trading fee. Generally, the sale proceeds are sent out on the next business day after the sell order has been placed. Payment for shares tendered for redemption is ordinarily made in cash. The Board of Directors may determine, however, that it would be detrimental to the remaining shareholders to make payment of a redemption order wholly or partly in cash. Each of the Funds may, therefore, pay the redemption proceeds in whole or in part by a distribution "in kind" of securities from the Fund's portfolio in lieu of cash. If the Fund pays the redemption proceeds in kind, the redeeming shareholder might incur brokerage or other costs in selling the securities for cash. Each Fund will value securities used to pay redemptions in kind using the same method the Fund uses to value its portfolio securities as described above. The right to require the Funds to redeem their shares may be suspended, or the date of payment may be postponed, whenever: (1) trading on the NYSE is restricted, as determined by the SEC, or the NYSE is closed except for holidays and weekends; (2) the SEC permits such suspension and so orders; or (3) an emergency exists as determined by the SEC so that disposal of securities or determination of net asset value is not reasonably practicable. Exchanges. Class A and Class B shares of each Fund may be exchanged, without payment of a sales charge or a CDSC, for shares of the same class of other PIF Funds. An excessive trading fee may apply, as described below. Excessive Trading Fee. Currently, the Acquired and Acquiring Funds impose an excessive trading fee on redemptions or exchanges of $30,000 or more of Class A or Class B shares redeemed or exchanged within 30 days after they are purchased. The fee is equal to 1.00% of the total redemption amount. The fee is paid to the Funds and is intended to offset the trading costs, market impact and other costs associated with short-term money movement in and out of the Funds. The fee will not be applied to shares acquired in connection with a Reorganization. Frequent Purchases and Redemptions The PIF Funds are not designed for, and do not knowingly accommodate, frequent purchases and redemptions of fund shares by investors. If you intend to trade frequently and/or use market timing investment strategies, you should not purchase these Funds. Frequent purchases and redemptions pose a risk to the Funds because they may: o Disrupt the management of the Funds by (i) forcing the Funds to hold short-term (liquid) assets rather than investing for long-term growth, which results in lost investment opportunities for the Funds; and (ii) causing unplanned portfolio turnover; o Hurt the portfolio performance of the Funds; and o Increase expenses of the Funds due to (i) increased broker-dealer commissions; and (ii) increased recordkeeping and related costs. Certain Funds may be at greater risk of harm due to frequent purchases and redemptions. For example, those Funds that invest in foreign securities may appeal to investors attempting to take advantage of time-zone arbitrage. PIF has adopted procedures to "fair value" foreign securities under certain circumstances, which are intended, in part, to discourage excessive trading of shares of the Funds. The Board of Directors has also adopted policies and procedures with respect to frequent purchases and redemptions of shares of the Funds. The Funds monitor trading activity to identify and take action against abuses. While PIF's policies and procedures are designed to identify and protect against abusive trading practices, there can be no certainty that PIF will identify and prevent abusive trading in all instances. When PIF does identify abusive trading, PIF will apply its policies and procedures in a fair and uniform manner. If PIF is not able to identify such abusive trading practices, the abuses described above may negatively impact the Funds. Currently, the Funds impose an excessive trading fee on redemptions or exchanges of $30,000 or more of Class A or Class B shares redeemed or exchanged within 30 days after they are purchased. The fee is equal to 1.00% of the total redemption amount. The fee is paid to the Funds and is intended to offset the trading costs, market impact and other costs associated with short-term money movement in and out of the Funds. In addition, if PMC, or a Fund, deem frequent trading and redemptions to be occurring, action will be taken that may include, but is not limited to: o Increasing the excessive trading fee to 2%, or such higher amount as may be permitted by law; o Increasing the excessive trading fee period from 30 days to as much as 90 days; o Applying the excessive trading fee to redemptions or exchanges of less than $30,000; o Limiting the number of permissible exchanges available to shareholders identified as "excessive traders"; o Limit exchange requests to be in writing and submitted through the United States Postal Service (in which case, requests for exchanges by fax or telephone will not be accepted); and o Taking such other action as directed by the Fund. The Funds have reserved the right to accept or reject, without prior written notice, any exchange requests. In some instances, an exchange may be completed prior to a determination of abusive trading. In those instances, PIF will reverse the exchange and return the account holdings to the positions held prior to the exchange. PIF will give the shareholder that requested the exchange notice in writing in this instance. VOTING INFORMATION Voting procedures. If you complete and return the enclosed proxy ballot, the persons named as proxies will vote your shares as you indicate or for approval of each matter for which there is no indication. You may revoke your proxy at any time prior to the proxy's exercise by: (i) sending written notice to the Secretary of Principal Investors Fund, Inc. at Principal Financial Group, Des Moines, Iowa 50392-0200, prior to the Meeting; (ii) subsequent execution and return of another proxy prior to the Meeting; or (iii) being present and voting in person at the Meeting after giving oral notice of the revocation to the Chairman of the Meeting. Voting rights. Only shareholders of record at the close of business on October 6, 2006 (the "Record Date") are entitled to vote. The shareholders of each class of shares of an Acquired Fund will vote together on the proposed Reorganization relating to that Fund and on any other matter submitted to such shareholders. You are entitled to one vote on each matter submitted to the shareholders of an Acquired Fund for each share of the Fund that you hold, and fractional votes for fractional shares held. Each Proposal requires for approval the affirmative vote of a "Majority of the Outstanding Voting Securities," which is a term defined in the 1940 Act to mean with respect to an Acquired Fund, the affirmative vote of the lesser of (1) 67% or more of the voting securities of the Fund present at the meeting of the Fund, if the holders of more than 50% of the outstanding voting securities of the Fund are present in person or by proxy, or (2) more than 50% of the outstanding voting securities of the Fund. The number of votes eligible to be cast at the meeting as of the Record Date and other share ownership information are set forth below under the heading "Outstanding Shares and Share Ownership" in this Proxy Statement/Prospectus. Quorum requirements. A quorum must be present at the Meeting for the transaction of business. The presence in person or by proxy of one-third of the shares of an Acquired Fund outstanding at the close of business on the Record Date constitutes a quorum for a meeting of that Fund. Abstentions and broker non-votes (proxies from brokers or nominees indicating that they have not received instructions from the beneficial owners on an item for which the broker or nominee does not have discretionary power) are counted toward a quorum but do not represent votes cast for any issue. Under the 1940 Act, the affirmative vote necessary to approve a Proposal may be determined with reference to a percentage of votes present at the Meeting, which would have the effect of counting abstentions as if they were votes against a Proposal. In the event the necessary quorum to transact business or the vote required to approve a Proposal is not obtained at the Meeting, the persons named as proxies or any shareholder present at the Meeting may propose one or more adjournments of the Meeting in accordance with applicable law to permit further solicitation of proxies. Any such adjournment as to a Proposal or any other matter will require the affirmative vote of the holders of a majority of the shares of the affected Acquired Fund cast at the Meeting. The persons named as proxies and any shareholder present at the Meeting will vote for or against any adjournment in their discretion. Solicitation procedures. PIF intends to solicit proxies by mail. Officers or employees of PIF, PMC or their affiliates may make additional solicitations by telephone, internet, facsimile or personal contact. They will not be specially compensated for these services. Brokerage houses, banks and other fiduciaries may be requested to forward soliciting materials to their principals and to obtain authorization for the execution of proxies. For those services, they will be reimbursed by PMC for their out-of-pocket expenses. PIF has retained the services of a professional proxy soliciting firm, Computershare Fund Services, to assist in soliciting proxies and estimate that the cost of such services will be approximately $_________________. Expenses of the Meetings. The expenses of the Meeting for each Acquired Fund will be treated as an expense related to the Reorganizations and will be paid by PMC. OUTSTANDING SHARES AND SHARE OWNERSHIP The following table shows as of the Record Date the number of Class A and Class B shares of each Acquired Fund outstanding and entitled to vote. Share Number of Shares Acquired Fund Class Outstanding Equity Income Fund Class A Class B Tax-Exempt Bond Fund Class A Class B As of the Record Date, the Directors and officers of PIF together owned less than 1% of the outstanding shares of any class of any Acquired Fund. As of the Record Date, the following persons owned of record, or were known by PIF to own beneficially, 5% or more of the outstanding shares of any class of shares of the Acquired Funds: Share Percentage of Acquired Fund Name/Address of Shareholder Class Ownership Equity Income Fund Class _ Tax-Exempt Bond Fund Class _ FINANCIAL STATEMENTS The financial highlights of the Acquired Funds contained in the PIF Prospectus are incorporated by reference into this Proxy Statement/Prospectus, and the financial statements of the Acquired Funds incorporated by reference into the Statement of Additional Information, have been so incorporated by reference in reliance on the report of Ernst & Young LLP, Independent Registered Public Accounting Firm. The unaudited financial highlights of the Acquired Funds as of April 30, 2006 are incorporated by reference to the Semi-Annual Report to Shareholders of the PIF Funds for the six-month period ended April 30, 2006. LEGAL MATTERS Certain matters concerning the issuance of shares of the Acquiring Funds will be passed upon by Michael D. Roughton, Esq., Counsel to PIF. Certain tax consequences of the Reorganizations will be passed upon by Dykema Gossett PLLC, 400 Renaissance Center, Detroit, Michigan 48243. OTHER MATTERS The Board does not know of any matters to be presented at the Meeting other than those mentioned in this Proxy Statement/Prospectus. If any other matters properly come before the Meeting, the shares represented by proxies will be voted in accordance with the best judgment of the person or persons voting the proxies. PIF is not required to hold annual meetings of shareholders and, therefore, it cannot be determined when the next meeting of shareholders will be held. Shareholder proposals to be presented at any future meeting of shareholders of any PIF Fund must be received by PIF a reasonable time before its solicitation of proxies for that meeting in order for such proposals to be considered for inclusion in the proxy materials related to that meeting. BY ORDER OF THE BOARD OF DIRECTORS October ___, 2006 Des Moines, Iowa It is important that proxies be returned promptly. Therefore, shareholders who do not expect to attend the Meeting in person are urged to complete, sign and date the proxy card and return it in the enclosed envelope. APPENDIX A FORMS OF PLANS OF REORGANIZATION PROPOSAL 1 PLAN OF REORGANIZATION Equity Income Fund I and Equity Income Fund The Board of Directors of Principal Investors Fund, Inc., a Maryland corporation (the "Fund"), deems it advisable that the Equity Income Fund I of the Fund (the "Acquiring Fund") and the Equity Income Fund of the Fund (the "Acquired Fund") engage in the reorganization described below. The Acquired Fund will transfer to the Acquiring Fund, and the Acquiring Fund will acquire from the Acquired Fund, all of the assets of the Acquired Fund on the Closing Date and will assume from the Acquired Fund all of the liabilities of the Acquired Fund in exchange for the issuance of the number of shares of the Acquiring Fund determined as provided in the following paragraphs, which shares will be subsequently distributed pro rata to the shareholders of the Acquired Fund in complete liquidation and termination of the Acquired Fund and in exchange for all of the Acquired Fund's outstanding shares. The Acquired Fund will not issue, sell or transfer any of its shares after the Closing Date, and only redemption requests received by the Acquired Fund in proper form prior to the Closing Date shall be fulfilled by the Acquired Fund. Redemption requests received by the Acquired Fund thereafter will be treated as requests for redemption of those shares of the Acquiring Fund allocable to the shareholder in question. The Acquired Fund will declare to its shareholders of record on or prior to the Closing Date a dividend or dividends which, together with all previous such dividends, shall have the effect of distributing to its shareholders all of its income (computed without regard to any deduction for dividends paid) and all of its net realized capital gains, if any, for the current taxable year through the Closing Date. On the Closing Date, the Acquiring Fund will issue to the Acquired Fund a number of full and fractional shares of each corresponding class of the Acquiring Fund, taken at their then net asset value, having an aggregate net asset value equal to the aggregate value of the net assets of the corresponding class of shares of the Acquired Fund. The aggregate value of the net assets of the Acquired Fund and the Acquiring Fund shall be determined in accordance with the then current Prospectus of the Acquiring Fund as of close of regularly scheduled trading on the New York Stock Exchange on the Closing Date. Class A shares of the Acquiring Fund correspond to Class A shares of the Acquired Fund, and Class B shares of the Acquiring Fund correspond to Class B shares of the Acquired Fund. The transactions contemplated in this Plan shall not be effected unless the Acquiring Fund has previously acquired substantially all the assets of the Equity Income Fund of WM Trust I (the "WM Acquisition") and shall be effected immediately after the WM Acquisition. For purposes of the preceding paragraph, the aggregate net assets of the Acquiring Fund shall mean the aggregate net assets of the Acquiring Fund after the WM Acquisition. The closing of the transactions contemplated in this Plan (the "Closing") shall be held at the offices of Principal Management Corporation, 680 8th Street, Des Moines, Iowa 50392-2080 at 3:00 p.m. Central Time on January 12, 2007, or on such earlier or later date as fund management may determine. The date on which the Closing is to be held as provided in this Plan shall be known as the "Closing Date." In the event that on the Closing Date (a) the New York Stock Exchange is closed for other than customary weekend and holiday closings or (b) trading on said Exchange is restricted or (c) an emergency exists as a result of which it is not reasonably practicable for the Acquiring Fund or the Acquired Fund to fairly determine the value of its assets, the Closing Date shall be postponed until the first business day after the day on which trading shall have been fully resumed or to such other date determined by fund management. As soon as practicable after the Closing, the Acquired Fund shall (a) distribute on a pro rata basis to the shareholders of record of each class of shares of the Acquired Fund at the close of business on the Closing Date the shares of the corresponding class of the Acquiring Fund received by the Acquired Fund at the Closing in exchange for all of the Acquired Fund's outstanding shares, and (b) be liquidated in accordance with applicable law and the Fund's Articles of Incorporation. For purposes of the distribution of shares of the Acquiring Fund to shareholders of the Acquired Fund, the Acquiring Fund shall credit on its books an appropriate number of shares to the account of each shareholder of the Acquired Fund. No certificates will be issued for shares of the Acquiring Fund. After the Closing Date and until surrendered, each outstanding certificate, if any, which, prior to the Closing Date, represented shares of the Acquired Fund, shall be deemed for all purposes of the Fund's Articles of Incorporation and Bylaws to evidence the appropriate number of shares of the Acquiring Fund to be credited on the books of the Acquiring Fund in respect of such shares of the Acquired Fund as provided above. Prior to the Closing Date, the Acquired Fund shall deliver to the Acquiring Fund a list setting forth the assets to be assigned, delivered and transferred to the Acquiring Fund, including the securities then owned by the Acquired Fund and the respective federal income tax bases (on an identified cost basis) thereof, and the liabilities to be assumed by the Acquiring Fund pursuant to this Plan. All of the Acquired Fund's portfolio securities shall be delivered by the Acquired Fund's custodian on the Closing Date to the Acquiring Fund or its custodian, either endorsed in proper form for transfer in such condition as to constitute good delivery thereof in accordance with the practice of brokers or, if such securities are held in a securities depository within the meaning of Rule 17f-4 under the Investment Company Act of 1940, transferred to an account in the name of the Acquiring Fund or its custodian with said depository. All cash to be delivered pursuant to this Plan shall be transferred from the Acquired Fund's account at its custodian to the Acquiring Fund's account at its custodian. If on the Closing Date the Acquired Fund is unable to make good delivery to the Acquiring Fund's custodian of any of the Acquired Fund's portfolio securities because such securities have not yet been delivered to the Acquired Fund's custodian by its brokers or by the transfer agent for such securities, then the delivery requirement with respect to such securities shall be waived, and the Acquired Fund shall deliver to the Acquiring Fund's custodian on or by said Closing Date with respect to said undelivered securities executed copies of an agreement of assignment in a form satisfactory to the Acquiring Fund, and a due bill or due bills in form and substance satisfactory to the custodian, together with such other documents including brokers' confirmations, as may be reasonably required by the Acquiring Fund. This Plan may be abandoned and terminated, whether before or after action thereon by the shareholders of the Acquired Fund and notwithstanding favorable action by such shareholders, if the Board of Directors believe that the consummation of the transactions contemplated hereunder would not be in the best interests of the shareholders of either Fund. This Plan may be amended by the Board of Directors at any time, except that after approval by the shareholders of the Acquired Fund no amendment may be made with respect to the Plan which in the opinion of the Board of Directors materially adversely affects the interests of the shareholders of the Acquired Fund. Except as expressly provided otherwise in this Plan, Principal Management Corporation will pay or cause to be paid all out-of-pocket fees and expenses incurred by the Acquired Fund and the Acquiring Fund in connection with the transactions contemplated under this Plan, including, but not limited to, accountants' fees, legal fees, registration fees, printing expenses, transfer taxes (if any) and the fees of banks and transfer agents. IN WITNESS WHEREOF, each of the parties hereto has caused this Plan to be executed by its President or Vice President as of the ___ day of _________, 2006. PRINCIPAL INVESTORS FUND, INC. PRINCIPAL INVESTORS FUND, INC. on behalf of the following Acquired Fund: on behalf of the following Acquiring Fund: Equity Income Fund Equity Income Fund I By: ________________________________ By: ________________________________ Ralph C. Eucher Michael J. Beer President Executive Vice President Principal Management Corporation agrees to the provisions set forth in the last paragraph of this Plan. PRINCIPAL MANAGEMENT CORPORATION By:_________________________________ Ralph C. Eucher President PROPOSAL 2 PLAN OF REORGANIZATION Tax-Exempt Bond Fund I and Tax-Exempt Bond Fund The Board of Directors of Principal Investors Fund, Inc., a Maryland corporation (the "Fund"), deems it advisable that the Tax-Exempt Bond Fund I of the Fund (the "Acquiring Fund") and the Tax-Exempt Bond Fund of the Fund (the "Acquired Fund") engage in the reorganization described below. The Acquired Fund will transfer to the Acquiring Fund, and the Acquiring Fund will acquire from the Acquired Fund, all of the assets of the Acquired Fund on the Closing Date and will assume from the Acquired Fund all of the liabilities of the Acquired Fund in exchange for the issuance of the number of shares of the Acquiring Fund determined as provided in the following paragraphs, which shares will be subsequently distributed pro rata to the shareholders of the Acquired Fund in complete liquidation and termination of the Acquired Fund and in exchange for all of the Acquired Fund's outstanding shares. The Acquired Fund will not issue, sell or transfer any of its shares after the Closing Date, and only redemption requests received by the Acquired Fund in proper form prior to the Closing Date shall be fulfilled by the Acquired Fund. Redemption requests received by the Acquired Fund thereafter will be treated as requests for redemption of those shares of the Acquiring Fund allocable to the shareholder in question. The Acquired Fund will declare to its shareholders of record on or prior to the Closing Date a dividend or dividends which, together with all previous such dividends, shall have the effect of distributing to its shareholders all of its income (computed without regard to any deduction for dividends paid) and all of its net realized capital gains, if any, for the current taxable year through the Closing Date. On the Closing Date, the Acquiring Fund will issue to the Acquired Fund a number of full and fractional shares of each corresponding class of the Acquiring Fund, taken at their then net asset value, having an aggregate net asset value equal to the aggregate value of the net assets of the corresponding class of shares of the Acquired Fund. The aggregate value of the net assets of the Acquired Fund and the Acquiring Fund shall be determined in accordance with the then current Prospectus of the Acquiring Fund as of close of regularly scheduled trading on the New York Stock Exchange on the Closing Date. Class A shares of the Acquiring Fund correspond to Class A shares of the Acquired Fund, and Class B shares of the Acquiring Fund correspond to Class B shares of the Acquired Fund. The transactions contemplated in this Plan shall not be effected unless the Acquiring Fund has previously acquired substantially all the assets of the Tax-Exempt Bond Fund of WM Trust I (the "WM Acquisition") and shall be effected immediately after the WM Acquisition. For purposes of the preceding paragraph, the aggregate net assets of the Acquiring Fund shall mean the aggregate net assets of the Acquiring Fund after the WM Acquisition. The closing of the transactions contemplated in this Plan (the "Closing") shall be held at the offices of Principal Management Corporation, 680 8th Street, Des Moines, Iowa 50392-2080 at 3:00 p.m. Central Time on January 12, 2007, or on such earlier or later date as fund management may determine. The date on which the Closing is to be held as provided in this Plan shall be known as the "Closing Date." In the event that on the Closing Date (a) the New York Stock Exchange is closed for other than customary weekend and holiday closings or (b) trading on said Exchange is restricted or (c) an emergency exists as a result of which it is not reasonably practicable for the Acquiring Fund or the Acquired Fund to fairly determine the value of its assets, the Closing Date shall be postponed until the first business day after the day on which trading shall have been fully resumed or to such other date determined by fund management. As soon as practicable after the Closing, the Acquired Fund shall (a) distribute on a pro rata basis to the shareholders of record of each class of shares of the Acquired Fund at the close of business on the Closing Date the shares of the corresponding class of the Acquiring Fund received by the Acquired Fund at the Closing in exchange for all of the Acquired Fund's outstanding shares, and (b) be liquidated in accordance with applicable law and the Fund's Articles of Incorporation. For purposes of the distribution of shares of the Acquiring Fund to shareholders of the Acquired Fund, the Acquiring Fund shall credit on its books an appropriate number of shares to the account of each shareholder of the Acquired Fund. No certificates will be issued for shares of the Acquiring Fund. After the Closing Date and until surrendered, each outstanding certificate, if any, which, prior to the Closing Date, represented shares of the Acquired Fund, shall be deemed for all purposes of the Fund's Articles of Incorporation and Bylaws to evidence the appropriate number of shares of the Acquiring Fund to be credited on the books of the Acquiring Fund in respect of such shares of the Acquired Fund as provided above. Prior to the Closing Date, the Acquired Fund shall deliver to the Acquiring Fund a list setting forth the assets to be assigned, delivered and transferred to the Acquiring Fund, including the securities then owned by the Acquired Fund and the respective federal income tax bases (on an identified cost basis) thereof, and the liabilities to be assumed by the Acquiring Fund pursuant to this Plan. All of the Acquired Fund's portfolio securities shall be delivered by the Acquired Fund's custodian on the Closing Date to the Acquiring Fund or its custodian, either endorsed in proper form for transfer in such condition as to constitute good delivery thereof in accordance with the practice of brokers or, if such securities are held in a securities depository within the meaning of Rule 17f-4 under the Investment Company Act of 1940, transferred to an account in the name of the Acquiring Fund or its custodian with said depository. All cash to be delivered pursuant to this Plan shall be transferred from the Acquired Fund's account at its custodian to the Acquiring Fund's account at its custodian. If on the Closing Date the Acquired Fund is unable to make good delivery to the Acquiring Fund's custodian of any of the Acquired Fund's portfolio securities because such securities have not yet been delivered to the Acquired Fund's custodian by its brokers or by the transfer agent for such securities, then the delivery requirement with respect to such securities shall be waived, and the Acquired Fund shall deliver to the Acquiring Fund's custodian on or by said Closing Date with respect to said undelivered securities executed copies of an agreement of assignment in a form satisfactory to the Acquiring Fund, and a due bill or due bills in form and substance satisfactory to the custodian, together with such other documents including brokers' confirmations, as may be reasonably required by the Acquiring Fund. This Plan may be abandoned and terminated, whether before or after action thereon by the shareholders of the Acquired Fund and notwithstanding favorable action by such shareholders, if the Board of Directors believe that the consummation of the transactions contemplated hereunder would not be in the best interests of the shareholders of either Fund. This Plan may be amended by the Board of Directors at any time, except that after approval by the shareholders of the Acquired Fund no amendment may be made with respect to the Plan which in the opinion of the Board of Directors materially adversely affects the interests of the shareholders of the Acquired Fund. Except as expressly provided otherwise in this Plan, Principal Management Corporation will pay or cause to be paid all out-of-pocket fees and expenses incurred by the Acquired Fund and the Acquiring Fund in connection with the transactions contemplated under this Plan, including, but not limited to, accountants' fees, legal fees, registration fees, printing expenses, transfer taxes (if any) and the fees of banks and transfer agents. IN WITNESS WHEREOF, each of the parties hereto has caused this Plan to be executed by its President or Vice President as of the ___ day of _________, 2006. PRINCIPAL INVESTORS FUND, INC. PRINCIPAL INVESTORS FUND, INC. on behalf of the following Acquired Fund: on behalf of the following Acquiring Fund: Tax-Exempt Bond Fund Tax-Exempt Bond Fund I By: ________________________________ By: ________________________________ Ralph C. Eucher Michael J. Beer President Executive Vice President Principal Management Corporation agrees to the provisions set forth in the last paragraph of this Plan. PRINCIPAL MANAGEMENT CORPORATION By:_________________________________ Ralph C. Eucher President APPENDIX B DEBT SECURITY RATINGS Standard & Poor's Ratings Group ("S&P") Commercial Paper: A-1 The rating A-1 is the highest rating assigned by S&P to commercial paper. This designation indicates that the degree of safety regarding timely payment is either overwhelming or very strong. Those issues determined to possess overwhelming safety characteristics are denoted with a plus (+) sign designation. A-2 Capacity for timely payment on issues with this designation is strong. However, the relative degree of safety is not as high for issuers designated "A-1." Bonds: AAA Debt rated AAA has the highest rating assigned by S&P. Capacity to pay interest and repay principal is extremely strong. AA Debt rated AA has a very strong capacity to pay interest and repay principal and differs from the higher rated issues only in small degree. A Debt rated A has a strong capacity to pay interest and repay principal although it is somewhat more susceptible to the adverse effects of changes in circumstances and economic conditions than debt in higher rated categories. BBB Debt rated BBB is regarded as having an adequate capacity to pay interest and repay principal. Whereas it normally exhibits adequate protection parameters, adverse economic conditions or changing circumstances are more likely to lead to a weakened capacity to pay interest and repay principal for debt in this category than in higher rated categories. BB-B-CCC -CC Bonds rated BB, B, CCC and CC are regarded, on balance, as predominantly speculative with respect to the issuer's capacity to pay interest and repay principal in accordance with the terms of the obligations. BB indicates the lowest degree of speculation and CC the highest degree of speculation. While such bonds will likely have some quality and protective characteristics, these are outweighed by large uncertainties or major risk exposures to adverse conditions. D Bonds rated D are in default. The D category is used when interest payments or principal payments are not made on the date due even if the applicable grace period has not expired. The D rating is also used upon the filing of a bankruptcy petition if debt service payments are jeopardized. The ratings set forth above may be modified by the addition of a plus or minus to show relative standing within the major rating categories. Moody's Investors Service, Inc. ("Moody's") Commercial Paper: P-1 The rating P-1 is the highest commercial paper rating assigned by Moody's. Issuers rated P-1 (or related supporting institutions) have a superior capacity for repayment of short-term promissory obligations. P-1 repayment capacity will normally be evidenced by the following characteristics: (1) leading market positions in established industries; (2) high rates of return on funds employed; (3) conservative capitalization structures with moderate reliance on debt and ample asset protection; (4) broad margins in earnings coverage of fixed financial charges and high internal cash generation; and (5) well established access to a range of financial markets and assured sources of alternate liquidity. P-2 Issuers rated P-2 (or related supporting institutions) have a strong capacity for repayment of short-term promissory obligations. This will normally be evidenced by many of the characteristics cited above but to a lesser degree. Earnings trends and coverage ratios, while sound, will be more subject to variation. Capitalization characteristics, while still appropriate, may be more affected by external conditions. Ample alternative liquidity is maintained. Bonds: Aaa Bonds which are rated Aaa by Moody's are judged to be of the best quality. They carry the smallest degree of investment risk and are generally referred to as "gilt edge." Interest payments are protected by a large or by an exceptionally stable margin and principal is secure. While the various protective elements are likely to change, such changes as can be visualized are most unlikely to impair the fundamentally strong position of such issues. Aa Bonds which are rated Aa by Moody's are judged to be of high quality by all standards. Together with the Aaa group, they comprise what are generally known as high grade bonds. They are rated lower than the best bonds because margins of protection may not be as large as in Aaa securities or fluctuation of protective elements may be of greater amplitude or there may be other elements present which make the long-term risks appear somewhat larger than in Aaa securities. A Bonds which are rated A by Moody's possess many favorable investment attributes and are to be considered as upper medium grade obligations. Factors giving security to principal and interest are considered adequate but elements may be present which suggest a susceptibility to impairment sometime in the future. Baa Bonds which are rated Baa by Moody's are considered as medium grade obligations, that is, they are neither highly protected nor poorly secured. Interest payments and principal security appear adequate for the present but certain protective elements may be lacking or may be characteristically unreliable over any great length of time. Such bonds lack outstanding investment characteristics and in fact have speculative characteristics as well. B Bonds which are rated B generally lack characteristics of a desirable investment. Assurance of interest and principal payments or of maintenance and other terms of the contract over any long period of time may be small. Caa Bonds which are rated Caa are of poor standing. Such issues may be in default or there may be present elements of danger with respect to principal or interest. Ca Bonds which are rated Ca represent obligations which are speculative in high degree. Such issues are often in default or have other marked shortcomings. C Bonds which are rated C are the lowest rated class of bonds and issues so rated can be regarded as having extremely poor prospects of ever attaining any real investment standing. Moody's applies numerical modifiers "1," "2" and "3" to certain of its rating classifications. The modifier "1" indicates that the security ranks in the higher end of its generic rating category; the modifier "2" indicates a mid-range ranking; and the modifier "3" indicates that the issue ranks in the lower end of its generic rating category. APPENDIX C CERTAIN INVESTMENT STRATEGIES AND RELATED RISKS OF THE ACQUIRING FUNDS This Appendix provides information about certain investment strategies and related risks of the Acquiring Funds. The Statement of Additional Information contains additional information about investment strategies and their related risks. Securities and Investment Practices Market Volatility. Equity securities include common stocks, preferred stocks, convertible securities, depositary receipts, rights and warrants. Common stocks, the most familiar type, represent an equity (ownership) interest in a corporation. The value of a company's stock may fall as a result of factors directly relating to that company, such as decisions made by its management or lower demand for the company's products or services. A stock's value may also fall because of factors affecting not just the company, but also companies in the same industry or in a number of different industries, such as increases in production costs. The value of a company's stock may also be affected by changes in financial markets that are relatively unrelated to the company or its industry, such as changes in interest rates or currency exchange rates. In addition, a company's stock generally pays dividends only after the company invests in its own business and makes required payments to holders of its bonds and other debt. For this reason, the value of a company's stock will usually react more strongly than its bonds and other debt to actual or perceived changes in the company's financial condition or prospects. Stocks of smaller companies may be more vulnerable to adverse developments than those of larger companies. Fixed-income securities include bonds and other debt instruments that are used by issuers to borrow money from investors. The issuer generally pays the investor a fixed, variable or floating rate of interest. The amount borrowed must be repaid at maturity. Some debt securities, such as zero coupon bonds, do not pay current interest, but are sold at a discount from their face values. Interest Rate Changes. Fixed-income securities are sensitive to changes in interest rates. In general, fixed-income security prices rise when interest rates fall and fall when interest rates rise. Longer term bonds and zero coupon bonds are generally more sensitive to interest rate changes. Credit Risk. Fixed-income security prices are also affected by the credit quality of the issuer. Investment grade debt securities are medium and high quality securities. Some bonds, such as lower grade or "junk" bonds, may have speculative characteristics and may be particularly sensitive to economic conditions and the financial condition of the issuers. Repurchase Agreements and Loaned Securities Although not a principal investment strategy, each of the funds may invest a portion of its assets in repurchase agreements. Repurchase agreements typically involve the purchase of debt securities from a financial institution such as a bank, savings and loan association or broker-dealer. A repurchase agreement provides that the fund sells back to the seller and that the seller repurchases the underlying securities at a specified price on a specific date. Repurchase agreements may be viewed as loans by a fund collateralized by the underlying securities. This arrangement results in a fixed rate of return that is not subject to market fluctuation while the fund holds the security. In the event of a default or bankruptcy by a selling financial institution, the affected fund bears a risk of loss. To minimize such risks, the fund enters into repurchase agreements only with large, well-capitalized and well-established financial institutions. In addition, the value of the securities collateralizing the repurchase agreement is, and during the entire term of the repurchase agreement remains, at least equal to the repurchase price, including accrued interest. Each of the funds may lend its portfolio securities to unaffiliated broker-dealers and other unaffiliated qualified financial institutions. These transactions involve risk of loss to a fund if the counterparty should fail to return such securities to the fund upon demand or if the counterparty's collateral invested by the fund declines in value as a result of investment losses. Reverse Repurchase Agreements A fund may use reverse repurchase agreements to obtain cash to satisfy unusually heavy redemption requests or for other temporary or emergency purposes without the necessity of selling portfolio securities, or to earn additional income on portfolio securities, such as Treasury bills or notes. In a reverse repurchase agreement, a fund sells a portfolio security to another party, such as a bank or broker-dealer, in return for cash and agrees to repurchase the instrument at a particular price and time. While a reverse repurchase agreement is outstanding, a fund will maintain cash and appropriate liquid assets to cover its obligation under the agreement. The fund will enter into reverse repurchase agreements only with parties that the sub-advisor deems creditworthy. Using reverse repurchase agreements to earn additional income involves the risk that the interest earned on the invested proceeds is less than the expense of the reverse repurchase agreement transaction. This technique may also have a leveraging effect on the fund, although the fund's intent to segregate assets in the amount of the repurchase agreement minimizes this effect. Currency Contracts The funds may each enter into forward currency contracts, currency futures contracts and options, and options on currencies for hedging purposes and not as a principal investment strategy. A forward currency contract involves a privately negotiated obligation to purchase or sell a specific currency at a future date at a price set in the contract. A fund will not hedge currency exposure to an extent greater than the aggregate market value of the securities held or to be purchased by the fund (denominated or generally quoted or currently convertible into the currency). Hedging is a technique used in an attempt to reduce risk. If a fund's sub-advisor hedges market conditions incorrectly or employs a strategy that does not correlate well with the fund's investment strategy, these techniques could result in a loss. These techniques may increase the volatility of a fund and may involve a small investment of cash relative to the magnitude of the risk assumed. In addition, these techniques could result in a loss if the other party to the transaction does not perform as promised. There is also a risk of government action through exchange controls that would restrict the ability of the fund to deliver or receive currency. Forward Commitments Although not a principal investment strategy, each of the funds may enter into forward commitment agreements. These agreements call for the Fund to purchase or sell a security on a future date at a fixed price. Each of these Funds may also enter into contracts to sell its investments either on demand or at a specific interval. Warrants Each of the funds may invest in warrants though none of the funds use such investments as a principal investment strategy. A warrant is a certificate granting its owner the right to purchase securities from the issuer at a specified price, normally higher than the current market price. High Yield Securities The Acquiring Funds may invest in debt securities rated lower than BBB by S&P or Baa by Moody's or, if not rated, determined to be of equivalent quality by PMC or the sub-advisor. Such securities are sometimes referred to as high yield or "junk" bonds and are considered speculative. Investment in high yield bonds involves special risks in addition to the risks associated with investment in highly rated debt securities. High yield bonds may be regarded as predominantly speculative with respect to the issuer's continuing ability to meet principal and interest payments. Moreover, such securities may, under certain circumstances, be less liquid than higher rated debt securities. Analysis of the creditworthiness of issuers of high yield securities may be more complex than for issuers of higher quality debt securities. The ability of a fund to achieve its investment objective may, to the extent of its investment in high yield bonds, be more dependent on such credit analysis than would be the case if the fund were investing in higher quality bonds. High yield bonds may be more susceptible to real or perceived adverse economic and competitive industry conditions than higher-grade bonds. The prices of high yield bonds have been found to be less sensitive to interest rate changes than more highly rated investments, but more sensitive to adverse economic downturns or individual corporate developments. If the issuer of high yield bonds defaults, a fund may incur additional expenses to seek recovery. The secondary market on which high yield bonds are traded may be less liquid than the market for higher-grade bonds. Less liquidity in the secondary trading market could adversely affect the price at which a fund could sell a high yield bond and could adversely affect and cause large fluctuations in the daily price of the Fund's shares. Adverse publicity and investor perceptions, whether or not based on fundamental analysis, may decrease the value and liquidity of high yield bonds, especially in a thinly traded market. The use of credit ratings for evaluating high yield bonds also involves certain risks. For example, credit ratings evaluate the safety of principal and interest payments, not the market value risk of high yield bonds. Also, credit rating agencies may fail to change credit ratings in a timely manner to reflect subsequent events. If a credit rating agency changes the rating of a portfolio security held by a fund, the fund may retain the security if PMC or the sub-advisor thinks it is in the best interest of shareholders. Initial Public Offerings ("IPOs") An IPO is a company's first offering of stock to the public. IPO risk is that the market value of IPO shares will fluctuate considerably due to factors such as the absence of a prior public market, unseasoned trading, the small number of shares available for trading and limited information about the issuer. The purchase of IPO shares may involve high transaction costs. IPO shares are subject to market risk and liquidity risk. In addition, the market for IPO shares can be speculative and/or inactive for extended periods of time. The limited number of shares available for trading in some IPOs may make it more difficult for a fund to buy or sell significant amounts of shares without an unfavorable impact on prevailing prices. Investors in IPO shares can be affected by substantial dilution in the value of their shares by sales of additional shares and by concentration of control in existing management and principal shareholders. When a fund's asset base is small, a significant portion of the fund's performance could be attributable to investments in IPOs because such investments would have a magnified impact on the fund. As the fund's assets grow, the effect of the fund's investments in IPOs on the fund's performance probably will decline, which could reduce the fund's performance. Because of the price volatility of IPO shares, a fund may choose to hold IPO shares for a very short period of time. This may increase the turnover of the fund's portfolio and lead to increased expenses to the fund, such as commissions and transaction costs. By selling IPO shares, the fund may realize taxable gains it will subsequently distribute to shareholders. Derivatives To the extent permitted by its investment objectives and policies, each of the funds may invest in securities that are commonly referred to as derivative securities. Generally, a derivative is a financial arrangement, the value of which is derived from, or based on, a security, asset, or market index. Certain derivative securities are described more accurately as index/structured securities. Index/structured securities are derivative securities whose value or performance is linked to other equity securities (such as depositary receipts), currencies, interest rates, indices or other financial indicators (reference indices). Some derivatives, such as mortgage-related and other asset-backed securities, are in many respects like any other investment, although they may be more volatile or less liquid than more traditional debt securities. There are many different types of derivatives and many different ways to use them. Futures and options are commonly used for traditional hedging purposes to attempt to protect a fund from exposure to changing interest rates, securities prices, or currency exchange rates and for cash management purposes as a low-cost method of gaining exposure to a particular securities market without investing directly in those securities. The funds may enter into put or call options, future contracts, options on futures contracts and over-the-counter swap contracts (e.g., interest rate swaps, total return swaps and credit default swaps) for both hedging and non-hedging purposes. Generally, no fund may invest in a derivative security unless the reference index or the instrument to which it relates is an eligible investment for the fund. The return on a derivative security may increase or decrease, depending upon changes in the reference index or instrument to which it relates. The risks associated with derivative investments include: -- the risk that the underlying security, interest rate, market index or other financial asset will not move in the direction PMC or the sub-advisor anticipated; -- the possibility that there may be no liquid secondary market which may make it difficult or impossible to close out a position when desired; --the risk that adverse price movements in an instrument can result in a loss substantially greater than a fund's initial investment; and --the counterparty may fail to perform its obligations. Convertible Securities Convertible securities are fixed-income securities that a fund has the right to exchange for equity securities at a specified conversion price. The option allows the fund to realize additional returns if the market price of the equity securities exceeds the conversion price. For example, the fund may hold fixed-income securities that are convertible into shares of common stock at a conversion price of $10 per share. If the market value of the shares of common stock reached $12, the fund could realize an additional $2 per share by converting its fixed-income securities. Convertible securities have lower yields than comparable fixed-income securities. In addition, at the time a convertible security is issued the conversion price exceeds the market value of the underlying equity securities. Thus, convertible securities may provide lower returns than non-convertible fixed-income securities or equity securities depending upon changes in the price of the underlying equity securities. However, convertible securities permit the fund to realize some of the potential appreciation of the underlying equity securities with less risk of losing its initial investment. The funds treat convertible securities as both fixed-income and equity securities for purposes of investment policies and limitations because of their unique characteristics. The funds may invest in convertible securities without regard to their ratings. Foreign Investing The funds may invest in securities of foreign companies but not as a principal investment strategy. For the purpose of this restriction, foreign companies are: -- companies with their principal place of business or principal office outside the U.S.; and -- companies for which the principal securities trading market is outside the U.S. Foreign companies may not be subject to the same uniform accounting, auditing and financial reporting practices as are required of U.S. companies. In addition, there may be less publicly available information about a foreign company than about a U.S. company. Securities of many foreign companies are less liquid and more volatile than securities of comparable U.S. companies. Commissions on foreign securities exchanges may be generally higher than those on U.S. exchanges, although each fund seeks the most favorable net results on its portfolio transactions. Foreign markets also have different clearance and settlement procedures than those in U.S. markets. In certain markets there have been times when settlements have been unable to keep pace with the volume of securities transactions, making it difficult to conduct these transactions. Delays in settlement could result in temporary periods when a portion of fund assets is not invested and earning no return. If a fund is unable to make intended security purchases due to settlement problems, the fund may miss attractive investment opportunities. In addition, a fund may incur a loss as a result of a decline in the value of its portfolio if it is unable to sell a security. With respect to certain foreign countries, there is the possibility of expropriation or confiscatory taxation, political or social instability, or diplomatic developments that could affect a fund's investments in those countries. In addition, a fund may also suffer losses due to nationalization, expropriation or differing accounting practices and treatments. Investments in foreign securities are subject to laws of the foreign country that may limit the amount and types of foreign investments. Changes of governments or of economic or monetary policies, in the U.S. or abroad, changes in dealings between nations, currency convertibility or exchange rates could result in investment losses for a fund. Finally, even though certain currencies may be convertible into U.S. dollars, the conversion rates may be artificial relative to the actual market values and may be unfavorable to fund investors. Foreign securities are often traded with less frequency and volume, and therefore may have greater price volatility, than is the case with many U.S. securities. Brokerage commissions, custodial services, and other costs relating to investment in foreign countries are generally more expensive than in the U.S. Though the funds intend to acquire the securities of foreign issuers where there are public trading markets, economic or political turmoil in a country in which a fund has a significant portion of its assets or deterioration of the relationship between the U.S. and a foreign country may negatively impact the liquidity of a fund's portfolio. A fund may have difficulty meeting a large number of redemption requests. Furthermore, there may be difficulties in obtaining or enforcing judgments against foreign issuers. A fund may choose to invest in a foreign company by purchasing depositary receipts. Depositary receipts are certificates of ownership of shares in a foreign-based issuer held by a bank or other financial institution. They are alternatives to purchasing the underlying security but are subject to the foreign securities to which they relate. Investments in companies of developing countries may be subject to higher risks than investments in companies in more developed countries. These risks include: -- increased social, political and economic instability; -- a smaller market for these securities and low or nonexistent volume of trading that results in a lack of liquidity and in greater price volatility; -- lack of publicly available information, including reports of payments of dividends or interest on outstanding securities; -- foreign government policies that may restrict opportunities, including restrictions on investment in issuers or industries deemed sensitive to national interests; -- relatively new capital market structure or market-oriented economy; -- the possibility that recent favorable economic developments may be slowed or reversed by unanticipated political or social events in these countries; -- restrictions that may make it difficult or impossible for the fund to vote proxies, exercise shareholder rights, pursue legal remedies, and obtain judgments in foreign courts; and -- possible losses through the holding of securities in domestic and foreign custodial banks and depositories. In addition, many developing countries have experienced substantial, and in some periods, extremely high rates of inflation for many years. Inflation and rapid fluctuations in inflation rates have had and may continue to have negative effects on the economies and securities markets of those countries. Repatriation of investment income, capital and proceeds of sales by foreign investors may require governmental registration and/or approval in some developing countries. A fund could be adversely affected by delays in or a refusal to grant any required governmental registration or approval for repatriation. Further, the economies of developing countries generally are heavily dependent upon international trade and, accordingly, have been and may continue to be adversely affected by trade barriers, exchange controls, managed adjustments in relative currency values and other protectionist measures imposed or negotiated by the countries with which they trade. Small and Medium Capitalization Companies The Equity Income Fund I may hold securities of small and medium capitalization companies. Market capitalization is defined as total current market value of a company's outstanding common stock. Investments in companies with smaller market capitalizations may involve greater risks and price volatility (wide, rapid fluctuations) than investments in larger, more mature companies. Small companies may be less significant within their industries and may be at a competitive disadvantage relative to their larger competitors. While smaller companies may be subject to these additional risks, they may also realize more substantial growth than larger or more established companies. Smaller companies may be less mature than larger companies. At this earlier stage of development, the companies may have limited product lines, reduced market liquidity for their shares, limited financial resources or less depth in management than larger or more established companies. Unseasoned issuers are companies with a record of less than three years continuous operation, including the operation of predecessors and parents. Unseasoned issuers by their nature have only a limited operating history that can be used for evaluating the company's growth prospects. As a result, investment decisions for these securities may place a greater emphasis on current or planned product lines and the reputation and experience of the company's management and less emphasis on fundamental valuation factors than would be the case for more mature growth companies. Temporary Defensive Measures From time to time, as part of its investment strategy, each fund may invest without limit in cash and cash equivalents for temporary defensive purposes in response to adverse market, economic or political conditions. To the extent that a fund is in a defensive position, it may lose the benefit of upswings and limit its ability to meet its investment objective. For this purpose, cash equivalents include: bank notes, bank certificates of deposit, bankers' acceptances, repurchase agreements, commercial paper, and commercial paper master notes which are floating rate debt instruments without a fixed maturity. In addition, a fund may purchase U.S. government securities, preferred stocks and debt securities, whether or not convertible into or carrying rights for common stock. There is no limit on the extent to which the funds may take temporary defensive measures. In taking such measures, a fund may fail to achieve its investment objective. Portfolio Turnover "Portfolio Turnover" is the term used in the industry for measuring the amount of trading that occurs in a fund's portfolio during the year. For example, a 100% turnover rate means that on average every security in the portfolio has been replaced once during the year. Funds with high turnover rates (more than 100%) often have higher transaction costs (that are paid by the fund) that may have an adverse impact on fund performance and may generate short-term capital gains (on which taxes may be imposed even if no shares of the fund are sold during the year). Please consider all the factors when you compare the turnover rates of different funds. A fund with consistently higher total returns and higher turnover rates than another fund may actually be achieving better performance precisely because the managers are active traders. You should also be aware that the "total return" line in the Financial Highlights section already includes portfolio turnover costs. APPENDIX D COSTS OF INVESTING IN THE ACQUIRING FUNDS This Appendix describes the sales charges, contingent deferred sales charges ("CDSCs"), and redemption and exchange fees that apply variously to the Class A and Class B shares of the Acquiring Funds. Shareholder Fees (fees paid directly from your investment) The following table describes the fees and expenses you may pay if you buy and hold shares of the Acquiring Funds. Equity Income Fund I Tax-Exempt Bond Fund I Class A Class B Class A Class B Maximum sales charge imposed on purchases 5.50%(1) None 4.50%(1) None (as a % of offering price): Maximum Contingent Deferred Sales Charge 1.00%(2) 5.00%(3) 1.00%(2) 5.00%(3) (CDSC) (as a % of dollars subject to charge): Redemption or Exchange Fee 1.00%(4) 1.00%(4) 1.00%(4) 1.00%(4) (as a % of amount redeemed/exchanged): <FN> - ------------------ (1) Sales charges are reduced or eliminated for purchases of $50,000 or more. See "Front-end Sales Charge - Class A shares." (2) A CDSC may apply on certain redemptions made within 18 months following purchases of $1 million or more made without a sales charge. (3) This maximum CDSC applies to Class B shares issued after the Reorganizations. The CDSCs applicable to these Class B shares are reduced after two years and eliminated after five years. The maximum CDSC applicable to Class B shares issued in the Reorganizations is 4.00%. The CDSCs applicable to these Class B shares are reduced after two years and eliminated after six years. (4) Excessive trading fees are charged when $30,000 or more of shares are redeemed or exchanged to another PIF Fund within 30 days after they are purchased. Excessive trading fees will not be applied to shares acquired pursuant to the Reorganization. </FN> Fees and expenses are important because they lower your earnings. However, low costs do not guarantee higher earnings. For example, a fund with no front-end sales charge may have higher ongoing expenses than a fund with such a sales charge. One-Time Fees o You may pay a one-time sales charge for each purchase (Class A shares) or redemption (Class B shares). o Class A shares may be purchased at a price equal to the share price plus an initial sales charge. Investments of $1 million or more of Class A shares are sold without an initial sales charge but may be subject to a CDSC at the time of redemption. o Class B shares have no initial sales charge but may be subject to a CDSC. If you sell (redeem) shares and the CDSC is imposed, it will reduce the amount of sales proceeds. o An excessive trading fee* of 1.00% is charged on redemptions or exchanges of Class A, Class B or Class C shares of $30,000 or more if the shares were purchased within 30 days of the redemption or exchange. The fee does not apply to redemptions made: through a periodic withdrawal plan; due to a shareholder's death or disability (as defined in the Internal Revenue Code); or to satisfy minimum distribution rules imposed by the Internal Revenue Code. The fee is calculated as a percentage of market value of the shares redeemed at the time of redemption. * The excessive trading fee does not apply to shares redeemed/exchanged from the PIF Money Market Fund. Choosing a Share Class Class A, B and C Shares. You may purchase Class A, Class B or Class C shares of each Fund with certain limitations.* Your decision to purchase a particular class depends on a number of factors including: o the dollar amount you are investing; o the amount of time you plan to hold the investment; and o any plans to make additional investments in the Principal Investors Funds. *--If you are making an initial purchase of the Funds of $100,000 or more and have selected Class B shares, the purchase will be of Class A shares of the Fund(s) you have selected. --If you are making a subsequent purchase into your existing Class B share accounts and the amount of the purchase combined with the value of your Class A, Class B, and Class C share accounts reaches $100,000 or more, the subsequent investment will be applied to purchase Class A shares of the Fund(s) you have selected. In addition, you might consider: o Class A shares if you are making an investment that qualifies for a reduced sales charge; o Class B shares if you prefer not to pay an initial sales charge and you plan to hold your investment for at least five years; or o Class C shares if you do not intend to own the shares for a long period of time. Class A Shares o You generally pay a sales charge on an investment in Class A shares, which varies based on the amount invested and the Fund selected. o If you invest $50,000 or more, the sales charge is reduced. o You are not assessed a sales charge on purchases of Class A shares of $1 million or more. A deferred sales charge may be imposed if you sell those shares within 18 months of purchase. o Class A shares generally have lower annual operating expenses than Class B shares. o You might be eligible for a reduced sales charge. See "Sales Charge waiver or redemption (Class A shares)." o Sales charges might be reduced under the rights of accumulation or statement of intention as described below. Class B Shares o You do not pay a sales charge on an investment in Class B shares. o If you sell your Class B shares within five years from the date of purchase (six years in the case of Class B shares acquired in the Reorganizations), you may pay a deferred sales charge. o If you keep your Class B shares for eight years (six years in the case of Class B shares acquired in the Reorganizations), your Class B shares automatically convert to Class A shares without a charge. o Class B shares generally have higher annual operating expenses and pay lower dividends than Class A shares. o Class B shares may not be suitable for large investments. Due to the higher expenses associated with Class B shares, it may be more advantageous for investors currently purchasing, intending to purchase or with existing assets in amounts that may qualify for a reduced sales charge on Class A shares, including through rights of accumulation and/or a statement of intention, to purchase Class A shares. Class C Shares o You do not pay a sales charge on an investment in Class C shares. o If you sell your Class C shares within 12 months of purchase, you may pay a deferred sales charge. o Unlike Class B shares, Class C shares do not convert to Class A shares and thus the distribution fee is not reduced over time. o Class C shares may not be suitable for large investments. Due to the higher expenses associated with Class C shares, it may be more advantageous for investors currently purchasing, intending to purchase or with existing assets in amounts that may qualify for a reduced sales charge on Class A shares, including through rights of accumulation and/or a statement of intention, to purchase Class A shares. Front-End Sales Charge: Class A Shares Class A shares of the Acquiring Funds are purchased with a sales charge that is a variable percentage based on the amount of the purchase. There is no sales charge on shares of an Acquiring Fund purchased with reinvested dividends or other distributions. Your sales charge may be reduced for larger purchases as indicated below. Equity Income Fund I Sales Charge as % of Offering Amount Dealer Allowance Amount of Purchase Price Invested as % of Offering Price Less than $50,000 5.50% 5.82% 4.75% $50,000 but less than $100,000 4.75% 4.99% 4.00% $100,000 but less than $250,000 3.75% 3.90% 3.00% $250,000 but less than $500,000 3.00% 3.09% 2.50% $500,000 but less than $1,000,000 2.00% 2.04% 1.75% $1,000,000 or more 0.00% 0.00% 0.00%* Tax-Exempt Bond Fund I Sales Charge as % of Offering Amount Dealer Allowance Amount of Purchase Price Invested as % of Offering Price Less than $50,000 4.50% 4.71% 4.00% $50,000 but less than $100,000 4.00% 4.17% 3.50% $100,000 but less than $250,000 3.50% 3.63% 3.00% $250,000 but less than $500,000 2.50% 2.56% 2.00% $500,000 but less than $1,000,000 2.00% 2.04% 1.75% $1,000,000 or more 0.00% 0.00% 0.00%* -------------------- * Princor, the distributor for the Acquired and Acquiring Funds, may pay authorized dealers commissions on purchases of Class A shares over $1 million calculated as follows: 1.00% on purchases between $1 million and $3 million, 0.50% on purchases over $3 million but less than $5 million, 0.35% on purchases over $5 million but less than $10 million, and 0.25% on amounts over $10 million. The commission rate is determined based on the purchase amount combined with the current market value of existing investments in Class A, B and C shares. There is no front-end sales charge on an investment of $1 million or more in Class A shares. There may be a CDSC on shares sold within 18 months of the purchase date. The CDSC does not apply to shares purchased with reinvested dividends or other distributions. The CDSC is calculated as 1.00% of the lesser of the market value at the time of the redemption or the initial purchase price of the shares sold. The CDSC is waived on shares sold: o to satisfy IRS minimum distribution rules; and o using a periodic withdrawal plan. (You may sell up to 1% per month (measured cumulatively for non-monthly plans) of the value of the Fund account at the time, and beginning on the date, the periodic withdrawal plan is established, without paying the CDSC.) In the case of selling some, but not all, of the shares in an account, the shares not subject to a CDSC are redeemed first. Other shares are redeemed in the order purchased (first in, first out). Shares subject to the CDSC which are exchanged from one PIF Fund to another continue to be subject to the CDSC until the CDSC expires. Broker-dealers that sell PIF Fund shares are paid a certain percentage of the sales charge in exchange for their services. At the option of Princor Financial Services Corporation ("Princor"), the amount paid to a dealer may be more or less than that shown in the chart above. The amount paid depends on the services provided. Amounts paid to dealers on purchases without a front-end sales charge are determined by and paid for by Princor. Dealers may charge their customers a processing or service fee in connection with the purchase or redemption of Fund shares. The amount and applicability of such a fee is determined and disclosed to its customers by each individual dealer. Processing or service fees typically are fixed, nominal dollar amounts and are in addition to the sales and other charges described herein. Princor may, from time-to-time, at its expense or through use of amounts it receives from a Fund through a distribution plan adopted pursuant to Rule 12b-1 of the Investment Company Act of 1940, if applicable, pay a bonus or other consideration or incentive to dealers who have sold or may sell significant amounts of shares. Any such bonus or incentive program will not change the price paid by investors for the purchase of the Funds' shares or the amount that any particular Fund receives as the proceeds from such sales. In addition, Princor or its affiliates may provide financial support to dealers that sell shares of the Funds. This support is based primarily on the amount of sales of fund shares and/or total assets in the Funds. The amount of support may be affected by total sales; net sales; levels of redemptions; the dealers' support of, and participation in, Princor's marketing programs and the extent of a dealer's marketing programs relating to the Funds. Financial support to dealers may be made from payments from Princor's resources, from its retention of underwriting concessions and, in the case of share classes that have 12b-1 fees, from payments to Princor under such plans. Sales Charge Waiver Or Reduction (Class A Shares) Class A shares of the Funds may be purchased without a sales charge or at a reduced sales charge. The Funds reserve the right to change or stop offering shares in this manner at any time for new accounts and with a 60-day notice to shareholders of existing accounts. Waiver of sales charge (Class A shares) A Fund's Class A shares may be purchased without a sales charge: o by its current and former Directors, member companies of the Principal Financial Group, and their employees, officers, directors (active or retired), brokers or agents. This also includes their immediate family members (spouse, domestic partner, children (regardless of age) and parents) and trusts for the benefit of these individuals; o by the Premier Credit Union; o by non-ERISA clients of Principal Global Investors LLC; o by any employee or registered representative (and their immediate family members and employees) of an authorized broker-dealer or company that has entered into a selling agreement with Princor; o through a "wrap account" offered by Princor or through broker-dealers, investment advisors and other financial institutions that have entered into an agreement with Princor which includes a requirement that such shares be sold for the benefit of clients participating in a "wrap account" or similar program under which clients pay a fee to the broker-dealer, investment advisor or financial institution; o to fund non-qualified plans administered by a member company of the Principal Financial Group pursuant to a written service agreement; o to the extent that the purchase proceeds represent a distribution from a terminating 401(a) plan, if (1) such purchase is made through a representative of Princor, the terminating plan is not administered by a member company of the Principal Financial Group, and the employer or plan trustee has entered into a written agreement with Princor permitting the group solicitation of active employees and/or plan participants, or (2) such purchase is made through a registered representative of a broker-dealer other than Princor, the purchase proceeds represent a distribution from any terminating 401(a) plan and the employer or plan trustee has entered into a written agreement with Princor permitting the group solicitation of active employees and/or plan participants. Such purchases are subject to the CDSC which applies to purchases of $1 million or more as described above; o by any investor who buys Class A shares through an omnibus account with certain financial intermediaries, such as a bank or other financial institution, that does not accept or charge the initial sales charges. In addition, the CDSC will not be imposed on redemptions of shares purchased through such omnibus accounts to the extent that no sales charge payments were advanced for purchases made through these entities; o by employees of Boston Financial Data Services and PFPC, Inc. and their immediate family members; o by current and retired Washington Mutual employees and their immediate family members, including children up to age 25; o by current or former Washington Mutual employees who establish IRAs involving assets from a Washington Mutual retirement or benefit plan, and subsequent investments into such accounts; o by participants in, or by purchases through, employer-sponsored retirement or benefit plans which were eligible to purchase shares without payment of a sale charge of an Acquired Fund prior to the Combination Date; and o by clients of registered investment advisors that have entered into arrangements with Princor providing for the shares to be used in particular investment products made available to such clients and for which such registered investment advisors may charge a separate fee. Reduction of sales charge (Class A shares) (1) Dollar amount of purchase. The sales charge varies with the size of your purchase. Purchases made by you, your spouse or domestic partner, or the children of you, your spouse or domestic partner under the age of 25 and/or a trust primarily for the benefit of such persons (together "a Qualified Purchaser") will be combined along with Class A, B, and C shares of PIF owned by such persons, to determine the applicable sales charge. Reduced charges apply to the total of PIF Funds" (excluding Money Market Fund) shares purchased (and still owned) by any Qualified Purchaser. If the total amount being invested in PIF Funds is near a sales charge breakpoint, you should consider increasing the amount invested to take advantage of a lower sales charge. (2) Statement of Intention ("SOI"). Qualified Purchasers may obtain reduced sales charges by signing an SOI. The SOI is a nonbinding obligation on the Qualified Purchaser to purchase the full amount indicated in the SOI. The sales charge is based on the total amount to be invested in a 13 month period (24 months if the intended investment is $1 million or more). If the intended investment is not made, sufficient shares will be sold to pay the additional sales charge due. A 401(a) plan trustee must submit the SOI at the time of the first plan purchase. (3) Rights of accumulation. The Class A, Class B, and Class C accounts already owned by a Qualified Purchaser are added to the amount of the new purchase to determine the applicable sales charge percentage. The balance of the existing accounts as of the date of the subsequent purchase(s) is used in this calculation. Class A shares of the Money Market Funds are not included in the calculation unless they were acquired in exchange for other PIF Fund shares. (4) Certain Qualified Plans. The sales charge tables below apply to purchases of Class A shares by qualified plans administered by Expertplan, Inc. that were previously converted from B share plans. Equity Income Fund I Sales Charge as % of Offering Net Amount Dealer Allowance Amount of Purchase Price Invested as % of Offering Price Less than $500,000 2.75% 2.83% 2.25% $500,000 but less than $1,000,000 2.00% 2.04% 1.50% $1,000,000 or more no sales charge 0.75% Sales Charge: Class B shares No front-end sales charge applies to the purchase of Class B shares. However, a CDSC may be imposed on Class B shares sold within five years of purchase (six years in the case of Class B shares acquired in the Reorganizations). Class B shares automatically convert into Class A shares (based on share prices, not number of shares) eight years (five years for certain sponsored plans and six years in the case of Class B shares acquired in the Reorganizations) after purchase. Class B shares provide you the benefit of putting all your dollars to work from the time of investment, but (until conversion) have higher ongoing fees and lower dividends than Class A shares. The Class B share CDSC, if any, is determined by multiplying the lesser of the market value at the time of redemption or the initial purchase price of the shares sold by the appropriate percentage from the table below: Years Since Purchase Payments Made CDSC as a % of Dollar Amount - ---------------------------------- ---------------------------- For shares to be issued For shares to be issued after the Reorganization in the Reorganization 2 years or less 5.00% 4.00% More than 2 years, up to 3 years 4.00% 2.00% More than 3 years, up to 4 years 3.00% 2.00% More than 4 years, up to 5 years 2.00% 1.00% More than 5 years, up to 6 years None 1.00% More than 6 years None None The CDSC does not apply to shares purchased with reinvested dividends or other distributions. The CDSC is not charged on exchanges. However, the original purchase date of the exchanged shares is used to determine if the newly acquired shares are subject to the CDSC when sold. The Fund from which the shares are sold is used to determine the percentage of CDSC, if any. In the case of selling some but not all of the shares in an account, the shares not subject to a sales charge are redeemed first. Other Class B shares are redeemed in the order purchased (first in, first out). Using a periodic withdrawal plan, you may sell up to 1% per month (measured cumulatively for non-monthly plans) of the value of the Fund account at the time, and beginning on the date, the periodic withdrawal plan is established, without paying the CDSC. Waiver of the Sales Charge (Class B shares) The CDSC is waived on Class B shares which are sold: o due to a shareholder's death; o due to the shareholder's disability, as defined in the Internal Revenue Code; o from retirement plans to satisfy minimum distribution rules under the Code; o to pay surrender charges; o to pay retirement plan fees; o involuntarily from small balance accounts; o through a systematic withdrawal plan (certain limits apply); o from a retirement plan to assure the plan complies with Sections 401(k), 401(m), 408(k) or 415 of the Code. NOTE: To have your Class B CDSC waived, you must let your advisor or the Fund know at the time you redeem shares that you qualify for such a waiver. Class B shares are not available to qualified retirement plans. Ongoing Fees Each Fund pays ongoing fees to PMC, Princor and others who provide services to the Fund. They reduce the value of each share you own. Distribution (12b-1) Fees Each of the Acquiring Funds has adopted a Distribution Plan under Rule 12b-1 under the 1940 Act. Under the Plan, the Fund pays a fee to Princor based on the average daily net asset value of the Fund. These ongoing fees pay distribution and other expenses for the sale of Fund shares and for services provided to shareholders. Because they are ongoing fees, over time they will increase the cost of your investment and may cost you more than paying other types of sales charges. Maximum Annualized 12b-1 Fee Class A shares 0.25% Class B shares 1.00% APPENDIX E ADDITIONAL INFORMATION ABOUT FUND PERFORMANCE PROPOSAL 1 The following tables contain additional information with respect to the performance of the PIF Equity Income Fund and the WM Equity Income Fund. Both the PIF Equity Income Fund and the WM Equity Income Fund are proposed to be combined into the Equity Income Fund I, the Acquiring Fund in the Reorganization. Assuming the related WM Fund Reorganization is consummated, the Acquiring Fund will report the historical performance information of WM Equity Income Fund as its own. PIF Equity Income Fund Class A and Class B shares began operations on June 30, 2005 when the Fund succeeded to the operations, and assumed the historical performance of the Class A and Class B shares of a predecessor fund. The bar chart below shows how the Fund's total return has varied year-by-year, while the table below shows performance of Class A and Class B shares over time (along with the returns of a broad-based market index and an index of funds with similar investment objectives for reference). This information may help provide an indication of the Fund's risks. Past performance does not indicate future results. Year-By-Year Total Return (%) as of 12/31 Each Year [INSERT BAR CHART] - ------ ------- ------- ------- ------ -------- ------- ------- ------- ------- 4.56 29.58 22.50 2.25 18.23 -28.20 -12.73 13.62 17.35 8.23 - ------ ------- ------- ------- ------ -------- ------- ------- ------- ------- - ------ ------- ------- ------- ------ -------- ------- ------- ------- ------- 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 - ------ ------- ------- ------- ------ -------- ------- ------- ------- ------- The year-to-date return as of June 30, 2006 is 6.89% Highest return for a quarter during the period of the bar chart above: Q4 '97 19.24% Lowest return for a quarter during the period of the bar chart above: Q3 '01 -17.03% The bar chart above shows year-by-year total returns for the Class A shares. For periods prior to the first full calendar year of operations of the Fund's Class A shares, the annual returns are based on the performance of the Fund's Class A shares of the Fund's predecessor fund. The annual returns in the bar chart do not reflect sales charges; if sales charges were reflected, results would be lower. Each class of shares of the Fund invests in the same portfolio of securities, and the annual returns of each class will differ only to the extent the classes do not have the same expenses. The performance table below shows, for the indicated periods, the average annual total returns for the Class A and Class B shares. For periods prior to the date on which those classes succeeded to the operations of the Class A and Class B shares of the Fund's predecessor fund, the returns of the Class A and Class B shares of the Fund are based on the performance of the Class A and Class B shares of the predecessor fund. The predecessor fund's Class A shares commenced operations on December 16, 1992, and its Class B shares commenced operations on December 9, 1994. Average Annual Total Returns (%) for periods ended December 31, 2005 1 Year 5 Years 10 Years Class A (before taxes) 2.02 -3.14 5.51 (after taxes on distributions) 1.15 -3.98 3.89 (after taxes on distributions and sale 1.58 -3.07 4.05 of shares) Class B 3.10 -3.20 5.55 Russell 1000 Value Index 7.05 5.28 10.94 Morningstar Large Value Category Average 5.88 3.96 8.85 Index performance does not reflect deductions for fees, expenses or taxes. After-tax returns are shown for Class A shares only and would be different for Class B shares. They are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor's tax situation , may differ from those shown, and are not relevant to investors who hold Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns for other share classes will vary. WM Equity Income Fund The bar chart and tables below provide some indication of the risks of investing in the Fund by showing changes in performance from year to year and showing how the Fund's average annual returns compare with those of a broad measure of market performance. The Fund's past performance is not necessarily an indication of how the Fund will perform in the future. Year-By-Year Total Return (%) as of 12/31 Each Year [INSERT BAR CHART] - -------- ------- ------- ------- ------- ------- ------- ------- ------ ------- 13.60 19.89 6.93 4.83 14.64 7.41 -12.82 29.22 18.72 9.46 - -------- ------- ------- ------- ------- ------- ------- ------- ------ ------- - -------- ------- ------- ------- ------- ------- ------- ------- ------ ------- 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 - -------- ------- ------- ------- ------- ------- ------- ------- ------ ------- Sales charges are not included in the returns shown above. If those charges were included, the returns shown would be lower. The year-to-date return as of June 30, 2006 is 5.42%. Highest return for a quarter during the period of the bar chart above: Q2 '03 15.73% Lowest return for a quarter during the period of the bar chart above: Q3 '02 -14.83% The following table shows, for the indicated periods ended December 31, 2005, the average annual total returns of the Class A and Class B shares of the Fund. Average Annual Total Returns (%) for periods ended December 31, 2005 1 Year 5 Years 10 Years Class A (before taxes) 3.43 8.25 10.03 (after taxes on distributions) (1) 2.64 7.38 8.04 (after taxes on distributions and sale of 3.25 6.73 7.62 shares) (1) Class B 3.55 8.21 9.90 S&P 500 (2) 4.91 0.54 9.07 S&P 500/Bara Value Index (3) 6.33 2.53 9.44 - ---------------------------- (1) After-tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation , may differ from those shown and are not relevant to investors who hold Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns for other share classes will vary. (2) The S&P 500 is a broad-based index intended to represent the U.S. equity market. Indices are unmanaged and individuals cannot invest directly in an index. Index performance information reflects no deduction for fees, expenses or taxes. (3) The S&P 500/Barra Value Index is constructed by ranking securities in the S&P 500 by price-to-book ratio and including those securities with the lowest price-to-book ratios that represent approximately half of the market capitalization of the S&P 500. Indices are unmanaged and individuals cannot invest directly in an index. Index performance reflects no deduction for fees, expenses or taxes. PROPOSAL 2 The following tables contain additional information with respect to the performance of the PIF Tax-Exempt Bond Fund and the WM Tax-Exempt Bond Fund. Both the PIF Tax-Exempt Bond Fund and the WM Tax-Exempt Bond Fund are proposed to be combined into the Tax-Exempt Bond Fund I, the Acquiring Fund in the Reorganization. Assuming the WM Fund Reorganization is consummated, the Acquiring Fund will report the historical performance information of WM Equity Income Fund as its own. PIF Tax-Exempt Bond Fund Class A and Class B shares began operations on June 30, 2005 when the Fund succeeded to the operations, and assumed the historical performance of the Class A and Class B shares of a predecessor fund. The bar chart below shows how the Fund's total return has varied year-by-year, while the table below shows performance of Class A and Class B shares over time (along with the returns of a broad-based market index and an index of funds with similar investment objectives for reference). This information may help provide an indication of the Fund's risks. Past performance does not indicate future results. Year-By-Year Total Return (%) as of 12/31 Each Year [INSERT BAR CHART] - ------- ------ ------ -------- ------- ------ -------- ------- --------- ------- 4.60 9.19 5.08 -3.17 7.96 5.68 9.20 4.51 3.56 2.64 - ------- ------ ------ -------- ------- ------ -------- ------- --------- ------- - ------- ------ ------ -------- ------- ------ -------- ------- --------- ------- 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 - ------- ------ ------ -------- ------- ------ -------- ------- --------- ------- The year-to-date return as of June 30, 2006 is 0.14% Highest return for a quarter during the period of the bar chart above: Q3 '02 5.21% Lowest return for a quarter during the period of the bar chart above: Q2 '04 -2.25% The bar chart above shows year-by-year total returns for the Class A shares. For periods prior to the first full calendar year of operations of the Fund's Class A shares, the annual returns are based on the performance of the Fund's Class A shares of the Fund's predecessor fund. The annual returns in the bar chart do not reflect sales charges; if sales charges were reflected, results would be lower. Each class of shares of the Fund invests in the same portfolio of securities, and the annual returns of each class will differ only to the extent the classes do not have the same expenses. The performance table below shows, for the indicated periods, the average annual total returns for the Class A and Class B shares. For periods prior to the date on which those classes succeeded to the operations of the Class A and Class B shares of the Fund's predecessor fund, the returns of the Class A and Class B shares of the Fund are based on the performance of the Class A and Class B shares of the predecessor fund. The predecessor fund's Class A shares commenced operations on March 20, 1986, and its Class B shares commenced operations on December 9, 1994. Average Annual Total Returns (%) for periods ended December 31, 2005 1 Year 5 Years 10 Years Class A (before taxes) -2.22 4.09 4.36 (after taxes on distributions) -2.45 3.96 4.27 (after taxes on distributions and sale 0.05 4.05 4.34 of shares) Class B -1.59 4.19 4.44 Lehman Brothers Municipal Bond Index 3.51 5.58 5.71 Morningstar Muni National Long Category Average 3.10 4.81 4.79 Index performance does not reflect deductions for fees, expenses or taxes. After-tax returns are shown for Class A shares only and would be different for Class B shares. They are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor's tax situation and may differ from those shown. WM Tax-Exempt Bond Fund The bar chart and tables below provide some indication of the risks of investing in the Fund by showing changes in performance from year to year. The Fund's past performance is not necessarily an indication of how the Fund will perform in the future. Year-By-Year Total Return (%) as of 12/31 Each Year [INSERT BAR CHART] - -------- ------ ------- --------- ------- ------ ------- ------- ------- ------- 2.52 8.59 5.08 -4.40 11.49 3.92 9.81 5.19 3.89 3.14 - -------- ------ ------- --------- ------- ------ ------- ------- ------- ------- - -------- ------ ------- --------- ------- ------ ------- ------- ------- ------- 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 - -------- ------ ------- --------- ------- ------ ------- ------- ------- ------- Sales charges are not included in the returns shown above. If those charges were included, the returns shown would be lower. The year-to-date return as of June 30, 2006 is 0.55%. Highest return for a quarter during the period of the bar chart above: Q3 '02 5.22% Lowest return for a quarter during the period of the bar chart above: Q2 '04 -2.58% The following table shows, for the indicated periods ended December 31, 2005, the annual total returns of the Class A and Class B shares of the Fund. Average Annual Total Returns (%) for periods ended December 31, 2005 (1) 1 Year 5 Years 10 Years Class A (before taxes) -1.50 4.19 4.35 (after taxes on distributions) (2) -1.81 3.98 4.25 (after taxes on distributions and sale of 0.81 4.17 4.36 shares) Class B -2.63 4.05 4.19 Lehman Brothers Municipal Bond Index (3) 3.53 5.58 5.71 - ------------------ (1) The Fund's performance in 2000 benefited from the agreement of WMA and its affiliates to limit the Fund's expenses. (2) After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns will depend on an investor's tax situation and may differ from those shown. After-tax returns are shown for only one share class offered by this prospectus. After tax returns for other share classes will vary. (3) The Lehman Brothers Municipal Bond Index is a total return performance benchmark for the long-term, investment grade, tax-exempt bond market. Indices are unmanaged and individuals cannot invest directly in an index. Index performance information reflects no deduction for fees, expenses or taxes. [FORM OF PROXY CARD] Principal Investors Fund, Inc. Des Moines, Iowa 50392-0200 The accompanying Proxy Statement outlines important issues affecting your [NAME OF FUND]. Help us save time and postage by voting on the Internet. The Internet voting site is generally available 24 hours a day and will ensure that your vote is confirmed and posted immediately. DO NOT MAIL THE PROXY CARD IF YOU ARE VOTING BY INTERNET. VOTING ON THE INTERNET o Read the Proxy Statement and have this card at hand. o Log onto https://vote.proxy-direct.com. o Enter your Control Number and follow the on-screen instructions. o Do not return this paper ballot. VOTE YOUR PROXY TODAY! SPECIAL MEETING OF SHAREHOLDERS DECEMBER 15, 2006 PRINCIPAL INVESTORS FUND, INC. [NAME OF FUND] THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS The undersigned shareholder appoints Jill R. Brown, Ernest H. Gillum and Michael J. Beer, and each of them separately, Proxies, with power of substitution, and authorizes them to represent and to vote as designated on this ballot, at the meeting of shareholders of the Fund to be held December 15, 2006 at _____ a.m., Central Daylight Time, and any adjournments thereof, all the shares of the Fund that the undersigned shareholder would be entitled to vote if personally present. Check the appropriate box on the ballot, date the ballot and sign exactly as your name appears. Your signature acknowledges receipt of the Notice of Special Meeting of Shareholders and the Proxy Statement, both dated October __, 2006. Shares will be voted as you instruct. If no direction is made, the proxy will be voted FOR the proposals listed. In their discretion, the Proxies will also be authorized to vote upon such other matters that may properly come before the meeting. Date________________, 2006 _____________________________________ Signature of Shareholder(s) (if held jointly) NOTE: PLEASE SIGN EXACTLY AS YOUR NAME APPEARS ON THIS BALLOT. PLEASE MARK, SIGN, DATE AND MAIL YOUR PROXY BALLOT IN THE ENCLOSED POSTAGE-PAID ENVELOPE. If shares are held jointly, either party may sign. If executed by a corporation, an authorized officer must sign. Executors, administrators and trustees should so indicate when signing. Please fill in boxes as shown using black or blue ink. PLEASE DO NOT USE FINE POINT PENS. The Board of Directors unanimously recommends that shareholders vote FOR all Proposals. Sign the proxy ballot and return it as soon as possible in the enclosed envelope. PROPOSALS For Against Abstain 1. Approval of a Plan of Reorganization [ ] [ ] [ ] providing for the reorganization of the Equity Income Fund into the Equity Income Fund I. (Only shareholders of the Equity Income Fund will vote on the Proposal) 2 Approval of a Plan of Reorganization [ ] [ ] [ ] providing for the reorganization of the Tax-Exempt Bond Fund into the Tax-Exempt Bond Fund I. (Only shareholders of the Tax-Exempt Bond Fund will vote on the Proposal) PART B INFORMATION REQUIRED IN A STATEMENT OF ADDITIONAL INFORMATION PRINCIPAL INVESTORS FUND, INC. 680 8th Street Des Moines, Iowa 50392-0200 STATEMENT OF ADDITIONAL INFORMATION Dated: October __, 2006 This Statement of Additional Information is available to the shareholders of the "Acquired Funds" listed below, in connection with the proposed reorganization of each Acquired Fund into the corresponding "Acquiring Fund" listed below, each of which is a separate series of Principal Investors Fund, Inc. ( the "Reorganizations"). Acquired Fund Acquiring Fund Equity Income Fund Equity Income Fund I Tax-Exempt Bond Fund Tax-Exempt Bond Fund I This Statement of Additional Information is not a prospectus and should be read in conjunction with the Proxy Statement/Prospectus dated October __, 2006, relating to the Special Meeting of Shareholders of the Acquired Funds to be held on December 15, 2006. The Proxy Statement/Prospectus, which describes the proposed Reorganizations, may be obtained without charge by writing to Principal Management Corporation, 680 8th Street, Des Moines, Iowa 50392-2080, or by calling toll free at 1-800-247-4123. This Statement of Additional Information incorporates by reference the following documents (or designated portions thereof) that have been filed with the Securities and Exchange Commission: (1) The Statement of Additional Information of Principal Investors Fund, Inc. ("PIF") dated October __, 2006, as filed on Form N-14 on September 20, 2006, except the pro forma financial statements and accompanying notes that are included in this Statement of Additional Infromation; (2) The financial statements of the Acquired Funds of PIF included in its Annual Report to Shareholders for the fiscal year ended October 31, 2005, which have been audited by Ernst & Young LLP, Independent Registered Public Accounting Firm, as filed on Form N-CSR on December 21, 2005; and (3) The unaudited financial statements of the Acquired Funds of PIF included in its Semi-Annual Report to Shareholders for the six-month period ended April 30, 2006, as filed on Form N-CSRS on June 28, 2006. The Annual and Semi-Annual Reports to Shareholders of PIF are available upon request and without charge by calling toll-free at 1-800-247-4123. Pro Forma Financial Statements Introductory Paragraph On September 11, 2006, the Board of Directors of Principal Investors Fund, Inc. approved two Plans of Reorganization whereby, subject to approval by the shareholders of each Acquired Fund, the Acquiring Fund will acquire all the assets of its corresponding Acquired Fund subject to the liabilities of such Acquired Fund, in exchange for a number of shares equal in value to the pro rata net assets of shares of the Acquired Fund (each, a "Reorganization"). The Acquired and Acquiring Funds in each Reorganization are: - --------------------------------- --------------------------------- Acquired Funds Acquiring Funds - --------------------------------- --------------------------------- - --------------------------------- --------------------------------- Equity Income Fund Equity Income Fund I - --------------------------------- --------------------------------- - --------------------------------- --------------------------------- Tax-Exempt Bond Fund Tax-Exempt Bond Fund I - --------------------------------- --------------------------------- Each Reorganization is contingent upon the Acquiring Fund first acquiring substantially all of the assets of a series of WM Trust I (each, a "WM Acquired Fund") as follows: --------------------------------- --------------------------------- WM Acquired Funds Acquiring Funds --------------------------------- --------------------------------- --------------------------------- --------------------------------- Equity Income Fund Equity Income Fund I --------------------------------- --------------------------------- --------------------------------- --------------------------------- Tax-Exempt Bond Fund Tax-Exempt Bond Fund I --------------------------------- --------------------------------- Shown below are unaudited pro forma financial statements for each of the combined Acquiring Funds, assuming the Reorganization had been consummated as of April 30, 2006. For each Reorganization, the first table presents pro forma Statements of Assets and Liabilities for the combined Acquiring Fund. The second table presents pro forma Statements of Operations for the combined Acquiring Fund. The third table presents a pro forma Schedule of Investments for the combined Acquiring Fund. The unaudited pro forma schedules of investments and statements of assets and liabilities reflect the financial position of the WM Acquired Funds, the Acquired Funds, and the Acquiring Funds at April 30, 2006. The unaudited pro forma statements of operations reflect the results of operations of the WM Acquired Funds, the Acquired Funds and the Acquiring Funds for the twelve months ended April 30, 2006. The pro forma combined financial statements are presented for the information of the reader and may not necessarily be representative of what the actual combined financial statements would have been had the Reorganizations occurred at April 30, 2006. Please see the accompanying notes for additional information about the pro forma financial statements. The pro forma schedules of investments and statements of assets and liabilities and operations should be read in conjunction with the historical financial statements of the Acquired Funds and the Acquiring Funds incorporated by reference in the Statement of Additional Information. Statements of Assets and Liabilities April 30, 2006 (unaudited) (in thousands) ----------------------------------------------------------------------------------------------- Combined WM Equity PIF Equity PIF Equity Pro Forma PIF Equity Income Fund Income Fund Income Fund I Adjustments Income Fund I ---------------------- -------------- -------------- ---------- ------------------- Investment in securities--at cost $ 3,082,440 $ 112,400 $ - $ - $ 3,194,840 ====================== ============== ============== ========== ================= Assets $ Investment in securities--at value $ 3,657,330 (a) $ 122,497 (a) $ - $ - 3,779,827(a) Cash 1 109 - - 110 Receivables: Capital Shares sold 17,577 37 - - 17,614 Dividends and interest 6,141 372 - - 6,513 Investment securities sold 52,082 1,388 - - 53,470 Other assets - 2 - - 2 Prepaid expenses 48 2 - - 50 ---------------------- -------------- -------------- ---------- ----------------- Total Assets 3,733,179 124,407 - - 3,857,586 Liabilities Accrued management and investment advisory fees 1,415 11 - - 1,426 Accrued distribution fees 647 6 - - 653 Accrued transfer and administrative fees 99 31 - - 130 Accrued other expenses 445 - - - 445 Payables: Capital Shares reacquired 2,469 64 - - 2,533 Indebtedness - 100 - - 100 Investment securities purchased 58,477 1,023 - - 59,500 Collateral obligation on securities loaned, at value 200,715 13,299 - - 214,014 ---------------------- -------------- -------------- ---------- ----------------- Total Liabilities 264,267 14,534 - - 278,801 ---------------------- -------------- -------------- ---------- ----------------- Net Assets Applicable to Outstanding Shares $ 3,468,912 $ 109,873 $ - $ - $ 3,578,785 ====================== ============== ============== ========== ================= Net Assets Consist of: Capital Shares and additional paid-in-capital $ 2,803,338 $ 111,579 $ - $ - $ 2,914,917 Accumulated undistributed (overdistributed) net investment income (operating loss) 3,276 236 - - 3,512 Accumulated undistributed (overdistributed) net realized gain (loss) 87,408 (12,047) - - 75,361 Net unrealized appreciation (depreciation) of investments 574,890 10,097 - - 584,987 Net unrealized appreciation (depreciation) on translation of assets and liabilities in foreign currencies - 8 - - 8 ---------------------- -------------- -------------- ---------- ----------------- Total Net Assets $ 3,468,912 $ 109,873 $ - $ - $ 3,578,785 ====================== ============== ============== ========== ================= Capital Stock (par value: $.01 a share): Shares authorized - 100,000 650,000 - 650,000 Net Asset Value Per Share: Class A: Net Assets $ 1,270,674 $ 96,515 $ - $ - $ 1,367,189(e) Shares issued and outstanding 59,158 7,788 - (3,295) (f) 63,651(e) Net asset value per share $ 21.48 $ 12.39 $ 21.48 Maximum offering price per share $ 22.73 (c) $ 13.15 (d) $ 22.73(c) ====================== ============== ============== ========== ================= Class B: Net Assets $ 293,220 $ 13,358 $ - $ - $ 306,578 Shares issued and outstanding 13,752 1,083 - (456) (f) 14,379 Net asset value per share (b) $ 21.32 $ 12.34 $ 21.32 ====================== ============== ============== ========== ================= $ Class C: Net Assets 203,788 N/A $ - $ - $ 203,788 Shares issued and outstanding 9,631 - - 9,631 Net asset value per share (b) $ 21.16 $ 21.16 ====================== ============== ============== ========== ================= Institutional (Class I): Net Assets $ 1,700,951 N/A $ - $ - $ 1,700,951 Shares issued and outstanding 79,175 - 79,175 Net asset value per share $ 21.48 $ 21.48 ====================== ============== ============== ========== ================= R-1: Net Assets $ 279 N/A $ - $ - 279(e) Shares issued and outstanding 13 - - 13(e) $ Net asset value per share 21.48 $ 21.48 ====================== ============== ============== ========== ================= R-2: Net Assets $ - N/A $ - $ - $ - Shares issued and outstanding - - - - Net asset value per share $ 21.48 $ 21.48 ====================== ============== ============== ========== ================= <FN> (a) Includes fair market value of securities loaned, see "Securities Lending" in Pro Forma Notes to Financial Statements. (b) Redemption price per share is equal to net asset value less any applicable contingent deferred sales charge. (c) Maximum offering price is equal to net asset value plus a front-end sales charge of 5.50% of the offering price. (d) Maximum offering price is equal to net asset value plus a front-end sales charge of 5.75% of the offering price. (e) Class A shares of WM Equity Income Fund will acquire the net assets of Class R-1 and Class R-2 shares prior to the Reorganization. (f) Reflects new shares issued, net of retired shares of PIF Equity Income Fund. </FN> Statements of Assets and Liabilities April 30, 2006 (unaudited) (in thousands) ----------------------------------------------------------------------------------- Combined WM Tax-Exempt PIF Tax-Exempt PIF Tax-Exempt Pro Forma PIF Tax-Exempt Bond Fund Bond Fund Bond Fund I Adjustments Bond Fund I ----------------- ----------------- ------------ ------------------------------ Investment in securities--at cost $ 186,281 $ 151,205 $ $ - $ 337,486 - ================= ================= ============ ======= ============== Assets Investment in securities--at value $ 197,097 $ 151,635 $ - $ - $ 348,732 Cash 945 810 - - 1,755 Receivables: Capital Shares sold 772 399 - - 1,171 Dividends and interest 3,144 2,189 - - 5,333 Expense reimbursement from Manager - 3 3 Investment securities sold - 6,703 - - 6,703 Other assets - 9 - - 9 Prepaid expenses 3 1 - - 4 ----------------- ----------------- ------------ ------- -------------- Total Assets 363,710 201,961 161,749 - - Liabilities Accrued management and investment advisory fees 82 13 - - 95 Accrued distribution fees 60 7 - - 67 Accrued transfer and administrative fees 6 13 - - 19 Accrued other expenses 50 - - - 50 Payables: Capital Shares reacquired 358 15 - - 373 Dividends payable 245 489 - - 734 Investment securities purchased 2,000 4,941 - - 6,941 Varation margin on futures contracts 21 - - - 21 ----------------- ----------------- ------------ ------- -------------- Total Liabilities 8,300 2,822 5,478 - - ----------------- ----------------- ------------ ------- -------------- Net Assets Applicable to Outstanding Shares $ 199,139 $ 156,271 $ - $ - $ 355,410 ================= ================= ============ ======= ============== Net Assets Consist of: Capital Shares and additional paid-in-capital $ 187,746 $ 154,765 $ - $ - $ 342,511 Accumulated undistributed (overdistributed) net investment income (operating loss) 217 514 - - 731 Accumulated undistributed (overdistributed) net realized gain (loss) 272 562 - - 834 Net unrealized appreciation (depreciation) of investments 10,904 430 - - 11,334 ----------------- ----------------- ------------ ------- -------------- Total Net Assets $ 199,139 $ 156,271 $ - $ - $ 355,410 ================= ================= ============ ======= ============== Capital Stock (par value: $.01 a share): Shares authorized - 100,000 300,000 - 300,000 Net Asset Value Per Share: Class A: Net Assets $ 169,423 $ 149,074 $ - $ - $ 318,497 Shares issued and outstanding 22,448 12,628 - 7,117 (d) 42,193 $ Net asset value per share 7.55 $ 11.81 $ 7.55 Maximum offering price per share $ 7.91 (a) $ 12.40 (c) $ 7.91 ================= ================= ============ ======= ============== Class B: Net Assets $ 26,964 $ 7,197 $ - $ - $ 34,161 Shares issued and outstanding 3,572 606 - 347 (d) 4,525 Net asset value per share (b) $ 7.55 $ 11.88 $ 7.55 ================= ================= ============ ======= ============== Class C: Net Assets $ 2,752 N/A $ - $ - $ 2,752 Shares issued and outstanding 365 - - 365 Net asset value per share (b) $ 7.55 $ 7.55 ================= ================= ============ ======= ============== <FN> (a) Maximum offering price is equal to net asset value plus a front-end sales charge of 4.50% of the offering price. (b) Redemption price per share is equal to net asset value less any applicable contingent deferred sales charge. (c) Maximum offering price is equal to net asset value plus a front-end sales charge of 4.75% of the offering price. (d) Reflects new shares issued, net of retired shares of PIF Tax-Exempt Bond Fund. </FN> STATEMENT OF OPERATIONS Twelve Months Ended April 30, 2006 (unaudited) (in thousands) - ------------------------------------------------------------------------------------------------------------------------------------ WM PIF PIF Pro Forma Combined PIF Equity Equity Equity Equity Income Income Income Income Fund Fund Fund I Adjustments Fund I - ------------ ------------------------------------------------------- ---------- ---------- -------- ------------ --------- Net Investment Income (Operating Loss) Income: $ $ $ $ Dividends 57,299 4,067 - $ - 61,366 Withholding tax on foreign dividends (299) (92) - - (391) Interest 11,377 292 - - 11,669 Securities Lending 997 - - - 997 ---------- ---------- -------- ------------ ---------- Total Income $ 69,374 4,267 - - 73,641 Expenses: Management and investment advisory fees 13,598 616 - (12) (b) 14,202 Custodian fees 70 - - (44) (c) 26 Directors' fees - - - 41 (c) 41 Legal and audit fees 75 - - (63) (c) 12 Registration and filing fees 185 - - (185) (c) - Printing and postage expense 786 - - (786) (c) - Distribution fees - Class A 2,278 226 - (3) (c) 2,501 Distribution fees - Class B 2,346 121 - 10 (c) 2,477 Distribution fees - Class C 1,317 - - - 1,317 Registration fees - Class A - 28 - - 28 Registration fees - Class B - 28 - - 28 Registration fees - Class C - - - 20 (c) 20 Shareholder meeting expense - Class A - 8 (a) - (8) (e) - Shareholder meeting expense - Class B - 2 (a) - (2) (e) - Shareholder reports - Class A - 6 - 54 (c) 60 Shareholder reports - Class B - 1 - 29 (c) 30 Shareholder reports - Class C - - - 10 (c) 10 Transfer and administrative fees - Class A 687 225 - (100) (c) 812 Transfer and administrative fees - Class B 442 62 - (10) (c) 494 Transfer and administrative fees - Class C 129 - - 4 (c) 133 Auditing and legal fees - 2 (a) - (2) (e) - Custodian fees - 4 (a) - (4) (e) - Registration fees - 4 (a) - (4) (e) - Shareholder meeting expense - 4 (a) - (4) (e) - Transfer and administrative fees - 42 (a) - (42) (e) - Other expenses 343 2 (342) (c) 3 ---------- ---------- -------- ------------ ---------- Total Gross Expenses 22,256 1,381 - (1,443) 22,194 Less Reimbursement from Manager - Class B - 3 (a) - 22 (d) 25 Less: Fees reduced by custodian credits 18 (18) - -------- ------------ ---------- ---------- ---------- Total Net Expenses 22,238 1,378 - (1,447) 22,169 ---------- ---------- -------- ------------ ---------- Net Investment Income (Operating Loss) 47,136 2,889 - 1,447 51,472 Net Realized and Unrealized Gain (Loss) on Investments and Foreign Currencies Net realized gain (loss) from: Investment transactions 152,138 8,625 - - 160,763 Foreign currency transactions - (1) - (1) Change in unrealized appreciation/depreciation of: Investments 252,862 4,791 - - 257,653 Translation of assets and liabilities in foreign currencies - 7 - 7 ---------- ---------- -------- ------------ ---------- Net Realized and Unrealized Gain (Loss) on Investments and Foreign Currencies 405,000 13,422 - - 418,422 ---------- ---------- -------- ------------ ---------- Net Increase (Decrease) in Net Assets Resulting from $ $ $ $ Operations 452,136 16,311 - $ 1,447 469,894 ========== ========== ======== ============ ========== <FN> (a) The amounts shown are those of Principal Equity Income Fund, Inc. (predecessor to PIF Equity Income Fund). (b) Management and investment advisory fees decreased to reflect annual percentage rate of Acquiring Fund. (c) To adjust expenses to reflect the Combined Fund's estimated fees and expenses, based on contractual rates or elimination of duplicate services. (d) The Manager has agreed to contractually reduce expenses in order to reduce total operating expenses of the Acquiring Fund. (e) Elimination of expense of Principal Equity Income Fund, Inc. (predecessor to PIF Equity Income Fund). </FN> STATEMENT OF OPERATIONS Twelve Months Ended April 30, 2006 (unaudited) (in thousands) - ------------------------------------------------------------------------------------------------------------------------------------ WM PIF PIF Pro Forma Combined PIF Tax-Exempt Tax-Exempt Tax-Exempt Tax-Exempt Bond Fund Bond Fund Bond Fund I Adjustments Bond Fund I - ----- -------------------------------------------------------------------------------- ------ ---------------- --------- Net Investment Income (Operating Loss) Income: $ $ $ $ Interest 10,732 7,660 - - $ 18,392 ------------- --------- ----------- ------------ ---------- Total Income 10,732 7,660 - - 18,392 Expenses: Management and investment advisory fees 1,044 817 - - 1,861 Custodian fees 11 - - (7) (b) 4 Directors' fees - - - 4 (b) 4 Legal and audit fees 33 - - (21) (b) 12 Registration and filing fees 40 - - (40) (b) - Printing and postage expense 22 - - (22) (b) - Distribution Fees - Class A 441 363 - 30 (b) 834 Distribution Fees - Class B 302 35 - 43 (b) 380 Distribution Fees - Class C 25 - - - 25 Registration Fees - Class A - 30 - - 30 Registration Fees - Class B - 28 - - 28 Registration Fees - Class C - - - 20 (b) 20 Shareholder Reports - Class A - 1 - 6 (b) 7 Shareholder Reports - Class B - - - 1 (b) 1 Transfer and administrative fees - Class A 73 68 - (8) (b) 133 Transfer and administrative fees - Class B 15 16 - (12) (b) 19 Transfer and administrative fees - Class C 1 - - 1 (b) 2 Auditing and legal fees - 1 (a) - (1) (c) - Custodian fees - 1 (a) - (1) (c) - Directors' expenses - 1 (a) - (1) (c) - Registration fees - 5 (a) - (5) (c) - Shareholder meeting expense - 1 (a) - (1) (c) - Transfer and administrative fees - 7 (a) - (7) (c) - Other expenses 29 2 - (26) (b) 5 ------------- --------- ----------- ------------ ---------- Total Gross Expenses 2,036 1,376 - (47) 3,365 Less Reimbursement from Manager - Class A - 57 - 109 (d) 166 Less Reimbursement from Manager - Class B - 33 - 156 (d) 189 Less Reimbursement from Manager - Class C - - - 27 (d) 27 Less: Fees reduced by custodian credits 6 - - (6) (b) - ------------- --------- ----------- ---------- ------------ Total Net Expenses 2,030 1,286 - (333) 2,983 ------------- --------- ----------- ------------ ---------- Net Investment Income (Operating Loss) 8,702 6,374 - 333 15,409 Net Realized and Unrealized Gain (Loss) on Investments and Foreign Currencies Net realized gain (loss) from: Investment transactions 2,154 611 - - 2,765 Futures contracts 273 - - - 273 Change in unrealized appreciation/depreciation of: Investments (6,034) (4,037) - - (10,071) Futures contracts 229 - - - 229 ------------- --------- ----------- ------------ ---------- Net Realized and Unrealized Gain (Loss) on Investments and Foreign Currencies (3,378) (3,426) - - (6,804) ------------- --------- ----------- ------------ ---------- Net Increase (Decrease) in Net Assets Resulting from $ Operations 5,324 $ 2,948 $ - $ 333 $ 8,605 ============= ========= =========== ============ ========== <FN> (a) Amounts shown are those of Principal Tax-Exempt Bond Fund, Inc. (predecessor to PIF Tax-Exempt Bond Fund). (b) To adjust expenses to reflect the Combined Fund's estimated fees and expenses, based on contractual rates or elimination of duplicate services. (c) Elimination of expense of Principal Tax-Exempt Bond Fund, Inc. (predecessor to PIF Tax-Exempt Bond Fund). (d) The Manager has agreed to contractually reduce expenses in order to reduce total operating expenses of the Acquiring Fund. </FN> Schedule of Investments April 30, 2006 (unaudited) WM Equity PIF Equity PIF Equity WM Equity PIF Equity PIF Equity Income Income Income Income Income Income Fund Fund Fund I Combined Fund Fund Fund I Combined Shares Shares Shares Shares Value Value Value Value Held Held Held Held (000s) (000s) (000s) (000s) 94.90% COMMON STOCKS 1.47% Advertising Services 266,000 - - 266,000 Boeing Co 22,198 - - 22,198 121,200 - - 121,200 General Dynamics Corp 7,953 - - 7,953 329,500 - - 329,500 Northrop Grumman Corp (a) 22,043 - - 22,043 - 2,898 - 2,898 PagesJaunes Groupe SA - 84 - 84 52,194 84 - 52,278 0.02% Aerospace & Defense Equipment - 8,300 - 8,300 United Technologies Corp - 521 - 521 0.02% Appliances - 5,500 - 5,500 Whirlpool Corp - 494 - 494 0.68% Applications Software 989,300 18,000 - 1,007,300 Microsoft Corp 23,891 435 - 24,326 0.65% Athletic Footwear 283,000 - - 283,000 Nike Inc Class B 23,161 - - 23,161 0.01% Auto - Car & Light Trucks - 5,038 - 5,038 DaimlerChrysler AG - 277 - 277 0.68% Auto - Medium & Heavy Duty Trucks 340,000 - - 340,000 Paccar Inc (a) 24,456 - - 24,456 0.92% Auto/Truck Parts & Equipment - Original - 22,627 - 22,627 GKN PLC - 129 - 129 401,500 - - 401,500 Johnson Controls Inc 32,742 - - 32,742 32,742 129 - 32,871 0.18% Beverages - Non-alcoholic - 12,000 - 12,000 Coca-Cola Co/The - 503 - 503 290,300 - - 290,300 Coca-Cola Enterprises Inc 5,670 - - 5,670 - 4,100 - 4,100 PepsiCo Inc - 238 - 238 5,670 741 - 6,411 0.74% Beverages - Wine & Spirits - 14,108 - 14,108 Diageo PLC - 232 - 232 396,300 - - 396,300 Diageo PLC ADR (a) 26,255 - - 26,255 26,255 232 - 26,487 1.13% Brewery 906,600 - - 906,600 Anheuser-Busch Cos Inc 40,416 - - 40,416 0.01% Building - Heavy Construction - 8,103 - 8,103 NCC AB - 203 - 203 - 3,559 - 3,559 Severfield-Rowen PLC - 81 - 81 - 284 - 284 0.00% Building - Residential & Commercial - 960 - 960 Hyundai Development Co - 56 - 56 0.00% Building & Construction Products - Miscellaneous - 15,662 - 15,662 CSR Ltd - 48 - 48 - 8,917 - 8,917 Fletcher Building Ltd - 51 - 51 - 99 - 99 1.04% Building Products 550,000 - - 550,000 Cemex SA de CV ADR 37,136 - 37,136 0.93% Cellular Telecommunications - 51,544 - 51,544 Vodafone Group PLC - 121 - 121 1,404,200 - - 1,404,200 Vodafone Group PLC ADR 33,279 - - 33,279 33,279 121 - 33,400 0.80% Chemicals - Diversified - 25,400 - 25,400 Lyondell Chemical Co (a) - 612 - 612 418,300 - - 418,300 PPG Industries Inc 28,076 - - 28,076 28,076 612 - 28,688 0.01% Circuit Boards - 84,500 - 84,500 Elec & Eltek International Co Ltd - 207 - 207 0.76% Coal - 2,400 - 2,400 Fording Canadian Coal Trust - 88 - 88 427,200 - - 427,200 Peabody Energy Corp 27,281 - - 27,281 27,281 88 - 27,369 0.02% Coatings & Paint - 21,500 - 21,500 Valspar Corp - 608 - 608 0.87% Commercial Banks - 5,389 - 5,389 ABN AMRO Holding NV - 161 - 161 - 1,842 - 1,842 Alpha Bank AE - 70 - 70 - 26,700 - 26,700 AmSouth Bancorp - 773 - 773 - 7,994 - 7,994 Australia & New Zealand Banking Group Ltd - 170 - 170 - 21,893 - 21,893 Banco Santander Central Hispano SA - 339 - 339 - 23,200 - 23,200 Bank of East Asia Ltd - 97 - 97 - 6,000 - 6,000 Bank of Hawaii Corp (a) - 326 - 326 - 31,104 - 31,104 Barclays PLC - 388 - 388 - 3,730 - 3,730 BNP Paribas - 352 - 352 - 20,300 - 20,300 Colonial BancGroup Inc/The - 526 - 526 - 9,639 - 9,639 Commonwealth Bank of Australia - 344 - 344 - 3,148 - 3,148 Credit Agricole SA - 127 - 127 - 2,620 - 2,620 Daegu Bank - 49 - 49 - 5,320 - 5,320 Danske Bank A/S - 211 - 211 - 643 - 643 Deutsche Bank AG - 79 - 79 - 14,200 - 14,200 DNB NOR ASA - 197 - 197 - 5,465 - 5,465 Fortis - 205 - 205 - 4,807 - 4,807 HBOS PLC - 84 - 84 - 23,499 - 23,499 HSBC Holdings PLC - 405 - 405 - 91 - 91 Liechtenstein Landesbank - 73 - 73 - 5,201 - 5,201 Lloyds TSB Group PLC - 50 - 50 821,700 - - 821,700 North Fork Bancorporation Inc 24,758 - - 24,758 - 3,100 - 3,100 Royal Bank of Canada - 132 - 132 - 8,901 - 8,901 Sanpaolo IMI SpA - 167 - 167 - 1,240 - 1,240 Societe Generale - 189 - 189 - 2,300 - 2,300 Torinto Dominion Bank (b) - 127 - 127 - 8,700 - 8,700 UnionBanCal Corp - 609 - 609 24,758 6,250 - 31,008 0.01% Computer Services - 42,800 - 42,800 HIQ International AB - 258 - 258 2.29% Computers 805,000 29,500 - 834,500 Hewlett-Packard Co 26,138 958 - 27,096 666,900 - - 666,900 International Business Machines Corp 54,913 - - 54,913 81,051 958 - 82,009 0.00% Computers - Peripheral Equipment - 113,000 - 113,000 GES International Ltd - 71 - 71 0.46% Consumer Products - Miscellaneous 257,700 - - 257,700 Clorox Co 16,539 - - 16,539 2.01% Cosmetics & Toiletries 653,800 - - 653,800 Colgate-Palmolive Co 38,653 - - 38,653 573,500 - - 573,500 Procter & Gamble Co 33,383 - - 33,383 72,036 - - 72,036 0.00% Containers - Paper & Plastic - 6,800 - 6,800 British Polythene Industries - 78 - 78 1.40% Data Processing & Management 812,600 8,300 - 820,900 Automatic Data Processing Inc 35,819 366 - 36,185 295,400 - - 295,400 First Data Corp 14,088 - - 14,088 49,907 366 - 50,273 0.02% Distribution & Wholesale - 15,833 - 15,833 Alesco Corp Ltd - 120 - 120 - 10,600 - 10,600 Genuine Parts Co - 462 - 462 - 582 - 582 0.01% Diversified Financial Services - 80,000 - 80,000 Acta Holding ASA - 360 - 360 - 13,000 - 13,000 Guoco Group Ltd - 162 - 162 - 522 - 522 5.40% Diversified Manufacturing Operations 674,000 - - 674,000 3M Co 57,580 - - 57,580 776,300 - - 776,300 Dover Corp 38,621 - - 38,621 - 7,220 - 7,220 Eaton Corp - 553 - 553 966,200 22,100 - 988,300 General Electric Co 33,421 764 - 34,185 499,200 14,400 - 513,600 Honeywell International Inc 21,216 612 - 21,828 716,700 - - 716,700 ITT Industries Inc 40,300 - - 40,300 - 56,247 - 56,247 Senior PLC - 70 - 70 191,138 1,999 - 193,137 0.72% Diversified Minerals - 5,897 - 5,897 Anglo American PLC - 250 - 250 1,179,000 - - 1,179,000 Anglo American PLC ADR 25,408 - - 25,408 - 2,370 - 2,370 BHP Billiton Ltd - 53 - 53 - 33,061 - 33,061 Independence Group NL - 75 - 75 25,408 378 - 25,786 1.04% Electric - Integrated - 1,999 - 1,999 E.ON AG - 245 - 245 - 12,100 - 12,100 Edison International - 489 - 489 - 6,351 - 6,351 Endesa SA - 211 - 211 - 15,100 - 15,100 FirstEnergy Corp - 766 - 766 637,900 18,600 - 656,500 FPL Group Inc (a) 25,261 737 - 25,998 - 6,855 - 6,855 International Power PLC - 37 - 37 - 17,600 - 17,600 PPL Corp - 511 - 511 - 5,509 - 5,509 Scottish & Southern Energy PLC - 112 - 112 - 14,800 - 14,800 TXU Corp - 734 - 734 422,800 - - 422,800 Xcel Energy Inc (a) 7,965 - 7,965 33,226 3,842 - 37,068 0.66% Electric Products - Miscellaneous 270,500 6,100 - 276,600 Emerson Electric Co 22,979 518 - 23,497 0.00% Electric-Transmission - 30,470 - 30,470 Terna SpA - 84 - 84 1.67% Electronic Components - Semiconductors 765,000 - - 765,000 Microchip Technology Inc (a) 28,504 - - 28,504 40,800 - - 40,800 Samsung Electronics Co Ltd GDR (c) 13,929 - - 13,929 499,800 - - 499,800 Texas Instruments Inc 17,348 - - 17,348 59,781 - - 59,781 0.00% Engineering - Research & Development Services - 5,304 - 5,304 ABB Ltd (b) - 75 - 75 0.99% Fiduciary Banks 545,400 - - 545,400 Bank of New York Co Inc 19,171 - - 19,171 410,700 - - 410,700 Mellon Financial Corp 15,455 - - 15,455 - 14,700 - 14,700 Wilmington Trust Corp - 651 - 651 34,626 651 - 35,277 0.01% Finance - Commercial - 9,000 - 9,000 CIT Group Inc - 486 - 486 0.43% Finance - Credit Card 178,600 - - 178,600 Capital One Financial Corp (a) 15,474 - - 15,474 5.12% Finance - Investment Banker & Broker 1,035,333 30,686 - 1,066,019 Citigroup Inc 51,715 1,533 - 53,248 - 5,467 - 5,467 Credit Suisse Group - 342 - 342 - 12,100 - 12,100 D Carnegie AB - 268 - 268 270,600 4,600 - 275,200 Goldman Sachs Group Inc (a) 43,375 737 - 44,112 1,054,700 36,060 - 1,090,760 JPMorgan Chase & Co 47,862 1,636 - 49,498 - 15,100 - 15,100 Merrill Lynch & Co Inc (a) - 1,152 - 1,152 535,900 - - 535,900 Morgan Stanley 34,458 - - 34,458 - 727 - 727 UBS AG - 86 - 86 177,410 5,754 - 183,164 1.19% Finance - Mortgage Loan/Banker - 15,100 - 15,100 CharterMac (a) - 291 - 291 571,300 - - 571,300 Countrywide Financial Corp 23,229 - - 23,229 310,000 - - 310,000 Freddie Mac 18,929 - - 18,929 - 2,511 - 2,511 Paragon Group of Cos PLC - 33 - 33 42,158 324 - 42,482 0.00% Financial Guarantee Insurance - 412 - 412 Euler Hermes SA - 51 - 51 0.99% Food - Confectionery 661,700 - - 661,700 Hershey Co 35,295 - - 35,295 0.21% Food - Miscellaneous/Diversified 169,500 - - 169,500 Cadbury Schweppes PLC ADR (a) 6,773 - - 6,773 - 8,500 - 8,500 General Mills Inc - 419 - 419 - 5,500 - 5,500 Kellogg Co - 255 - 255 6,773 674 - 7,447 0.82% Food - Wholesale & Distribution 981,700 - - 981,700 Sysco Corp (a) 29,343 - - 29,343 0.61% Forestry 285,000 - - 285,000 Plum Creek Timber Co Inc 10,346 - - 10,346 164,200 - - 164,200 Weyerhaeuser Co 11,571 - - 11,571 21,917 - - 21,917 0.01% Gambling (Non-Hotel) - 9,248 - 9,248 OPAP SA - 341 - 341 0.02% Home Decoration Products - 26,300 - 26,300 Newell Rubbermaid Inc - 721 - 721 0.52% Hotels & Motels 689,000 - - 689,000 Hilton Hotels Corp 18,561 - - 18,561 0.00% Human Resources - 480 - 480 USG People NV - 41 - 41 0.37% Industrial Automation & Robots 185,000 - - 185,000 Rockwell Automation Inc 13,405 - - 13,405 0.60% Insurance Brokers - 13,200 - 13,200 AON Corp - 553 - 553 676,300 - - 676,300 Marsh & McLennan Cos Inc (a) 20,742 - - 20,742 20,742 553 - 21,295 0.56% Investment Companies 629,200 - - 629,200 Allied Capital Corp (a) 19,543 - - 19,543 - 15,300 - 15,300 American Capital Strategies Ltd (a) - 533 - 533 19,543 533 - 20,076 1.67% Investment Management & Advisory Services - 21,370 - 21,370 Aberdeen Asset Management PLC - 77 - 77 180,000 - - 180,000 Ameriprise Financial Inc 8,827 - - 8,827 262,500 - - 262,500 Franklin Resources Inc 24,444 - - 24,444 - 11,428 - 11,428 Record Investments Ltd - 91 - 91 311,300 - - 311,300 T. Rowe Price Group Inc 26,208 - - 26,208 59,479 168 - 59,647 1.67% Life & Health Insurance 793,000 - - 793,000 AFLAC Inc 37,699 - - 37,699 - 15,326 - 15,326 AMP Ltd - 105 - 105 240,200 - - 240,200 Lincoln National Corp 13,951 - - 13,951 - 7,100 - 7,100 Protective Life Corp - 358 - 358 96,400 - - 96,400 Prudential Financial Inc 7,532 - - 7,532 59,182 463 - 59,645 0.00% Lottery Services - 1,853 - 1,853 Intralot SA-Integrated Lottery Systems - 60 - 60 1.05% Machinery - Construction & Mining 490,600 - - 490,600 Caterpillar Inc 37,158 - - 37,158 - 10,400 - 10,400 Wajax Income Fund - 358 - 358 37,158 358 - 37,516 0.00% Machinery - General Industry - 1,899 - 1,899 MAN AG - 144 - 144 5.54% Medical - Drugs 410,900 10,200 - 421,100 Abbott Laboratories 17,562 436 - 17,998 - 1,215 - 1,215 AstraZeneca PLC - 67 - 67 324,500 - - 324,500 AstraZeneca PLC ADR 17,890 - - 17,890 675,100 - - 675,100 Bristol-Myers Squibb Co 17,134 - - 17,134 285,300 - - 285,300 Eli Lilly & Co 15,098 - - 15,098 - 3,107 - 3,107 GlaxoSmithKline PLC - 88 - 88 375,600 - - 375,600 GlaxoSmithKline PLC ADR 21,364 - - 21,364 - 11,200 - 11,200 Merck & Co Inc - 386 - 386 1,615,900 31,000 - 1,646,900 Pfizer Inc 40,931 785 - 41,716 253,300 - - 253,300 Roche Holding AG ADR 19,419 - - 19,419 - 863 - 863 Sanofi-Aventis - 81 - 81 896,700 - - 896,700 Schering-Plough Corp 17,324 - - 17,324 597,900 14,500 - 612,400 Wyeth 29,100 705 - 29,805 195,822 2,548 - 198,370 1.37% Medical - HMO 982,500 - - 982,500 UnitedHealth Group Inc 48,869 - - 48,869 0.00% Medical - Hospitals - 88,800 - 88,800 Parkway Holdings Ltd - 147 - 147 0.55% Medical - Wholesale Drug Distribution 292,400 - - 292,400 Cardinal Health Inc 19,693 - - 19,693 2.02% Medical Products 375,000 5,000 - 380,000 Becton Dickinson & Co 23,640 315 - 23,955 818,300 6,900 - 825,200 Johnson & Johnson 47,961 405 - 48,366 71,601 720 - 72,321 0.41% Metal - Aluminum 282,600 - - 282,600 Alcan Inc (a) (f) 14,769 - - 14,769 - 2,656 - 2,656 Aluminum of Greece S.A.I.C. - 62 - 62 14,769 62 - 14,831 0.01% Metal - Diversified - 2,255 - 2,255 Boliden AB (b) - 46 - 46 - 7,200 - 7,200 Freeport-McMoRan Copper & Gold Inc - 465 - 465 - 511 - 511 0.00% Metal Processors & Fabrication - 4,709 - 4,709 Martinrea International Inc (b) - 36 - 36 0.00% Miscellaneous Manufacturers - 18,060 - 18,060 Fenner Plc - 69 - 69 0.01% Mortgage Banks - 25,225 - 25,225 Bradford & Bingley PLC - 222 - 222 7.03% Multi-line Insurance 986,000 - - 986,000 ACE Ltd (a) 54,762 - - 54,762 505,900 - - 505,900 Allstate Corp 28,578 - - 28,578 816,100 - - 816,100 American International Group Inc 53,251 - - 53,251 - 3,008 - 3,008 Assicurazioni Generali SpA - 113 - 113 - 1,569 - 1,569 Assurances Generales de France - 198 - 198 - 13,834 - 13,834 Aviva PLC - 202 - 202 - 6,046 - 6,046 AXA SA - 222 - 222 341,400 9,600 - 351,000 Hartford Financial Services Group Inc 31,385 883 - 32,268 444,100 - - 444,100 HCC Insurance Holdings Inc (a) 14,873 - - 14,873 - 279 - 279 Helvetia Patria Holding - 75 - 75 - 6,684 - 6,684 ING Groep NV - 271 - 271 550,500 - - 550,500 ING Groep NV ADR 22,339 - - 22,339 168,900 - - 168,900 Loews Corp 17,929 - - 17,929 500,700 8,800 - 509,500 Metlife, Inc 26,087 457 - 26,544 249,204 2,421 - 251,625 0.01% Multimedia - 7,000 - 7,000 McGraw-Hill Cos Inc/The - 390 - 390 0.00% Music 4,500 - - 4,500 V2 Music Holdings PLC - Warrant(b)(c) - - - - 0.58% Non-hazardous Waste Disposal 555,000 - - 555,000 Waste Management Inc 20,790 - - 20,790 2.41% Oil - Field Services - 3,000 - 3,000 Acergy SA (b) - 49 - 49 706,300 - - 706,300 Baker Hughes Inc (a) 57,090 - - 57,090 - 6,862 - 6,862 Peak Energy Services Trust - 78 - 78 415,600 - - 415,600 Schlumberger Ltd 28,735 - - 28,735 - 12,838 - 12,838 Trinidad Energy Services Income Trust - 210 - 210 85,825 337 - 86,162 1.21% Oil & Gas Drilling - 5,700 - 5,700 Diamond Offshore Drilling Inc - 517 - 517 695,000 - - 695,000 GlobalSantaFe Corp (a) 42,541 - - 42,541 - 7,800 - 7,800 Rowan Cos Inc (a) - 346 - 346 42,541 863 - 43,404 0.01% Oil Company - Exploration & Production - 10,100 - 10,100 NAL Oil & Gas Trust - 172 - 172 - 378 - 378 Total Gabon - 348 - 348 - 520 - 520 4.15% Oil Company - Integrated - 6,703 - 6,703 BP PLC - 82 - 82 240,500 - - 240,500 BP PLC ADR 17,730 - - 17,730 330,000 - - 330,000 Chevron Corp 20,137 - - 20,137 611,800 14,500 - 626,300 ConocoPhillips Co. 40,929 970 - 41,899 - 4,635 - 4,635 ENI SpA - 141 - 141 - 39,540 - 39,540 Exxon Mobil Corp - 2,494 - 2,494 812,300 6,900 - 819,200 Marathon Oil Corp 64,464 548 - 65,012 - 10,400 - 10,400 Occidental Petroleum Corp (a) - 1,068 - 1,068 - 116,000 - 116,000 PetroChina Co Ltd - 129 - 129 143,260 5,432 - 148,692 0.84% Oil Refining & Marketing 465,768 - - 465,768 Valero Energy Corp 30,154 - - 30,154 0.10% Paper & Related Products 80,800 - - 80,800 Tempe-Inland Inc 3,752 - - 3,752 0.50% Pharmacy Services 387,000 3,000 - 390,000 Caremark Rx Inc (b) 17,628 137 - 17,765 0.79% Pipelines 149,400 - - 149,400 Enterprise Products Partners LP (a) 3,696 - - 3,696 93,800 - - 93,800 Kinder Morgan Energy Partners LP (a) 4,355 - - 4,355 224,600 - - 224,600 Kinder Morgan Inc 19,769 - - 19,769 - 6,500 - 6,500 Questar Corp - 520 - 520 27,820 520 - 28,340 0.00% Power Converter & Supply Equipment - 999 - 999 Schneider Electric SA - 113 - 113 0.01% Printing - Commercial - 11,300 - 11,300 RR Donnelley & Sons Co - 381 - 381 1.31% Property & Casualty Insurance - 4,625 - 4,625 Admiral Group Plc - 56 - 56 - 61,008 - 61,008 Brit Insurance Holdings Plc - 107 - 107 - 142,898 - 142,898 Chaucer Holdings PLC - 182 - 182 276,800 7,452 - 284,252 Chubb Corp 14,266 384 - 14,650 - 2,040 - 2,040 Dongbu Insurance Co Ltd - 51 - 51 750,000 - - 750,000 Fidelity National Financial Inc 31,485 - - 31,485 - 146,562 - 146,562 Highway Insurance Holdings PLC - 236 - 236 - 5,113 - 5,113 QBE Insurance Group Ltd - 87 - 87 - 20,984 - 20,984 Royal & Sun Alliance Insurance Group - 53 - 53 45,751 1,156 - 46,907 0.01% Property Trust - 37,886 - 37,886 Babcock & Brown Japan Property Trust - 51 - 51 - 21,868 - 21,868 Centro Properties Group - 108 - 108 - 27,881 - 27,881 Macquarie Leisure Trust Group - 61 - 61 - 10,668 - 10,668 Stockland - 55 - 55 - 275 - 275 0.00% Publishing - Periodicals - 1,344 - 1,344 Wolters Kluwer NV - 35 - 35 0.01% Quarrying - 4,800 - 4,800 Vulcan Materials Co - 408 - 408 0.00% Real Estate Magagement & Services - 504 - 504 Nexity (b) - 35 - 35 0.01% Real Estate Operator & Developer - 35,106 - 35,106 FKP Property Group - 141 - 141 - 29,000 - 29,000 New World Development Ltd - 52 - 52 - 193 - 193 4.33% Regional Banks 901,096 16,800 - 917,896 Bank of America Corp 44,983 839 - 45,822 344,300 8,400 - 352,700 PNC Financial Services Group Inc 24,607 600 - 25,207 176,500 - - 176,500 SunTrust Banks Inc 13,649 - - 13,649 560,000 29,600 - 589,600 U.S. Bancorp 17,606 931 - 18,537 744,000 9,900 - 753,900 Wells Fargo & Co 51,105 680 - 51,785 151,950 3,050 - 155,000 0.95% REITS - Apartments 238,500 20,000 - 258,500 Archstone-Smith Trust 11,658 978 - 12,636 - 8,400 - 8,400 AvalonBay Communities Inc - 905 - 905 398,000 30,000 - 428,000 Equity Residential (a) 17,858 1,346 - 19,204 - 11,200 - 11,200 Mid-America Apartment Communities Inc - 594 - 594 - 29,300 - 29,300 United Dominion Realty Trust Inc (a) - 796 - 796 29,516 4,619 - 34,135 0.44% REITS - Diversified 131,000 - - 131,000 Duke Realty Corp (a) 4,637 - - 4,637 - 12,800 - 12,800 Summit Real Estate Investment Trust - 286 - 286 - 3,191 - 3,191 Vastned Offices/Industrial - 113 - 113 102,000 9,500 - 111,500 Vornado Realty Trust (a) 9,755 908 - 10,663 14,392 1,307 - 15,699 0.23% REITS - Healthcare 275,400 - - 275,400 Health Care Property Investors Inc(a) 7,551 - - 7,551 - 21,400 - 21,400 Ventas Inc (a) - 699 - 699 7,551 699 - 8,250 0.59% REITS - Hotels - 25,500 - 25,500 Equity Inns Inc - 413 - 413 918,700 36,100 - 954,800 Host Hotels & Resorts Inc (a) 19,311 759 - 20,070 - 21,600 - 21,600 Sunstone Hotel Investors Inc - 621 - 621 19,311 1,793 - 21,104 0.06% REITS - Mortgage - 23,800 - 23,800 Arbor Realty Trust Inc - 616 - 616 - 20,000 - 20,000 CapitalSource Inc (a) - 470 - 470 - 41,500 - 41,500 Gramercy Capital Corp/New York - 1,031 - 1,031 - 2,117 - 2,117 0.10% REITS - Office Property - 24,822 - 24,822 BioMed Realty Trust Inc - 687 - 687 - 12,200 - 12,200 Boston Properties Inc (a) - 1,077 - 1,077 - 18,000 - 18,000 Equity Office Properties Trust - 581 - 581 - 13,000 - 13,000 Kilroy Realty Corp (a) - 927 - 927 - 4,400 - 4,400 SL Green Realty Corp - 436 - 436 - 3,708 - 3,708 0.70% REITS - Regional Malls - 16,500 - 16,500 CBL & Associates Properties Inc - 660 - 660 119,600 - - 119,600 General Growth Properties Inc 5,615 - - 5,615 81,000 6,000 - 87,000 Macerich Co 5,931 439 - 6,370 127,100 24,200 - 151,300 Simon Property Group Inc (a) 10,407 1,982 - 12,389 21,953 3,081 - 25,034 0.45% REITS - Shopping Centers 123,400 17,200 - 140,600 Developers Diversified Realty Corp 6,565 915 - 7,480 177,100 26,100 - 203,200 Kimco Realty Corp (a) 6,576 969 - 7,545 - 12,000 - 12,000 Tanger Factory Outlet Centers Inc - 393 - 393 - 13,500 - 13,500 Weingarten Realty Investors - 533 - 533 13,141 2,810 - 15,951 0.27% REITS - Storage 124,100 - - 124,100 Public Storage Inc (a) 9,541 - - 9,541 0.91% REITS - Warehouse & Industrial 208,100 13,000 - 221,100 AMB Property Corp 10,403 650 - 11,053 - 8,700 - 8,700 EastGroup Properties Inc - 388 - 388 421,300 - - 421,300 ProLogis 21,158 - - 21,158 31,561 1,038 - 32,599 0.00% Rental - Auto & Equipment - 13,084 - 13,084 Ashtead Group PLC - 56 - 56 0.98% Retail - Apparel & Shoe 1,351,600 - - 1,351,600 Gap Inc 24,450 - - 24,450 - 53,622 - 53,622 Just Group Ltd - 128 - 128 276,300 - - 276,300 Nordstrom Inc (a) 10,591 - - 10,591 - 1,973 - 1,973 Reitman's Canada Ltd - 40 - 40 35,041 168 - 35,209 0.01% Retail - Building Products - 5,100 - 5,100 Home Depot Inc - 204 - 204 0.00% Retail - Catalog Shopping - 8,475 - 8,475 N Brown Group PLC - 34 - 34 0.44% Retail - Drug Store 532,200 - - 532,200 CVS Corp 15,817 - - 15,817 0.33% Retail - Jewelry 336,100 - - 336,100 Tiffany & Co 11,727 - - 11,727 0.02% Retail - Major Department Store - 9,900 - 9,900 JC Penney Co Inc - 648 - 648 0.95% Retail - Restaurants 961,200 24,445 - 985,645 McDonald's Corp 33,229 845 - 34,074 0.40% Semiconductor Component - Integrated Circuits - 2,339 - 2,339 CSR PLC (b) - 52 - 52 398,200 - - 398,200 Linear Technology Corp (a) 14,136 - - 14,136 14,136 52 - 14,188 0.94% Semiconductor Equipment 1,873,200 - - 1,873,200 Applied Materials Inc 33,624 - - 33,624 - 30,500 - 30,500 ASM Pacific Technology - 178 - 178 33,624 178 - 33,802 0.00% Shipbuilding - 1,882 - 1,882 Aker Yards AS - 150 - 150 0.02% Steel - Producers - 148,000 - 148,000 Angang New Steel Co Ltd - 129 - 129 - 420 - 420 Boehler-Uddeholm AG - 95 - 95 - 8,600 - 8,600 Rautaruukki OYJ - 301 - 301 - 11,300 - 11,300 Russel Metals - 252 - 252 - 2,576 - 2,576 Tubos Reunidos SA - 43 - 43 - 820 - 820 0.76% Telecommunication Equipment 587,000 - - 587,000 Harris Corp (a) 27,337 - - 27,337 5.36% Telephone - Integrated 957,500 - - 957,500 Alltel Corp 61,634 - - 61,634 1,606,800 74,773 - 1,681,573 AT&T Inc (a) 42,114 1,960 - 44,074 407,400 25,200 - 432,600 BellSouth Corp (a) 13,762 851 - 14,613 - 51,900 - 51,900 Citizens Communications Co (a) - 689 - 689 - 38,886 - 38,886 Royal KPN NV - 456 - 456 674,500 - - 674,500 Sprint Nextel Corp (a) 16,728 - - 16,728 1,596,900 26,814 - 1,623,714 Verizon Communications Inc (a) 52,746 886 - 53,632 186,984 4,842 - 191,826 0.10% Tobacco - 22,383 - 22,383 Altria Group Inc - 1,638 - 1,638 - 9,267 - 9,267 British American Tobacco PLC - 236 - 236 - 6,200 - 6,200 Loews Corp - Carolina Group - 318 - 318 - 11,800 - 11,800 Reynolds American Inc (a) - 1,293 - 1,293 - 3,485 - 3,485 0.02% Tools - Hand Held - 6,100 - 6,100 Black & Decker Corp - 571 - 571 0.02% Transport - Marine - 1,600 - 1,600 Brostrom AB - 35 - 35 - 7,100 - 7,100 General Maritime Corp - 236 - 236 - 161,000 - 161,000 Pacific Basin Shipping Ltd - 72 - 72 - 2,997 - 2,997 Smit Internationale NV - 265 - 265 - 608 - 608 0.95% Transport - Rail - 3,900 - 3,900 Burlington Northern Santa Fe Corp - 310 - 310 - 11,100 - 11,100 Norfolk Southern Corp - 600 - 600 361,800 - - 361,800 Union Pacific Corp 33,000 - - 33,000 33,000 910 - 33,910 1.20% Transport - Services 527,700 - - 527,700 United Parcel Service Inc Class B 42,781 - - 42,781 0.00% Trucking & Leasing - 3,600 - 3,600 Mullen Group Income Fund - 110 - 110 0.01% Water - 14,373 - 14,373 AWG PLC - 303 - 303 1.00% Wireless Equipment 1,553,200 - - 1,553,200 Nokia Oyj ADR 35,195 - - 35,195 TOTAL COMMON STOCKS 3,307,712 88,028 - 3,395,740 0.49% PREFERRED STOCKS 0.01% Cellular Telecommunications - 9,894 - 9,894 US Cellular Corp - 255 - 255 0.05% Commercial Banks - 35,300 - 35,300 Cobank ACB (c) - 1,641 - 1,641 - 10,500 - 10,500 Royal Bank of Scotland Group PLC - Series N - 251 - 251 - 1,892 - 1,892 0.02% Diversified Financial Services - 2,300 - 2,300 Citigroup Capital VII - 58 - 58 - 19,937 - 19,937 Citigroup Capital VIII - 498 - 498 - 556 - 556 0.05% Electric - Integrated - 17,400 - 17,400 Alabama Power Co Series II (b) - 403 - 403 - 7,556 - 7,556 Consolidated Edison Co of New York - 190 - 190 - 9,140 - 9,140 Dte Energy Trust I - 230 - 230 - 2,185 - 2,185 Energy East Capital Trust I - 55 - 55 - 39,580 - 39,580 Entergy Louisiana LLC - 1,004 - 1,004 - 1,882 - 1,882 0.01% Finance - Consumer Loans - 2,300 - 2,300 HSBC Finance Corp 6.000% - 52 - 52 - 11,000 - 11,000 HSBC Finance Corp 6.360% - 276 - 276 - 328 - 328 0.02% Finance - Investment Banker & Broker - 5,000 - 5,000 JP Morgan Chase Capital X - 126 - 126 - 700 - 700 Merrill Lynch Preferred Capital Trust I - 18 - 18 - 6,100 - 6,100 Merrill Lynch Preferred Capital Trust III - 154 - 154 - 4,100 - 4,100 Merrill Lynch Preferred Capital Trust IV - 104 - 104 - 2,800 - 2,800 Merrill Lynch Preferred Capital Trust V - 71 - 71 - 8,000 - 8,000 Morgan Stanley Capital Trust VI - 194 - 194 - 2,300 - 2,300 St Paul Capital Trust I - 57 - 57 - 724 - 724 0.03% Finance - Other Services - 2,300 - 2,300 ABN AMRO Capital Funding Trust V - 52 - 52 - 14,500 - 14,500 ABN AMRO Capital Funding Trust VII - 336 - 336 - 25,500 - 25,500 National Rural Utilities Cooperative Finance Corp 5.950% - 570 - 570 - 2,400 - 2,400 National Rural Utilities Cooperative Finance Corp 6.100% - 53 - 53 - 1,011 - 1,011 0.01% Financial Guarantee Insurance - 23,000 - 23,000 Financial Security Assurance Holdings Ltd 6.250% - 522 - 522 0.02% Gas - Distribution - 25,385 - 25,385 AGL Capital Trust II - 633 - 633 0.00% Life & Health Insurance - 3,400 - 3,400 PLC Capital Trust IV - 85 - 85 - 1,700 - 1,700 PLC Capital Trust V - 39 - 39 - 124 - 124 0.01% Money Center Banks - 8,000 - 8,000 JPMChase Capital XVI - 191 - 191 0.01% Mortgage Banks - 5,100 - 5,100 Abbey National PLC 7.250% - 128 - 128 0.05% Multi-line Insurance - 36,000 - 36,000 Aegon NV - 861 - 861 - 7,100 - 7,100 Hartford Capital III - 178 - 178 - 10,500 - 10,500 Metlife Inc 6.500% - 264 - 264 - 19,200 - 19,200 XL Capital Ltd 8.000% - 493 - 493 - 1,796 - 1,796 0.02% Pipelines - 33,457 - 33,457 TransCanada Pipelines Ltd - 848 - 848 0.01% Property & Casualty Insurance - 8,100 - 8,100 Berkley W R Capital Trust - 190 - 190 0.03% Regional Banks - 3,500 - 3,500 BAC Capital Trust III - 89 - 89 - 5,000 - 5,000 Fleet Capital Trust VII - 126 - 126 - 4,700 - 4,700 PNC Capital Trust D - 107 - 107 - 1,500 - 1,500 USB Capital V - 38 - 38 - 6,000 - 6,000 USB Capital VII - 134 - 134 - 26,100 - 26,100 Wells Fargo Capital IV - 657 - 657 - 1,151 - 1,151 0.01% Reinsurance - 3,600 - 3,600 Everest Re Capital Trust II - 78 - 78 - 2,600 - 2,600 PartnerRe Ltd - Series C - 63 - 63 - 6,500 - 6,500 PartnerRe Ltd - Series D - 150 - 150 - 291 - 291 0.03% REITS - Diversified - 41,547 - 41,547 Duke Realty Corp - Series L - 988 - 988 - 5,500 - 5,500 Vornado Realty Trust - Series H - 128 - 128 - 1,116 - 1,116 0.01% REITS - Office Property - 12,800 - 12,800 HRPT Properties Trust - Series B - 327 - 327 0.02% REITS - Shopping Centers - 15,000 - 15,000 Federal Realty Investment Trust - 380 - 380 - 1,600 - 1,600 Kimco Realty Corp - 39 - 39 - 14,800 - 14,800 Regency Centers Corp 7.25% - 371 - 371 - 790 - 790 0.01% REITS - Single Tenant - 21,000 - 21,000 Realty Income Corp - 525 - 525 0.02% REITS - Storage - 14,500 - 14,500 Public Storage Inc 6.450%; Seriex X - 325 - 325 - 19,000 - 19,000 Public Storage Inc 6.750% (a) - 449 - 449 - 774 - 774 0.00% REITS - Warehouse & Industrial - 2,800 - 2,800 AMB Property Corp; Series M - 66 - 66 - 1,800 - 1,800 First Industrial Realty Trust Inc - 44 - 44 - 110 - 110 0.04% Special Purpose Entity - 2,500 - 2,500 Corporate-Backed Trust Certificates - Series BER - 26 - 26 - 10,500 - 10,500 Corporate-Backed Trust Certificates - Series DCX - 242 - 242 - 5,800 - 5,800 Corporate-Backed Trust Certificates - Series JPM - 145 - 145 - 11,700 - 11,700 CORTS Trust for Safeco Capital Trust I - 320 - 320 - 1,700 - 1,700 CORTS Trust for Southern Co Capital Tr - 46 - 46 - 5,200 - 5,200 PreferredPlus Trust GSC-3 - 112 - 112 - 6,100 - 6,100 SATURNS - Series BLS - 152 - 152 - 1,400 - 1,400 SATURNS - Series GS4; 6.00% - 31 - 31 - 5,500 - 5,500 SATURNS - Series GS6; 6.00% - 122 - 122 - 2,300 - 2,300 SATURNS - Series JPM - 57 - 57 - 3,000 - 3,000 Trust Certificates Series 2001-3 - 74 - 74 - 1,327 - 1,327 0.00% Telephone - Integrated - 4,200 - 4,200 AT&T Inc - 106 - 106 0.00% Television - 3,800 - 3,800 CBS Corp - 92 - 92 TOTAL PREFERRED STOCKS - 17,689 - 17,689 Principal Principal Principal Principal Amount Amount Amount Amount Value Value Value Value (000s) (000s) (000s) (000s) (000s) (000s) (000s) (000s) 0.80% BONDS 0.32% Cable TV EchoStar Communcations Corp 11,650 - - 11,650 5.75%, 5/15/2008 11,548 - - 11,548 0.06% Electric - Integrated Georgia Power Capital Trust VI - 200 - 200 4.88%, 11/1/2042 - 197 - 197 Texas-New Mexico Power Co 2,000 - - 2,000 6.25%, 1/15/2009 2,018 - - 2,018 2,018 197 - 2,215 0.01% Finance - Investment Banker & Broker Merrill Lynch & Co Inc 500 - - 500 6.375%, 10/15/2008 513 - - 513 0.04% Medical - Drugs American Home Products Corp. 1,250 - - 1,250 7.25%, 3/1/2023 1,362 - - 1,362 0.01% Mortgage Banks Reilly Mortgage FHA 249 - - 249 7.43%, 8/1/2022 (e) 249 - - 249 0.01% Multi-line Insurance Allstate Financing II - 312 - 312 7.83%, 12/1/2045 - 327 - 327 0.03% Multimedia Westinghouse Electric Crop. 1,000 - - 1,000 7.875%, 9/1/2023 1,055 - - 1,055 0.04% Oil Company - Integrated Phillips 66 Capital Trust II - 1,475 - 1,475 8.00%, 1/15/2037 - 1,553 - 1,553 0.04% Pipelines KN Capital Trust III - 1,350 - 1,350 7.63%, 4/15/2028 - 1,404 - 1,404 0.12% Rental - Auto & Equipment Erac USA Finance Co 4,000 - - 4,000 7.35%, 6/15/2008 (c) 4,145 - 4,145 0.12% Telecommunication Services TELUS Corp 4,000 - - 4,000 8.00%, 6/1/2011 4,395 - 4,395 TOTAL BONDS 25,285 3,481 - 28,766 1.23% U.S. GOVERNMENT & GOVERNMENT AGENCY OBLIGATIONS 0.01% Federal Home Loan Mortgage Corporation (FHLMC) 211 - - 211 6.50%, 9/1/2030 215 - - 215 103 - - 103 7.00%, 9/1/2030 106 - - 106 321 - - 321 1.22% U.S. Treasury 30,000 - - 30,000 3.00%, 12/31/2006 29,621 - - 29,621 15,000 - - 15,000 4.25%, 11/15/2014 14,184 - - 14,184 43,805 - - 43,805 TOTAL U.S. GOVERNMENT & GOVERNMENT AGENCY OBLIGATIONS 44,126 - - 44,126 0.37% MONEY MARKET FUNDS (12.10%) - 13,299 - 13,299 BNY Institutional Cash Reserve Fund (d) - 13,299 - 13,299 TOTAL MONEY MARKET FUNDS - 13,299 - 13,299 5.61% SHORT TERM INVESTMENTS 200,715 - - 200,715 Mellon GSL DBT II Collateral Fund (d) 200,715 - 200,715 TOTAL SHORT TERM INVESTMENTS 200,715 - - 200,715 2.22% REPURCHASE AGREEMENTS 79,492 - - 79,492 Agreement with Credit Suissse First Boston Corp, 4.66% dated 4/28/2006, to be repurchased at $79,523 on 5/1/2006 (collateralized by U.S. Treasury obligations, having various interest rates and maturities, market value $81,182) TOTAL REPURCHASE AGREEMENTS 79,492 - - 79,492 105.62% Total Investments 3,657,330 122,497 - 3,779,827 -5.62% Liabilities in Excess of Other Assets, Net (188,418) (12,624) - (201,042) 100.00% TOTAL NET ASSETS 3,468,912 109,873 - 3,578,785 <FN> (a) Security or portion of the security was on loan at the end of the period (b) Non-Income Producing Security (c) Security exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be resold in transactionss exempt from registration, normally to qualified institutional buyers. Unless otherwise indicated, these securities are considered illiquid. At the end of the period, the value of these securites totaled $19,715 (in thousands) or 0.55% of net assets (d) Security was purchased with the cash proceeds from secuirties loans (e) Market value is determined in accordance with procedures established in good faith by the Board of Directors. At the end of the period, the value of these securities totaled $249 (in thousands) or 0.01% of net assets. (f) Foreign shares Unrealized Appreciation (Depreciation) Unrealized Appreciation 592,119 12,400 - 604,519 Unrealized Depreciation (17,229) (2,341) - (19,570) Net Unrealized Appreciation (Depreciation) 574,890 10,059 - 584,949 Cost for federal income tax purposes 3,082,440 112,438 - 3,194,878 As of April 30, 2006, all securities held by the Acquired Funds would comply with the investment restrictions of the Acquiring Fund. </FN> Schedule of Investments April 30, 2006 (unaudited) WM Tax- PIF Tax- PIF Tax- WM Tax- PIF Tax- PIF Tax- Exempt Exempt Exempt Exempt Exempt Exempt Bond Bond Bond Bond Bond Bond Fund Fund Fund I Combined Fund Fund Fund I Combined Principal Principal Principal Principal Amount Amount Amount Amount Value Value Value Value (000s) (000s) (000s) (000s) (000s) (000s) (000s) (000s) 97.30% TAX-EXEMPT BONDS 0.28% Alabama Birmingham Baptist Medical Center, Special Care Facilities Financing Authority 1,000 1,000 5.00%, 11/15/2030 976 0 0 976 - - 2.98% Alaska Alaska Housing Finance Corp FGIC 1,000 1,000 5.25%, 12/ 1/2034 0 1047 0 1047 - - 1,000 1,000 5.25%, 12/1/2041 1041 0 0 1041 - - City of Anchorage AK 2,000 2,000 6.375% 1/1/2020 2186 0 0 2186 - - City of Anchorage AK MBIA 1,235 1,235 6.50%, 12/1/2013 1430 0 0 1430 - - State of Alaska AMBAC 4,500 4,500 5.25%, 10/1/2027 4849 0 0 4849 - - 9506 1047 0 10553 2.03% Arizona Arizona State University/AZ AMBAC 1,500 1,500 5.25%, 9/ 1/2024 0 1587 0 1587 - - Arizona Tourism & Sports Authority MBIA 2,000 2,000 5.375%, 7/1/2019 2143 0 0 2143 - - Maricopa County AZ 1,000 1,000 5.00%, 4/1/2035 992 0 0 992 - - University Medical Center Corp/AZ 1,000 1,000 5.00%, 7/ 1/2022 0 1008 0 1008 - - 1,500 1,500 5.00%, 7/1/2035 1481 0 0 1481 - - 4616 2595 0 7211 0.29% Arkansas University of Arkansas FGIC 1,000 1,000 5.00%, 3/ 1/2021 0 1048 0 1048 - - 11.45% California Amador Water Agency/CA MBIA 3,505 3,505 5.00%, 6/ 1/2027 0 3623 0 3623 - - California County TOB Securitization Agency 1,000 1,000 5.125%, 6/1/2038 975 0 0 975 - - California Educational Facilities Authority 1,000 1,000 5.00%, 9/1/2033 1027 0 0 1027 - - California Health Facilities Financing Authority/CA 2,000 2,000 5.00%, 11/15/2034 2014 0 0 2014 - - California Pollution Control Financing AMBAC 1,750 1,750 3.13%, 1/ 1/2022 0 1750 0 1750 - - California State Department of Water Resources MBIA-IBC 3,000 3,000 6.466%, 5/1/2011 (a)(b) 3532 0 0 3532 - - California Statewide Communities Development Authority 1,000 1,000 3.85%, 11/ 1/2029 0 974 0 974 - - 1,000 1,000 5.00%, 3/1/2035 1003 0 0 1003 - - Clovis Public Financing Authority MBIA 2,000 2,000 5.25%, 8/ 1/2030 0 2114 0 2114 - - East Side Union High School District - Santa Clara County MBIA 1,000 1,000 5.10%, 2/ 1/2019 0 1074 0 1074 - - Foothill Eastern Transportation Corridor Agency/CA MBIA 2,000 2,000 0.00%, 1/15/2018 (c) 1100 0 0 1100 - - Fremont Unified School District/Alameda County CA FGIC 1,000 1,000 5.00%, 8/1/2025 1033 0 0 1033 - - Golden State Tobacco Securitization Corp FGIC 500 500 5.50%, 6/ 1/2043 0 546 0 546 - Jurupa Unified School District FGIC 2,700 2,700 5.125%, 8/1/2022 2842 0 0 2842 - - Los Angeles County Public Works Financing MBIA 1,000 1,000 5.00%, 12/ 1/2027 0 1032 0 1032 - - Placentia-Yorba Linda Unified School District FGIC 2,925 2,925 5.00%, 10/ 1/2023 0 3041 0 3041 - - 2,000 2,000 5.00%, 10/ 1/2030 0 2057 0 2057 - - San Diego Redevelopment Agency/CA XLCA 1,775 1,775 5.00%, 9/ 1/2023 0 1832 0 1832 - - San Francisco City & County International Airports Commission FGIC 2,000 2,000 5.125%, 5/1/2020 2090 0 0 2090 - - San Joaquin Hills Transportation Corridor Agency MBIA 7,000 7,000 0.00%, 1/15/2034 (c) 1767 0 0 1767 - - State of California 2,000 2,000 5.25%, 11/ 1/2025 0 2101 0 2101 - - 2,000 2,000 5.50%, 4/ 1/2028 0 2165 0 2165 - - Tobacco Securitization Authority of Northern California/CA 1,000 1,000 5.375%, 6/1/2038 1007 0 0 1007 - - 18390 22309 0 40699 1.82% Colorado Colorado Health Facilities Authority 1,250 1,250 5.00%, 12/1/2035 1221 0 0 1221 - - Denver City & County CO 555 555 4.75%, 9/ 1/2020 0 536 0 536 - - Fort Collins CO AMBAC 2,275 2,275 5.38%, 6/ 1/2023 0 2431 0 2431 - - Lakewood CO AMBAC 1,650 1,650 5.35%, 12/1/2017 1760 0 0 1760 - - Park Creek Metropolitan District/CO 500 500 5.50%, 12/1/2030 512 0 0 512 - - 3493 2967 0 6460 1.34% Connecticut Connecticut State Development Authority 3,000 3,000 5.95%, 9/ 1/2028 0 3139 0 3139 - - State of Connecticut ACA 1,500 1,500 6.60%, 7/1/2024 1637 0 0 1637 - - 1637 3139 0 4776 0.16% District of Columbia District of Columbia, Water & Sewer Authority FSA 500 500 5.50%, 10/1/2017 557 0 0 557 - - 5.31% Florida Bay Laurel Center Community Development District 500 500 5.45%, 5/1/2037 (d) 500 0 0 500 - - City of Gainesville FL 270 270 5.20%, 10/ 1/2026 0 277 0 277 - - County of Orange FL AMBAC 3,000 3,000 5.50%, 10/ 1/2032 0 3201 0 3201 - - Escambia County Health Facilities Authority AMBAC 110 110 5.95%, 7/1/2020 116 0 0 116 - - Escambia County Utilities Authority FGIC 650 650 5.25%, 1/1/2029 674 0 0 674 - - Florida Housing Finance Agency AMBAC 900 900 6.50%, 7/1/2036 920 0 0 920 - - Florida State Board of Education FGIC 800 800 5.25%, 7/1/2017 843 0 0 843 - - Hillsborough County Port District MBIA 1,000 1,000 5.375%, 6/1/2027 1049 0 0 1049 - - Manatee County Housing Finance Authority GNMA/FNMA 65 6.875%, 11/1/2026 68 0 0 68 - - 65 Orange County Housing Finance Authority 500 500 7.00%, 10/1/2025 (b) 535 0 0 535 - - Orange County School Board MBIA 310 310 5.38%, 8/ 1/2022 0 319 0 319 - - Orlando Utilities Commission 5,000 5,000 6.00%, 10/1/2020 5456 0 0 5456 - - Osceola County School Board AMBAC 1,300 1,300 5.125%, 6/1/2022 1360 0 0 1360 - - South Broward Hospital District/FL MBIA 2,000 2,000 5.00%, 5/ 1/2021 0 2093 0 2093 - - West Villages Improvement District 160 160 5.50%, 5/ 1/2037 0 160 0 160 - - University of Central Florida Athletics Association Inc FGIC 1,275 1,275 5.00%, 10/01/2035 1309 0 0 1309 - - 12830 6050 0 18880 3.60% Georgia State of Georgia 5,000 5,000 6.30%, 3/1/2009 5349 0 0 5349 - - Monroe County Development Authority/GA MBIA-IBC 2,500 2,500 6.70%, 1/1/2009 2684 0 0 2684 - - 3,410 3,410 6.75%, 1/1/2010 3750 0 0 3750 - - Richmond County Development Authority 1,000 1,000 5.00%, 2/ 1/2020 0 1006 0 1006 - - 11783 1006 0 12789 0.62% Hawaii City & County of Honolulu HI 1,270 1,270 6.00%, 1/1/2012 1402 0 0 1402 - - 730 730 6.00%, 1/1/2012 810 0 0 810 - - 2212 0 0 2212 1.42% Idaho Idaho Health Facilities Authority/ID 2,000 2,000 6.65%, 2/15/2021 (a)(b) 2503 0 0 2503 - - 2,000 2,000 5.25%, 9/ 1/2025 0 2095 0 2095 - - Idaho Housing & Finance Association/ID 440 440 5.90%, 1/ 1/2015 0 445 0 445 - - 2503 2540 0 5043 8.13% Illinois Chicago Board of Education/IL MBIA 1,290 1,290 6.00%, 12/ 1/2018 0 1455 0 1455 - - 1,270 1,270 5.50%, 12/ 1/2021 0 1384 0 1384 - - 1,540 1,540 6.00%, 12/ 1/2021 0 1730 0 1730 - - Chicago, O'Hare International Airport/IL 1,000 1,000 6.586%, 1/1/2023 (a)(b) 1129 0 0 1129 - - 1,125 1,125 6.586, 1/1/2024 (a)(b) 1267 0 0 1267 - - 5,000 5,000 7.55%, 1/1/2020 (a)(b) 5888 0 0 5888 - - 965 965 5.50%, 1/1/2017 1027 0 0 1027 - - City of Chicago IL 825 825 6.30%, 9/ 1/2029 0 838 0 838 - - City of Yorkville IL 500 500 6.00%, 3/1/2036 498 0 0 498 - - County of Cook IL MBIA 2,000 2,000 5.25%, 11/15/2028 0 2117 0 2117 - - Illinois Finance Authority 1,500 1,500 5.25%, 11/15/2023 0 1528 0 1528 - - 500 500 6.00%, 5/15/2025 517 0 0 517 - - 500 500 5.625, 2/15/2037 505 0 0 505 - - Illinois Finance Authority Multi-Family Revenue 160 160 6.50%, 12/ 1/2037 0 159 0 159 - - Illinois Health Facilities Authority 320 320 5.25%, 8/15/2008 0 333 0 333 - - 145 145 7.00%, 2/15/2009 0 153 0 153 - - 1,500 1,500 6.00%, 7/ 1/2017 0 1605 0 1605 - - 720 720 7.00%, 2/15/2018 0 849 0 849 - - Metropolitan Pier & Exposition Authority/IL FGIC 5,055 5,055 0.00%, 6/15/2009 (c) 4482 0 0 4482 - - Village of Bolingbrook IL 500 500 0.00%, 1/1/2024 (c) 455 0 0 455 - - Village of Pingree Grove 800 800 5.25%, 3/1/2015 805 0 0 805 - - Yorkville IL United City Special Services Area Special Tax 160 160 6.00%, 3/ 1/2036 0 159 0 159 - - 16573 12310 0 28883 2.94% Indiana County of St Joseph IN 230 230 6.00%, 5/15/2026 240 0 0 240 - - 100 100 6.00%, 5/15/2038 0 103 0 103 - - Hendricks County Building Facilities Co 2,500 2,500 5.50%, 7/15/2020 0 2702 0 2702 - - Indiana Housing Finance Authority 895 895 3.60%, 1/ 1/2032 0 882 0 882 - - Indiana Municipal Power Agency/IN MBIA 6,000 6,000 6.125%, 1/1/2013 6520 0 0 6520 - - 6760 3687 0 10447 1.79% Iowa Chillicothe IA 1,100 1,100 3.60%, 11/ 1/2023 0 1079 0 1079 - - Eddyville IA 1,000 1,000 5.63%, 12/ 1/2013 0 1002 0 1002 - - Iowa Higher Education Loan Authority/IA 2,235 2,235 5.50%, 10/ 1/2031 0 2290 0 2290 - - Lansing IA 1,000 1,000 3.60%, 11/ 1/2008 0 970 0 970 - - Tobacco Settlement Authority Iowa/IA 1,000 1,000 5.50%, 6/1/2042 1009 0 0 1009 - - 1009 5341 0 6350 2.23% Kansas City of Topeka KS XLCA 5,490 5,490 5.25%, 8/ 1/2035 0 5835 0 5835 - - Sedgwick & Shawnee Counties KS 1,955 1,955 5.65%, 6/ 1/2037 0 2080 0 2080 - - 0 7915 0 7915 0.80% Kentucky Adair County School District Finance Co 2,745 2,745 5.10%, 9/ 1/2020 0 2861 0 2861 - - 2.18% Louisiana Ernest N Morial-New Orleans Exhibit Hall Authority/LA AMBAC 2,000 2,000 5.00%, 7/15/2033 2021 0 0 2021 - - Lafayette LA MBIA 2,680 2,680 5.25%, 11/1/2023 2847 0 0 2847 - - Louisiana Public Facilities Authoriy 1,500 1,500 0.00%, 12/1/2019 (c) 800 0 0 800 - - Louisiana State Citizens Property Insurance AMBAC 2,000 2,000 5.00%, 6/ 1/2022 0 2080 0 2080 - - 5668 2080 0 7748 1.08% Maryland City of Baltimore MD 2,000 2,000 6.50%, 10/1/2011 2091 0 0 2091 - - County of Prince Georges MD 500 500 5.20%, 7/1/2034 502 0 0 502 - - Maryland State Economic Development Corp 1,150 1,150 5.625%, 6/1/2035 1257 0 0 1257 - - 3850 0 0 3850 1.46% Massachusetts Massachusetts Bay Transportation Authority 2,000 2,000 5.00%, 7/1/2035 2048 0 0 2048 - - Massachusetts State Development Finance Agency 1,000 1,000 6.375%, 7/1/2029 1007 0 0 1007 - - Massachusetts State Health & Educational Facilities Authority 1,000 1,000 6.00%, 7/1/2031 1056 0 0 1056 - - 1,100 1,100 5.00%, 7/1/2033 1091 0 0 1091 - - 5202 0 0 5202 3.74% Michigan Kent Hospital Finance Authority/MI 1,000 1,000 5.25%, 7/1/2030 995 0 0 995 - - Michigan State Hospital Finance Authority 1,275 1,275 6.00%, 12/ 1/2013 0 1390 0 1390 - - 160 160 5.25%, 8/15/2023 0 152 0 152 - - Michigan State Housing Development Authority MBIA 2,290 2,290 5.13%, 6/ 1/2011 0 2341 0 2341 - - Michigan State Trunk Line/MI FSA 1,000 1,000 5.25%, 10/ 1/2021 0 1059 0 1059 - - Michigan State Strategic Fund 2,000 2,000 5.45%, 9/ 1/2029 0 2045 0 2045 - - Michigan State Strategic Fund XLCA 1,000 1,000 5.45%, 12/15/2032 1048 0 0 1048 - - Midland County Economic Development Corp 160 160 6.88%, 7/23/2009 0 160 0 160 - - Saginaw Hospital Finance Authority/MI Covenant Medical Center 2,050 2,050 6.50%, 7/ 1/2030 0 2235 0 2235 - - Summit Academy North 160 160 5.00%, 11/ 1/2015 0 154 0 154 - - Walled Lake Consolidated School District MBIA 1,625 1,625 5.25%, 5/ 1/2022 0 1729 0 1729 - - 2043 11265 0 13308 0.64% Minnesota Minnesota State Municipal Power Agency 1,000 1,000 5.25%, 10/ 1/2021 0 1056 0 1056 - - St. Paul Housing & Redevelopment Authority/MN 1,000 1,000 6.00%, 11/15/2030 1072 0 0 1072 - - St Paul Port Authority Tax 160 160 6.00%, 3/ 1/2030 (d) 0 160 0 160 - - 1072 1216 0 2288 0.34% Mississippi Biloxi Housing Authority/MS 150 150 6.25%, 9/ 1/2031 0 154 0 154 - - State of Mississippi FSA 480 480 5.75%, 12/ 1/2013 0 507 0 507 - - 505 505 5.75%, 12/ 1/2014 0 532 0 532 - - 0 1193 0 1193 1.88% Missouri Cape Girardeau County Industrial Development Authority/MO 1,000 1,000 5.625, 6/1/2027 1024 0 0 1024 - - Cape Girardeau County Building Corp/MO MBIA 1,000 1,000 5.25%, 3/ 1/2026 0 1068 0 1068 - - Carthage MO 160 160 5.88%, 4/ 1/2030 0 160 0 160 - - 750 750 6.00%, 4/1/2038 749 0 0 749 - - City of Fenton MO 575 575 7.00%, 10/1/2021 657 0 0 657 - - Missouri Housing Development Commission 720 720 5.05%, 9/ 1/2024 0 729 0 729 - - Missouri State Health & Education Facilities Authority MO 1,000 1,000 5.00%, 11/1/2018 1042 0 0 1042 - - 1,200 1,200 5.00%, 5/15/2020 0 1239 0 1239 - - 3472 3196 0 6668 0.28% Montana City of Forsyth MT 1,000 1,000 4.65%, 8/1/2023 (d) 1003 0 0 1003 - - 0.61% Nebraska Omaha Public Power District 2,000 2,000 6.15%, 2/1/2012 2179 0 0 2179 - - 0.63% Nevada County of Clark NV 160 160 5.90%, 11/ 1/2032 0 160 0 160 - - County of Clark NV FGIC 1,000 1,000 5.00%, 7/1/2036 1020 0 0 1020 - - Reno NV AMBAC 1,000 1,000 5.125%, 6/1/2037 1067 0 0 1067 - - 2087 160 0 2247 0.60% New Hampshire New Hampshire Health & Education Facility FSA 2,000 2,000 5.50%, 8/ 1/2027 0 2145 0 2145 - - 3.66% New Jersey Bergen County Improvement Authority 2,000 2,000 5.00%, 4/1/2032 2076 0 0 2076 - - New Jersey Economic Development Authority 500 500 5.63%, 6/15/2019 0 524 0 524 - - 2,000 2,000 5.25%, 3/ 1/2024 0 2116 0 2116 - - 160 160 5.13%, 7/ 1/2025 0 151 0 151 - - 1,000 1,000 5.75%, 4/1/2031 1086 0 0 1086 - - 1,000 1,000 5.50%, 6/15/2031 1037 0 0 1037 - - New Jersey Economic Development Authority FGIC 525 525 5.00%, 6/15/2011 0 551 0 551 - - New Jersey State Educational Facilities Authority/NJ AMBAC 1,340 1,340 5.25%, 9/1/2020 1425 0 0 1425 - - New Jersey State Turnpike Authority AMBAC 2,000 2,000 5.00%, 1/1/2035 2047 0 0 2047 - - New Jersey State Turnpike Authority FGIC 2,000 2,000 3.76%, 1/ 1/2018 (a) 0 2001 0 2001 - - 7671 5343 0 13014 6.06% New York City of New York NY 750 750 6.25%, 8/ 1/2008 0 765 0 765 - - 3,000 3,000 5.00%, 8/ 1/2025 0 3086 0 3086 - - Metropolitan Transportation Authority 1,265 1,265 4.75%, 7/1/2019 1327 0 0 1327 - - Metropolitan Transportation Authority FGIC 1,500 1,500 5.25%, 11/15/2031 1580 0 0 1580 - - Nassau County Tobacco Settlement Corporation 500 500 5.00%, 6/1/2035 485 0 0 485 - - 500 500 5.125%, 6/1/2046 486 0 0 486 - - New York City Industrial Development Agency 1,000 1,000 6.25%, 3/1/2015 1050 0 0 1050 - - 800 800 7.625%, 8/1/2025 877 0 0 877 - - New York City Municipal Water Finance Authority MBIA 2,500 2,500 6.005%, 6/15/2027 (a)(b) 2691 0 0 2691 - - New York State Mortgage Agency 525 525 5.65, 4/1/2030 529 0 0 529 - - New York State Dormitory Authority 1,000 1,000 5.50%, 7/1/2026 1011 0 0 1011 - - 160 160 5.50%, 7/ 1/2030 0 156 0 156 - - New York State Dormitory Authority MBIA 1,000 1,000 6.00%, 5/15/2016 1094 0 0 1094 - - 1,500 1,500 5.25%, 10/ 1/2023 0 1591 0 1591 - - New York State Housing Finance Agency AMT 415 415 6.625%, 8/15/2012 416 0 0 416 - - State of New York GO 1,000 1,000 5.75%, 3/15/2013 1081 0 0 1081 - - Tobacco Settlement Financing Authority AMBAC 2,200 2,200 5.25%, 6/ 1/2021 0 2324 0 2324 - - TSASC Inc/NY 1,000 1,000 5.125%, 6/1/2042 976 0 0 976 - - 13603 7922 0 21525 1.18% North Carolina City of Charlotte NC 1,000 1,000 5.50%, 8/1/2019 1076 0 0 1076 - - Fayetteville Public Works Commission/NC FSA 1,000 1,000 3.79%, 3/ 1/2024 (a) 0 1000 0 1000 - - North Carolina Municipal Power Agency No 1 Catawba/NC MBIA 2,000 2,000 5.25%, 1/1/2018 2118 0 0 2118 - - 3194 1000 0 4194 1.48% Ohio Adams County Hospital 1,000 1,000 6.25%, 9/1/2020 1006 0 0 1006 - - County of Cuyahoga OH 1,000 1,000 7.50%, 1/1/2030 1102 0 0 1102 - - Ohio State Turnpike Commission 2,000 2,000 5.50%, 2/15/2026 0 2122 0 2122 - - Ohio State University 1,000 1,000 5.125%, 12/1/2031 1032 0 0 1032 - - 3140 2122 0 5262 0.07% Oklahoma Oklahoma Housing Finance Authority GNMA 230 230 7.997%, 8/1/2018 243 0 0 243 - - 1.43% Oregon City of Portland OR AMBAC 1,000 1,000 5.75%, 6/15/2016 1082 0 0 1082 - - City of Portland OR FSA 2,000 2,000 5.25%, 6/1/2020 2122 0 0 2122 - - Oregon Health Sciences University MBIA 1,000 1,000 5.25%, 7/1/2022 1059 0 0 1059 - - Oregon State Housing & Community Service 790 790 5.65%, 7/ 1/2028 0 802 0 802 - - 4263 802 0 5065 4.08% Pennsylvania Central Dauphin School District MBIA 1,000 1,000 6.75%, 2/ 1/2024 (d) 0 1205 0 1205 - - City of Philadelphia PA FSA 2,405 2,405 6.62%, 7/1/2011 (a)(b) 2695 0 0 2695 - - 2,500 2,500 5.25%, 7/1/2029 2607 0 0 2607 - - Fulton County Industustial Development Authority Hospital Revenue 160 160 5.90%, 7/ 1/2040 0 160 0 160 - - Pennsylvania Economic Development Financing 1,000 1,000 5.10%, 10/ 1/2027 0 999 0 999 - - Pennsylvania State University 1,000 1,000 5.00%, 9/ 1/2029 0 1032 0 1032 - - Philadelphia Authority for Industrial Development 160 160 6.25%, 5/ 1/2033 0 159 0 159 - - Philadelphia Parking Authority AMBAC 820 820 5.25%, 2/15/2029 849 0 0 849 - - Philadelphia Redevelopment Authority FGIC 1,000 1,000 5.50%, 4/15/2017 1072 0 0 1072 - - Westmoreland County Municipal Authority FSA 3,490 3,490 5.25%, 8/15/2027 3717 0 3717 - - 7223 7272 0 14495 0.30% Puerto Rico Puerto Rico Municipal Finance Agency FSA 1,000 1,000 5.25%, 8/1/2021 1064 0 0 1064 - - 1.22% South Carolina Lexington One School Facilities Corp 1,000 1,000 5.25%, 12/ 1/2029 0 1033 0 1033 - - South Carolina Jobs-Economic Development Authority AMBAC 1,000 1,000 5.20%, 11/1/2027 1053 0 0 1053 - - South Carolina Jobs-Economic Development CIFG 2,200 2,200 5.00%, 11/ 1/2030 0 2247 0 2247 - - 1053 3280 0 4333 0.36% South Dakota South Dakota Health & Educational Facilities Authority/SD 1,250 1,250 5.25%, 11/1/2034 1283 0 0 1283 - - 0.95% Tennessee Chattanooga Health Educational & Housing Facility Board/TN 590 590 5.50%, 10/1/2020 591 0 0 591 - - Johnson City Health & Educational Facilities Board 1,000 1,000 7.50%, 7/1/2033 1157 0 0 1157 - - 500 500 5.50%, 7/1/2036 518 0 0 518 - - Shelby County Health Educational & Housing Facilities Board 500 500 5.625%, 9/1/2026 496 0 0 496 - - Tennessee Housing Development Agency/TN AMT 625 625 5.70%, 7/1/2031 627 0 0 627 - - 3389 0 0 3389 7.11% Texas Alliance Airport Authority/TX 500 500 1,000 4.85%, 4/ 1/2021 (d) 496 494 0 990 - Brazos River Authority AMBAC 2,000 2,000 5.13%, 5/ 1/2019 0 2069 0 2069 - - City of San Antonio TX FSA 2,090 2,090 5.50%, 5/15/2017 0 2243 0 2243 - - City of Houston TX AMBAC 1,000 1,000 5.75%, 9/1/2015 1087 0 0 1087 - - City of Houston TX FSA 85 5.75%, 3/1/2015 91 0 0 91 - - 85 Dallas-Fort Worth International Airport Board 1,500 1,500 5.50%, 11/1/2031 1569 0 0 1569 - - Dallas-Fort Worth International Airport XLCA 2,000 2,000 5.00%, 11/ 1/2012 0 2059 0 2059 - - Harris County-Houston Sports Authority MBIA 2,000 2,000 5.25%, 11/15/2040 2070 0 0 2070 - - Lower Colorado River Authority FGIC 1,000 1,000 5.00%, 5/15/2033 1014 0 0 1014 - - Metro Health Facilities Development Corp/TX 1,100 1,100 7.20%, 1/1/2021 1136 0 0 1136 - - North Central Texas Health Facilities Development Corp 1,000 1,000 5.125%, 5/15/2029 1013 0 0 1013 - - 1,000 1,000 5.25%, 8/15/2032 AMBAC 1038 0 0 1038 - - Red River Authority/TX MBIA 1,000 1,000 6.00%, 6/ 1/2020 0 1021 0 1021 - - San Marcos Consolidated Independent School District 2,020 2,020 5.63%, 8/ 1/2025 0 2211 0 2211 - - Sea Breeze Public Facility Corp 100 100 6.50%, 1/ 1/2046 0 100 0 100 - - Texas State Department Of Housing & Community Affairs 2,315 2,315 5.70%, 1/ 1/2033 0 2394 0 2394 - - Texas Tech University MBIA 1,000 1,000 5.00%, 8/15/2025 1059 0 0 1059 - - University of Texas/TX 2,000 2,000 5.25%, 8/15/2019 2113 0 0 2113 - - 12686 12591 0 25277 1.20% Virginia Tobacco Settlement Financing Corp/VA 2,690 2,690 5.25%, 6/ 1/2019 0 2739 0 2739 - - 1,000 1,000 5.625%, 6/1/2037 1023 0 0 1023 - - Virginia Beach Development Authority 500 500 5.375%, 11/1/2032 506 0 0 506 - - 1529 2739 0 4268 4.25% Washington Franklin County Pasco School District No 1 FSA 5,000 5,000 5.25%, 12/1/2019 5307 0 0 5307 - - Grant County Public Utility District FGIC 1,550 1,550 5.00%, 1/ 1/2024 0 1602 0 1602 - - King County Kent School District No 415 WA 4,500 4,500 6.30%, 12/1/2008 4692 0 0 4692 - - State of Washington 3,000 3,000 6.40%, 6/1/2017 3494 0 0 3494 - - 13493 1602 0 15095 1.85% West Virginia County of Braxton WV 2,000 2,000 6.13%, 4/ 1/2026 0 2069 0 2069 - - Harrison County Community MBIA-IBC 2,500 2,500 6.875%, 4/15/2022 2506 0 0 2506 - - Pleasants County W V Industrial Development MBIA 2,000 2,000 6.15%, 5/ 1/2015 0 2017 0 2017 - - 2506 4086 0 6592 1.47% Wisconsin County of Milwaukee WI FSA 4,000 4,000 5.25%, 12/ 1/2025 0 4206 0 4206 - - Wisconsin Health & Educational Facilities Authority 600 600 6.00%, 8/15/2019 626 0 0 626 - - 380 380 7.125%, 8/15/2007 AMBAC 381 0 0 381 - - 1007 4206 0 5213 TOTAL TAX-EXEMPT BONDS 196768 149035 0 345803 0.09% CONVERTIBLE BOND 0.09% UAL Corp 317 317 5.00%, 2/1/2021 329 0 0 329 - - TOTAL CONVERTIBLE BONDS 329 0 0 329 Shares Shares Shares Shares Held Held Held Held 0.73% OTHERS 0.73% Tax-Exempt Money Market 1,400 1,400 BlackRock Liquidity Funds MuniFund Port 0 1400 0 1400 - - 1,200 1,200 Merrill Lynch Funds For Institutions 0 1200 0 1200 - - Series - Institutional Tax-Exempt Fund TOTAL OTHERS 0 2600 0 2600 98.12% Total Investments 197097 151635 0 348732 1.88% Other Assets in Excess of Liabilities, 2042 4636 0 6678 Net 100.00% TOTAL NET ASSETS 199139 156271 0 355410 <FN> (a) Variable Rate (b) Security is illiquid. (c) Non-Income Producing Security (d) Security purchased on a when-issued basis. Unrealized Appreciation (Depreciation) Unrealized Appreciation 11105 1747 0 12852 Unrealized Depreciation -289 -806 0 -1095 Net Unrealized Appreciation 10816 941 0 11757 (Depreciation) Cost for federal income tax purposes 186281 150694 0 336975 </FN> SCHEDULE OF FUTURES CONTRACTS Number of Number of Number of Type Original Current Market Unrealized Contracts Contracts Contracts Value Value (000s) Appreciation/ (000s) (Depreciation) (000s) Sell: 89 - 89 U.S. 5 Year Treasury Note, June 2006 $ 9347 $ 9270 $ 0 $ 77 41 - 41 U.S. 10 Year Treasury Note, June 2006 4340 4329 0 11 As of April 30, 2006, all securities held by the Acquired Funds would comply with the investment restrictions of the Acquiring Fund. Pro Forma Notes to Financial Statements April 30, 2006 (unaudited) 1. Description of the Funds Equity Income Fund I and Tax-Exempt Bond Fund I (the "Acquiring Funds"), are series of Principal Investors Fund, Inc. (the "Fund"). The Fund is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company. 2. Basis of Combination On September 11, 2006, the Board of Directors of PIF Equity Income Fund and PIF Tax-Exempt Bond Fund (the "Acquired Funds") approved a Plan of Reorganization whereby, subject to approval by the shareholders of each Acquired Fund, PIF Equity Income Fund I and PIF Tax-Exempt Bond Fund I, respectively, will acquire all the assets of each Acquired Fund subject to the liabilities of such Acquired Fund, in exchange for a number of shares equal in value to the pro rata net assets of shares of the Acquired Funds (the "Reorganization"). In addition, PIF Equity Income Fund I and PIF Tax-Exempt Bond Fund I will acquire all of the assets of WM Equity Income Fund and WM Tax-Exempt Bond Fund (each a "WM Acquired Fund"), respectively, subject to the liabilities of WM Equity Income Fund and WM Tax-Exempt Bond Fund (the "WM Reorganization") The Reorganization will be accounted for as a tax-free reorganization of investment companies. The pro forma combined financial statements are presented for the information of the reader and may not necessarily be representative of what the actual combined financial statements would have been had the Reorganization and the WM Reorganization occurred at April 30, 2006. The unaudited pro forma schedules of investments and statements of assets and liabilities reflect the financial position of the WM Acquired Fund, the Acquired Funds and the Acquiring Funds at April 30, 2006. The unaudited pro forma statements of operations reflect the results of operations of the WM Acquired Fund, the Acquired Funds and the Acquiring Funds for the twelve months ended April 30, 2006. The statements have been derived from the funds' respective books and records utilized in calculating daily net asset value at the dates indicated above for the WM Acquired Fund, the Acquired Funds and the Acquiring Funds under U.S. generally accepted accounting principles. The historical cost of investment securities will be carried forward to the surviving entity and results of operations of the Acquiring Funds for pre-combination periods will not be restated. The pro forma schedules of investments and statements of assets and liabilities and operations should be read in conjunction with the historical financial statements of the Acquired Funds and the Acquiring Funds incorporated by reference in the Statements of Additional Information. Principal Management Corp. has agreed to pay the expenses of the Reorganization so the Principal Investors Fund, Inc. shareholders will not bear these costs. 3. Significant Accounting Policies The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Pro Forma Notes to Financial Statements (continued) April 30, 2006 (unaudited) 4. Security Valuation Investments in securities in the pro forma financial statements are valued in accordance with the descriptions in their respective prospectus and statements of additional information. The Acquiring Funds value securities for which market quotations are readily available at market value, which is determined using the last reported sale price. If no sales are reported, as is regularly the case for some securities traded over-the-counter, securities are valued using the last reported bid price or an evaluated bid price provided by a pricing service. Pricing services use electronic modeling techniques that incorporate security characteristics, market conditions and dealer-supplied valuations to determine an evaluated bid price. When reliable market quotations are not considered to be readily available, which may be the case, for example, with respect to restricted securities, certain debt securities, preferred stocks, and foreign securities, the investments are valued at their fair value as determined in good faith by Principal Management Corporation (the "Manager") under procedures established and periodically reviewed by the Fund's Board of Directors. The value of foreign securities used in computing the net asset value per share is generally determined as of the close of the foreign exchange where the security is principally traded. Events that occur after the close of the applicable foreign market or exchange but prior to the calculation of the Funds' net asset values are ordinarily not reflected in the Funds' net asset values. If events that occur after the close of the applicable foreign market or exchange but prior to the calculation of the Funds' net asset values are determined to materially affect the value of a foreign security, then the security is valued at its fair value as determined in good faith by the Manager under procedures established and periodically reviewed by the Fund's Board of Directors. Many factors are reviewed in the course of making a good faith determination of a security's fair value, including, but not limited to, price movements in ADRs, futures contracts, industry indices, general indices, and foreign currencies. To the extent the Funds invest in foreign securities listed on foreign exchanges which trade on days on which the Funds do not determine net asset values, for example weekends and other customary national U.S. holidays, the Funds' net asset values could be significantly affected on days when shareholders cannot purchase or redeem shares. Certain securities issued by companies in emerging market countries may have more than one quoted valuation at any given point in time, sometimes referred to as a "local" price and a "premium" price. The premium price is often a negotiated price, which may not consistently represent a price at which a specific transaction can be effected. It is the policy of the Funds to value such securities at prices at which it is expected those shares may be sold, and the Manager or any sub-advisor is authorized to make such determinations subject to such oversight by the Fund's Board of Directors as may occasionally be necessary. Short-term securities are valued at amortized cost, which approximates market. Under the amortized cost method, a security is valued by applying a constant yield to maturity of the difference between the principal amount due at maturity and the cost of the security to the Funds. 5. Currency Translation The Acquiring Funds' foreign holdings are translated to U.S. dollars using the exchange rate at the daily close of the London Exchange. The identified cost of the Funds' holdings are translated at approximate rates prevailing when acquired. Income and expense amounts are translated at approximate rates prevailing when received or paid, with daily accruals of such amounts reported at approximate rates prevailing at the date of valuation. Since the carrying amount of the foreign securities is determined based on the exchange rate and market values at the close of the period, it is not practicable to isolate that portion of the results of operations arising as a result of changes in the foreign exchange rates from the fluctuations arising from changes in the market prices of securities during the period. Net realized foreign exchange gains or losses arise from sales of foreign currencies, currency gains or losses realized between trade and settlement dates on security transactions, and the difference between the amount of dividends and foreign withholding taxes recorded on the books and the U.S. dollar equivalent of the amounts actually received or paid. Net unrealized appreciation (depreciation) on translation of assets and liabilities in foreign currencies arise from changes in the exchange rate relating to assets and liabilities, other than investments in securities, purchased and held in non-U.S. denominated currencies. 6. Futures Contracts The Acquiring Funds may enter into futures contracts for both hedging and non-hedging purposes. Initial margin deposits are made by cash deposits or segregation of specific securities as may be required by the exchange on which the transaction was conducted. Pursuant to the contracts, a fund agrees to receive from or pay to the broker, an amount of cash equal to the daily fluctuation in the value of the contract. Such receipts or payments are known as "variation margin" and are recorded by the fund as a variation margin receivable or payable on futures contracts. During the period the futures contracts are open, daily changes in the value of the contracts are recognized as unrealized gains or losses. These unrealized gains or losses are included as a component of net unrealized appreciation (depreciation) of investments on the statements of assets and liabilities. When the contracts are closed, the fund recognizes a realized gain or loss equal to the difference between the proceeds from, or cost of, the closing transaction and the fund's cost basis in the contract. Pro Forma Notes to Financial Statements (continued) April 30, 2006 (unaudited) 7. Repurchase Agreements The Acquiring Funds may invest in repurchase agreements that are fully collateralized, typically by U.S. government or U.S. government agency securities. When repurchase agreement investments are made as part of the Funds' securities lending program, the collateral is in the possession of the Funds' lending agent or a third party agent. The collateral is evaluated daily by the lending agent to ensure the value is maintained, at a minimum, in an amount equal to the principal amount plus accrued interest of each repurchase agreement. In the event of default on the obligation to repurchase, the Funds have the right to liquidate the collateral and apply the proceeds in satisfaction of the obligation. In the event the seller of a repurchase agreement defaults, the Funds could experience delays in the realization of the collateral. 8. Securities Lending The Acquiring Funds may lend portfolio securities to approved brokerage firms to earn additional income. Each applicable fund receives collateral (in the form of U.S. government securities, U.S. government agency securities, letters of credit, and/or cash) against the loaned securities and maintains collateral in an amount not less than 100% of the market value of the loaned securities during the period of the loan. Cash collateral is usually invested in short-term securities. The market value of loaned securities is determined at the close of business of the Funds and any additional required collateral is delivered to the fund on the next business day. Although risk is mitigated by the collateral, the fund could experience a delay in recovering its securities and possible loss of income or value if the borrower fails to return them. 9. Capital Shares The pro forma net asset value per share assumes issuance of shares of the Acquiring Funds that would have been issued at April 30, 2006, in connection with the Reorganization. The number of shares assumed to be issued is equal to the net assets of the Acquired Funds, as of April 30, 2006, divided by the net asset value per share of the Acquiring Funds as of April 30, 2006. The pro forma number of shares outstanding, by class, for the combined fund can be found on the statements of assets and liabilities. 10. Pro Forma Adjustments The accompanying pro forma financial statements reflect changes in fund shares as if the Reorganization had taken place on April 30, 2006. The expenses of the Acquired Funds were adjusted assuming the fee structure of the Acquiring Funds was in effect for the twelve months ended April 30, 2006. 11. Distributions No provision for federal income taxes is considered necessary because each fund is qualified as a "regulated investment company" under the Internal Revenue Code and intends to distribute each year substantially all of its net investment income and realized capital gains to shareholders. The Acquired Funds will distribute substantially all of their net investment income and any realized gains prior to the reorganization date. PART C OTHER INFORMATION Item 15. Indemnification Under Section 2-418 of the Maryland General Corporation Law, with respect to any proceedings against a present or former director, officer, agent or employee (a "corporate representative") of the Registrant, the Registrant may indemnify the corporate representative against judgments, fines, penalties, and amounts paid in settlement, and against expenses, including attorneys' fees, if such expenses were actually incurred by the corporate representative in connection with the proceeding, unless it is established that: (i) The act or omission of the corporate representative was material to the matter giving rise to the proceeding; and 1. Was committed in bad faith; or 2. Was the result of active and deliberate dishonesty; or (ii) The corporate representative actually received an improper personal benefit in money, property, or services; or (iii) In the case of any criminal proceeding, the corporate representative had reasonable cause to believe that the act or omission was unlawful. If a proceeding is brought by or on behalf of the Registrant, however, the Registrant may not indemnify a corporate representative who has been adjudged to be liable to the Registrant. Under the Registrant's Articles of Incorporation and Bylaws, directors and officers of the Registrant are entitled to indemnification by the Registrant to the fullest extent permitted under Maryland law and the Investment Company Act of 1940. Reference is made to Article VI, Section 7 of the Registrant's Articles of Incorporation, Article 12 of the Registrant's Bylaws and Section 2-418 of the Maryland General Corporation Law. The Registrant has agreed to indemnify, defend and hold the Distributor, its officers and directors, and any person who controls the Distributor within the meaning of Section 15 of the Securities Act of 1933, free and harmless from and against any and all claims, demands, liabilities and expenses (including the cost of investigating or defending such claims, demands or liabilities and any counsel fees incurred in connection therewith) which the Distributor, its officers, directors or any such controlling person may incur under the Securities Act of 1933, or under common law or otherwise, arising out of or based upon any untrue statement of a material fact contained in the Registrant's registration statement or prospectus or arising out of or based upon any alleged omission to state a material fact required to be stated in either thereof or necessary to make the statements in either thereof not misleading, except insofar as such claims, demands, liabilities or expenses arise out of or are based upon any such untrue statement or omission made in conformity with information furnished in writing by the Distributor to the Registrant for use in the Registrant's registration statement or prospectus: provided, however, that this indemnity agreement, to the extent that it might require indemnity of any person who is also an officer or director of the Registrant or who controls the Registrant within the meaning of Section 15 of the Securities Act of 1933, shall not inure to the benefit of such officer, director or controlling person unless a court of competent jurisdiction shall determine, or it shall have been determined by controlling precedent that such result would not be against public policy as expressed in the Securities Act of 1933, and further provided, that in no event shall anything contained herein be so construed as to protect the Distributor against any liability to the Registrant or to its security holders to which the Distributor would otherwise be subject by reason of willful misfeasance, bad faith, or gross negligence, in the performance of its duties, or by reason of its reckless disregard of its obligations under this Agreement. The Registrant's agreement to indemnify the Distributor, its officers and directors and any such controlling person as aforesaid is expressly conditioned upon the Registrant being promptly notified of any action brought against the Distributor, its officers or directors, or any such controlling person, such notification to be given by letter or telegram addressed to the Registrant. Item 16. Exhibits. Unless otherwise stated, all filing references are to File No. 33-59474 1 (1) a. Articles of Amendment and Restatement (filed 4/12/96) b. Articles of Amendment and Restatement (filed 9/22/00) c. Articles of Amendment and Restatement dated 6/14/02 (filed 12/30/02) d. Articles of Amendment and dated 5/23/05 (filed 9/8/05) e. Articles of Amendment and dated 9/30/05 (filed 11/22/05) (2) a. Articles of Amendment (filed 9/12/97) b. Articles of Amendment dated 7/7/06 (filed 9/20/06 as an exhibit to Form N-14, file no. 333-137477) (3) a. Certificate of Correction dated 9/14/00 (filed 9/22/00) b. Certificate of Correction dated 12/13/00 (filed 10/12/01) (4) a. Articles Supplementary dated 12/11/00 (filed 10/12/01) b. Articles Supplementary dated 3/12/01 (filed 10/12/01) c. Articles Supplementary dated 4/16/02 (filed 12/30/02) d. Articles Supplementary dated 9/25/02 (filed 12/30/02) e. Articles Supplementary dated 2/5/03 (filed 02/26/03) f. Articles Supplementary dated 4/30/03 (filed 9/11/03) g. Articles Supplementary dated 6/10/03 (filed 9/11/03) h. Articles Supplementary dated 9/9/03 (filed 9/11/03) i. Articles Supplementary dated 11/6/03 (filed 12/15/03) j. Articles Supplementary dated 1/29/04 (filed 2/26/04) k. Articles Supplementary dated 3/8/04 (filed 7/27/04) l. Articles Supplementary dated 6/14/04 (filed 9/27/04) m. Articles Supplementary dated 9/13/04 (filed 12/13/04) n. Articles Supplementary dated 10/1/04 (filed 12/13/04) o. Articles Supplementary dated 12/13/04 (filed 2/28/05) p. Articles Supplementary dated 2/4/05 (filed 5/16/05) q. Articles Supplementary dated 2/24/05 (filed 5/16/05) r. Articles Supplementary dated 5/6/05 (filed 9/8/05) s. Articles Supplementary dated 12/20/05 (filed 2/28/06) t. Articles Supplementary dated 9/19/06 (filed 9/20/06 as an exhibit to Form N-14, file no. 333-137477) 2 By-laws (filed 9/11/03) 3 Not Applicable 4 Forms of Plans of Reorganization (filed herewith as Appendix A to the Proxy Statement/Prospectus). 5 Included in Exhibits 1 and 2 hereto. 6 (1) a. Management Agreement (filed 9/12/97) b. 1st Amendment to the Management Agreement (filed 9/22/00) c. Management Agreement (filed 12/5/00) d. Amendment to Management Agreement dated 9/9/02 (filed 12/30/02) e. Amendment to Management Agreement dated 3/11/02 (filed 02/26/03) f. Amendment to Management Agreement dated 12/10/02 (filed 02/26/03) g. Amendment to Management Agreement dated 10/22/03 (filed 12/15/03) h. Amendment to Management Agreement dated 3/8/04 (filed 6/1/04) i. Amendment to Management Agreement dated 6/14/04 (filed 9/27/04) j. Amendment to Management Agreement dated 7/29/04 (filed 9/27/04) k. Amendment to Management Agreement dated 9/13/04 (filed 9/27/04) l. Amendment to Management Agreement dated 12/13/04 (filed 2/28/05) m. Amendment to Management Agreement dated 1/1/05 (filed 2/28/05) n. Amendment to Management Agreement dated 9/30/05 (11/22/05) o. Form of Amendment to Management Agreement (filed 9/20/06 as an exhibit to Form N-14, file no. 333-137477) (2) a. Invista Sub-Advisory Agreement (filed 9/12/97) b. 1st Amendment to the Invista Sub-Advisory Agreement (filed 2/25/02) c. 2nd Amendment to the Invista Sub-Advisory Agreement (filed 2/25/02) (3) a. American Century Sub-Advisory Agreement (filed 12/5/00) b. Amended &Restated Sub-Advisory Agreement with Amer. Century (filed 9/11/03) c. Amended &Restated Sub-Advisory Agreement with Amer. Century (filed 9/27/04) d. Amended & Restated Sub-Adv Agreement with Amer. Century dated 6/13/05 (filed 9/8/05) (4) a. Bernstein Sub-Advisory Agreement (filed 12/5/00) b. Amendment to Bernstein Sub-Advisory Agreement dated 3/28/03 (filed 9/11/03) c. Amended &Restated Bernstein Sub-Advisory Agreement dated 7/1/04 (filed 9/27/04) (5) a. BT Sub-Advisory Agreement (filed 9/22/00) (6) a. Federated Sub-Advisory Agreement (filed 12/5/00) b. Federated Amended &Restated Sub-Advisory Agreement dated 10/31/03 (filed 12/15/03) (7) a. Neuberger Berman Sub-Advisory Agreement (filed 12/5/00) b. Amended &Restated Sub-Advisory Agreement with Neuberger Berman (filed 9/11/03) c. Amended &Restated Sub-Advisory Agreement with Neuberger Berman dated 10/31/03 (filed 12/15/03) d. Amended &Restated Sub-Advisory Agreement with Neuberger Berman dated 7/1/04 (filed 2/28/05) (8) a. Morgan Stanley Sub-Advisory Agreement-PLCGI (filed 12/5/00) b. Amended &Restated Sub-Advisory Agreement with MSAM dated 11/25/03 (filed 7/27/04) c. Amended &Restated Sub-Advisory Agreement with MSAM dated 6/30/04 (filed 2/28/05) (9) a. Principal Capital Income Investors Sub-Advisory Agreement (filed 2/27/01) b. 1st Amendment to the PCII Sub-Advisory Agreement (filed 10/12/01) c. 2nd Amendment to the PCII Sub-Advisory Agreement (filed 10/12/01) d. 3rd Amendment to the PCII Sub-Advisory Agreement (filed 10/12/01) (10) a. Principal Capital Real Estate Investors Sub-Advisory Agreement (filed 2/27/01) b. 1st Amendment to the PCREI Sub-Advisory Agreement (filed 10/12/01) c. 2nd Amendment to the PCREI Sub-Advisory Agreement (filed 10/12/01) d. Amended &Restated Sub-Advisory Agreement with PCREI (filed 9/11/03) e. Amended & Restated Sub-Adv Agreement with PREI dated 9/12/05 (filed 12/29/05) f. Amended & Restated Sub-Adv Agreement with PREI dated 1/1/06 (Filed 2/28/06) (11) a. Turner Sub-Advisory Agreement (filed 12/5/00) (12) a. PCII Cash Management Sub-Advisory Agreement (filed 2/27/01) b. Amendment to PCII Cash Management Sub-Advisory Agreement (filed 12/30/02) c. Amended &Restated Cash Management Sub-Advisory Agreement dated 10/23/03 (filed 12/15/03) (13) a. Ark Asset Management Sub-Advisory Agreement (filed 2/27/01) b. Amended &Restated Sub-Advisory Agreement with Ark (filed 9/11/03) (14) a. Morgan Stanley Sub-Advisory Agreement - PMCB (filed 2/27/01) b. Amended &Restated Sub-Advisory Agreement with MSAM dated 11/25/03 (filed 7/27/04) (15) a. Spectrum Sub-Advisory Agreement (filed 04/29/02) b. Amended &Restated Sub-Advisory Agreement with Spectrum (filed 9/11/03) (16) a. UBS Global Asset Management Sub-Advisory Agreement (filed 04/29/02) b. Amended &Restated Sub-Advisory Agreement with UBS (filed 9/11/03) c. Amended &Restated Sub-Advisory Agreement with UBS dated 4/1/04 filed 6/1/04) (17) a. Dreyfus Sub-Advisory Agreement(filed 12/30/02) b. Amended Dreyfus Sub-Advisory Agreement dated 11/25/03 (filed 12/15/03) c. Amended Dreyfus Sub-Advisory Agreement dated 6/30/04 (filed 2/28/05) (18) a. JP Morgan Sub-Advisory Agreement (filed 12/30/02) b. Amended &Restated Sub-Advisory Agreement with JP Morgan (filed 9/11/03) (19) a. Principal Global Investors Sub-Advisory Agreement (filed 12/30/02) b. Amended and Restated PGI Sub-Advisory Agreement (filed 02/26/03) c. Amended &Restated Sub-Advisory Agreement with PGI (filed 9/11/03) d. Amended &Restated Sub-Advisory Agreement with PGI (filed 6/1/04) e. Amended &Restated Sub-Advisory Agreement with PGI dated 7-04 (filed 9/27/04) f. Amended &Restated Sub-Advisory Agreement with PGI dated 9-13-04 (filed 12/13/04) g. Amended &Restated Sub-Advisory Agreement with PGI dated 12-13-05 (filed 2/28/06) h. Amended &Restated Sub-Advisory Agreement with PGI dated 7-1-05 (filed 9/8/05) i. Sub-Sub-Advisory Agreement with Spectrum dated 7-1-2005 (filed 12/29/05) j. Sub-Sub-Advisory Agreement with Post dated 7-1-2005 (filed 12/29/05) k. Amended &Restated Sub-Adv Agreement with PGI dated 3-1-06 (filed 2/28/06) (20) a. Putnam Sub-Advisory Agreement(filed 12/30/02) b. Amended &Restated Sub-Advisory Agreement with Putnam (filed 9/11/03) (21) a. Goldman Sachs Sub-Advisory Agreement(filed 12/30/02) b. Amended &Restated Sub-Advisory Agreement with Goldman Sachs (filed 9/11/03) c. Amended &Restated Goldman Sachs Sub-Advisory Agreement dated 11/20/03 (filed 12/15/03) d. Amended &Restated Goldman Sachs Sub-Advisory Agreement dated 6/30/04 (filed 2/28/05) (22) a. Wellington Sub-Advisory Agreement (filed 12/30/02) b. Amended &Restated Sub-Advisory Agreement with Wellington (filed 9/11/03) (23) a. Fidelity Sub-Advisory Agreement (filed 2/26/04) b. Fidelity Sub-Sub-Advisory Agreement (filed 12/15/03) c. Amended &Restated Fidelity Sub-Advisory Agreement dated 12/29/04 (filed on 2/28/05) (24) a. T. Rowe Price Sub-Advisory Agreement (filed 6/1/04) b. Amended &Restated Sub-Advisory Agreement with T. Rowe Price (filed 9/27/04) c. Amended & Restated Sub-Adv Agreement with T. Rowe Price dated 8/1/05 (filed 12/29/05) (25) a. Grantham, Mayo, Van Otterloo Sub-Advisory Agreement (filed 6/1/04) (26) a. Mazama Capital Management Sub-Advisory Agreement (filed 6/1/04) (27) a. Dimensional Fund Advisors Sub-Advisory Agreement (filed 6/1/04) (28) a. Emerald Advisors, Inc. Sub-Advisory Agreement (filed 9/27/04) (29) a. Los Angeles Capital Management Sub-Advisory Agreement (filed 9/27/04) b. Amended & Restated Sub-Adv Agreement with LA Capital dated 9/12/05 (filed 11/22/05) (30) a. Post Advisory Group Sub-Advisory Agreement dated 12/29/04 (filed 2/28/05) b. Amended & Restated Sub-Adv Agreement with Post dated 9/12/05 (filed 12/29/05) (31) a. Mellon Equity Associates LLP Sub-Advisory Agreement dated 12/21/04 (filed 2/28/05) b. Amended & Restated Sub-Adv Agreement with Mellon Equity dated 8/8/05 (filed 11/22/05) (32) a. Columbus Circle Investors Sub-Advisory Agreement dated 1/5/05 (filed 9/8/05) (33) a. Barrow Hanley Sub-Advisory Agreement dated 7/12/05 (filed 9/8/05) (34) a. Vaughan Nelson Investment Management Sub-Advisory Agreement dated 9/21/05 (filed 11/22/05) (35) a. Nuveen Sub-Advisory Agreement dated 3/1/06 (filed 2/28/06) (36) a. Bank of New York Sub-Advisory Agreement dated 3/1/06 (filed 2/28/06) (37) a. Form of WM Advisors, Inc. Sub-Advisory Agreement (filed 9/20/06 as an exhibit to Form N-14, file no. 333-137477) (38) a. Form of Van Kampen Sub-Advisory Agreement (filed 9/20/06 as an exhibit to Form N-14, file no. 333-137477) 7 (1) a. Distribution Agreement (filed 4/12/96) b. 1st Amendment to the Distribution Agreement (filed 9/22/00) c. Distribution Agreement (filed 9/22/00) d. Distribution Plan and Agreement (Select Class)(filed 12/30/02) e. Amended and Restated Distribution Plan and Agreement (Select Class)(filed 12/30/02) f. Amended and Restated Distribution Plan and Agreement (Advisors Select Class)(filed 12/30/02) g. Amended and Restated Distribution Plan and Agreement (Advisors Preferred Class)(filed 12/30/02) h. Amended and Restated Distribution Plan and Agreement (Class J)(filed 12/30/02) i. Amended and Restated Distribution Agreement (filed 12/30/02) j. Amendment to Distribution Plan and Agreement (Advisors Preferred Class) (filed 02/26/03) k. Amendment to Distribution Plan and Agreement (Advisors Select Class) (filed 02/26/03) l. Amendment to Distribution Plan and Agreement (Select Class) (filed 02/26/03) m. Amendment to Distribution Agreement dated 03/02 (filed 02/26/03) n. Amendment to Distribution Agreement dated 12/02 (filed 02/26/03) o. Amended &Restated Distribution Agreement dated 10/22/03 (filed 12/15/03) p. Amended &Restated Distribution Agreement dated 6/14/04 (filed 9/27/04) q. Amended & Restated Distribution Agreement dated 2/24/05 (filed 9/8/05) (2) a. Selling Agreement--Advantage Classes (filed 9/11/03) b. Selling Agreement--J Shares (filed 9/11/03) c. Selling Agreement--Class A and Class B Shares (filed 9/8/05) 8 Not Applicable 9 (1) a. Domestic Portfolio Custodian Agreement with Bank of New York (filed 4/12/96) b. Domestic Funds Custodian Agreement with Bank of New York (filed 12/5/00) c. Domestic and Global Custodian Agreement with Bank of New York (filed 11/22/05) (2) a. Global Portfolio Custodian Agreement with Chase Manhattan Bank (filed 4/12/96) b. Global Funds Custodian Agreement with Chase Manhattan Bank (filed 12/5/00) 10 Rule 12b-1 Plan (1) Advisors Preferred Plan (filed 9/22/2000) a. Amended &Restated dated 9/9/02 (filed 12/30/02) b. Amended &Restated dated 3/11/04 (filed 3/14/04) c. Amended &Restated dated 6/14/04 (filed 9/27/04) d. Amended &Restated dated 9/13/04 (filed 9/27/04) e. Amended &Restated dated 12/13/04 (filed 2/28/05) f. Amended & Restated dated 9/30/05 (filed 11/22/05) (2) Advisors Select Plan (filed 9/22/2000) a. Amended &Restated dated 9/9/02 (filed 12/30/02) b. Amended &Restated dated 3/11/04 (filed 3/14/04) c. Amended &Restated dated 6/14/04 (filed 9/27/04) d. Amended &Restated dated 9/13/04 (filed 9/27/04) e. Amended &Restated dated 12/13/04 (filed 2/28/05) f. Amended & Restated dated 9/30/05 (filed 11/22/05) (3) Select Plan (filed 12/30/02) a. Amended &Restated dated 9/9/02 (filed 12/30/02) b. Amended &Restated dated 3/11/04 (filed 3/14/04) c. Amended &Restated dated 6/14/04 (filed 9/27/04) d. Amended &Restated dated 9/13/04 (filed 9/27/04) e. Amended &Restated dated 12/13/04 (filed 2/28/05) f. Amended & Restated dated 9/30/05 (filed 11/22/05) (4) Class J Plan (filed 12/30/02) a. Amended &Restated dated 9/9/02 (filed 12/30/02) b. Amended &Restated dated 9/13/04 (filed 9/27/04) c. Amended &Restated dated 12/13/04 (filed 2/28/05) d. Amended & Restated dated 9/30/05 (filed 11/22/05) (5) Advisors Signature Plan (filed 12/13/04) a. Amended &Restated dated 9/13/04 (filed 9/27/04) b. Amended &Restated dated 12/13/04 (filed 2/28/05) c. Amended & Restated dated 9/30/05 (filed 11/22/05) (6) Class A Plan (filed 2/28/05) a. Amended & Restated dated 9/30/05 (filed 11/22/05) b. Amended & Restated dated 9/11/06 (filed 9/20/06 as an exhibit to Form N-14, file no. 333-137477) (7) Class B Plan (filed 2/28/05) a. Amended & Restated dated 9/30/05 (filed 11/22/05) b. Amended & Restated dated 9/11/06 (filed 9/20/06 as an exhibit to Form N-14, file no. 333-137477) (8) Class C Plan (filed 2/28/05) a. Dated 9/11/06 (filed 9/20/06 as an exhibit to Form N-14, file no. 333-137477) (n) Rule 18f-3 Plan (filed 2/28/05) 11 Opinion and Consent of counsel, regarding legality of issuance of shares and other matters * 12 Forms of Opinions and Consent of counsel on tax matters- To be filed by amendment 13 Not Applicable 14 Consent of Independent Registered Public Accountants (a) Consent of Ernst & Young LLP * 15 Not Applicable 16(a) Powers of Attorney * 17 (a) Prospectuses of Principal Investors Fund dated March 1, 2006 (filed 3/20/06) (b) Statement of Additional Information of Principal Investors Fund dated March 1, 2006 (filed 3/20/06) (c) Statement of Additional Information of Principal Investors Fund dated October __, 2006 (filed 9/20/06) (d) Annual Report of Principal Investors Fund, Inc. for the fiscal year ended October 31, 2005 (filed 12/21/05) (e) Semi-Annual Report of Principal Investors Fund, Inc. for the period ended April 30, 2006 (filed 6/28/06) <FN> * Filed Herewith. </FN> Item 17. Undertakings (1) The undersigned Registrant agrees that prior to any public reoffering of the securities registered through the use of a prospectus which is a part of this Registration Statement by any person or party who is deemed to be an underwriter within the meaning of Rule 145(c) of the Securities Act of 1933, the reoffering prospectus will contain the information called for by the applicable registration form for re-offerings by persons who may be deemed underwriters, in addition to the information called for by the other items of the applicable form. (2) The undersigned Registrant agrees that every prospectus that is filed under paragraph (1) above will be filed as part of an amendment to the Registration Statement and will not be used until the amendment is effective, and that, in determining any liability under the Securities Act of 1933, each post-effective amendment shall be deemed to be a new registration statement for the securities offered therein, and the offering of the securities at that time shall be deemed to be the initial bona fide offering of them. (3) The undersigned Registrant agrees to file a post-effective amendment to this Registration Statement which will include an opinion of counsel regarding the tax consequences of the proposed reorganization. SIGNATURES Pursuant to the requirements of the Securities Act of 1933, the Registrant, Principal Investors Fund, Inc., has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Des Moines and State of Iowa, on the 21th day of September, 2006. Principal Investors Fund, Inc. (Registrant) By /s/ R. C. Eucher R. C. Eucher Director, President and Chief Executive Officer Attest: /s/ James F. Sager James F. Sager Assistant Secretary Pursuant to the requirement of the Securities Act of 1933, this Registration Statement has been signed below by the following persons in the capacities and on the date indicated. Signature Title Date /s/ R. C. Eucher Director, President and September 21,2006 R. C. Eucher Chief Executive Officer (Principal Executive Officer) (L. D. Zimpleman)* Director and Chairman September 21,2006 L. D. Zimpleman of the Board /s/ J. R. Brown Vice President and September 21, 2006 J. R. Brown Chief Financial Officer (Principal Accounting Officer) (E. A. Ballantine)* Director September 21, 2006 E. A. Ballantine (J. D. Davis)* Director September 21, 2006 J. D. Davis (R. W. Gilbert)* Director September 21 , 2006 R. W. Gilbert (M. A. Grimmett)* Director September 21, 2006 M. A. Grimmett (F.S. Hirseh) Director September 21, 2006 F.S. Hirseh (W. C. Kimball)* Director September 21, 2006 W. C. Kimball (B. A. Lukavsky)* Director September 21 , 2006 B. A. Lukavsky *By /s/ R. C. Eucher R. C. Eucher Director, President and Chief Executive Officer Pursuant to Powers of Attorney filed herewith. EXHIBIT INDEX Exhibit No. Description 4 Forms of Plans of Reorganization (filed herewith as Appendix A to the Proxy Statement/Prospectus) 11 Opinion and Consent of counsel regarding legality of issuance of shares and other matters 14(a) Consent of Ernst & Young LLP, Independent Registered Public Accountants 16(a) Powers of Attorney