UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-2594 - ------------------------------------------------------------------------------- MFS SERIES TRUST IV - ------------------------------------------------------------------------------- (Exact name of registrant as specified in charter) 500 Boylston Street, Boston, Massachusetts 02116 - ------------------------------------------------------------------------------- (Address of principal executive offices) (Zip code) Susan S. Newton Massachusetts Financial Services Company 500 Boylston Street Boston, Massachusetts 02116 - ------------------------------------------------------------------------------- (Name and address of agents for service) Registrant's telephone number, including area code: (617) 954-5000 - ------------------------------------------------------------------------------- Date of fiscal year end: August 31 - ------------------------------------------------------------------------------- Date of reporting period: February 28, 2007 - ------------------------------------------------------------------------------- ITEM 1. REPORTS TO STOCKHOLDERS. M F S(R) INVESTMENT MANAGEMENT [graphic omitted] SEMIANNUAL REPORT MFS(R) MONEY MARKET FUND MFS(R) GOVERNMENT MONEY MARKET FUND LETTER FROM THE CEO 1 - ---------------------------------------------------------- PORTFOLIO COMPOSITION 2 - ---------------------------------------------------------- EXPENSE TABLE 3 - ---------------------------------------------------------- PORTFOLIO OF INVESTMENTS 5 - ---------------------------------------------------------- STATEMENTS OF ASSETS AND LIABILITIES 9 - ---------------------------------------------------------- STATEMENTS OF OPERATIONS 11 - ---------------------------------------------------------- STATEMENTS OF CHANGES IN NET ASSETS 13 - ---------------------------------------------------------- FINANCIAL HIGHLIGHTS 15 - ---------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 17 - ---------------------------------------------------------- BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT 23 - ---------------------------------------------------------- PROXY VOTING POLICIES AND INFORMATION 23 - ---------------------------------------------------------- QUARTERLY PORTFOLIO DISCLOSURE 23 - ---------------------------------------------------------- CONTACT INFORMATION BACK COVER - ---------------------------------------------------------- THE REPORT IS PREPARED FOR THE GENERAL INFORMATION OF SHAREHOLDERS. IT IS AUTHORIZED FOR DISTRIBUTION TO PROSPECTIVE INVESTORS ONLY WHEN PRECEDED OR ACCOMPANIED BY A CURRENT PROSPECTUS. - ------------------------------------------------------------------------------ NOT FDIC INSURED o MAY LOSE VALUE o NO BANK OR CREDIT UNION GUARANTEE o NOT A DEPOSIT o NOT INSURED BY ANY FEDERAL GOVERNMENT AGENCY OR NCUA/NCUSIF - ------------------------------------------------------------------------------ 2/28/07 MCM-SEM LETTER FROM THE CEO [Photo of Robert J. Manning] Dear Shareholders: The past year has been a great example of why investors should keep their eyes on the long term. In 2006 the Dow Jones Industrial Average returned 19%. In February 2007 it hit its all-time high of 12,787. Less than a week later, stocks sold off around the globe. By March 5 the Dow was off 5.8%. That is a sign of volatile markets and a reason investors should make sure they have an investment plan that can ride out the peaks and troughs. If you are focused on a long-term investment strategy, the short-term ups and downs of the markets should not necessarily dictate portfolio action on your part. Both the bond and stock markets are inherently cyclical. In our view, investors who remain committed to a long-term plan are more likely to achieve their financial goals. We believe you should not let the headlines guide you in your investment decisions and that there is no sense in reacting to short- term volatility. In any market environment, we believe individual investors are best served by following a three-pronged investment strategy of allocating their holdings across the major asset classes, diversifying within each class, and regularly rebalancing their portfolios to maintain their desired allocations. Of course, these strategies cannot guarantee a profit or protect against a loss. Investing and planning for the long term require diligence and patience, two traits that in our experience are essential to capitalizing on the many opportunities the financial markets can offer -- through both up and down economic cycles. Respectfully, /s/ Robert J. Manning Robert J. Manning Chief Executive Officer and Chief Investment Officer MFS Investment Management(R) April 16, 2007 The opinions expressed in this letter are subject to change, may not be relied upon for investment advice, and no forecasts can be guaranteed. PORTFOLIO COMPOSITION MFS(R) MONEY MARKET FUND PORTFOLIO STRUCTURE (u) Commercial Paper 91.1% Certificates of Deposit 8.6% Other Assets Less Liabilities 0.3% SHORT TERM CREDIT QUALITY (q) Average Credit Quality Short Term Bonds (a) A-1 ------------------------------------------------ All holdings are rated "A-1" MATURITY BREAKDOWN (u) 0 - 29 days 61.7% ------------------------------------------------ 30 - 59 days 13.1% ------------------------------------------------ 60 - 89 days 6.2% ------------------------------------------------ 90 - 366 days 18.7% ------------------------------------------------ Other Assets Less Liabilities 0.3% ------------------------------------------------ MFS(R) GOVERNMENT MONEY MARKET FUND PORTFOLIO STRUCTURE (u) U.S. Government Agency Obligations 97.5% Repurchase Agreements 2.5% SHORT TERM CREDIT QUALITY (q) Average Credit Quality Short Term Bonds (a) A-1 ------------------------------------------------ All holdings are rated "A-1" MATURITY BREAKDOWN (u) 0 - 29 days 57.1% ------------------------------------------------ 30 - 59 days 28.5% ------------------------------------------------ 60 - 89 days 4.1% ------------------------------------------------ 90 - 366 days 10.3% ------------------------------------------------ (a) The average credit quality is based upon a market weighted average of portfolio holdings that are rated by public rating agencies. (q) Each security is assigned a rating from Moody's Investors Service. If not rated by Moody's, the rating will be that assigned by Standard & Poor's. Likewise, if not assigned a rating by Standard & Poor's, it will be based on the rating assigned by Fitch, Inc. If not rated by any of the three agencies, the security is considered Not Rated. U.S. Treasuries and U.S. Agency securities are included in the "A-1"-rating category. Percentages are based on the total market value of investments as of 2/28/07. (u) For purposes of this presentation, accrued interest, where applicable, is included. Percentages are based on net assets as of 2/28/07, unless otherwise noted. The portfolio is actively managed and current holdings may be different. EXPENSE TABLES Fund expenses borne by the shareholders during the period, September 1, 2006 through February 28, 2007 As a shareholder of the funds, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments and redemption fees on certain exchanges and redemptions, and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the funds and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period, September 1, 2006 through February 28, 2007. ACTUAL EXPENSES The first line of the following tables provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES The second line of the following tables provide information about hypothetical account values and hypothetical expenses based on each fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the funds and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the tables are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption fees. Therefore, the second line of the tables is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher. - ------------------------------------------------------------------------------ Beginning Expenses Annualized Account Ending Paid During MFS MONEY Expense Value Account Value Period (p) MARKET FUND Ratio 9/01/06 2/28/07 9/01/06-2/28/07 - ------------------------------------------------------------------------------- Actual 0.34% $1,000.00 $1,025.30 $1.71 - ------------------------------------------------------------------------------- Hypothetical (h) 0.34% $1,000.00 $1,023.11 $1.71 - ------------------------------------------------------------------------------- - ------------------------------------------------------------------------------- Beginning Expenses Annualized Account Ending Paid During MFS GOVERNMENT Expense Value Account Value Period (p) MONEY MARKET FUND Ratio 9/01/06 2/28/07 9/01/06-2/28/07 - ------------------------------------------------------------------------------- Actual 0.69% $1,000.00 $1,023.30 $3.46 - ------------------------------------------------------------------------------- Hypothetical (h) 0.69% $1,000.00 $1,021.37 $3.46 - ------------------------------------------------------------------------------- (h) 5% fund return per year before expenses. (p) Expenses paid is equal to each class' annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by the number of days in the period, divided by the number of days in the year. Expenses paid do not include any applicable sales charges (loads) or redemption fees. If these transaction costs had been included, your costs would have been higher. PORTFOLIO OF INVESTMENTS 2/28/07 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. MFS(R) MONEY MARKET FUND Certificates of Deposit - 8.5% - ---------------------------------------------------------------------------------------------------- ISSUER SHARES/PAR VALUE ($) - ---------------------------------------------------------------------------------------------------- Other Banks & Diversified Financials - 8.5% - ---------------------------------------------------------------------------------------------------- Natexis Banques Populaires, NY, 5.34%, due 8/13/07 $16,000,000 $ 16,000,000 Royal Bank of Canada, NY, 5.32%, due 6/21/07 40,250,000 40,250,000 UBS AG, Stamford CT Branch, 5.355%, due 3/06/07 37,768,000 37,768,000 - ---------------------------------------------------------------------------------------------------- TOTAL CERTIFICATES OF DEPOSIT, AT AMORTIZED COST $ 94,018,000 - ---------------------------------------------------------------------------------------------------- Commercial Paper - 91.1% (y) - ---------------------------------------------------------------------------------------------------- Asset Backed & Securitized - 3.6% - ---------------------------------------------------------------------------------------------------- Yorktown Capital LLC, 5.255%, due 3/07/07 (t) $40,184,000 $ 40,148,806 Yorktown Capital LLC, 5.25%, due 4/02/07 (t) 266,000 264,759 -------------- $ 40,413,565 - ---------------------------------------------------------------------------------------------------- Automotive - 0.5% - ---------------------------------------------------------------------------------------------------- Toyota Motor Credit Corp., 5.2%, due 7/27/07 $ 5,890,000 $ 5,764,085 - ---------------------------------------------------------------------------------------------------- Brokerage & Asset Managers - 0.3% - ---------------------------------------------------------------------------------------------------- Morgan Stanley, Inc., 5.22%, due 5/04/07 $ 3,383,000 $ 3,351,606 - ---------------------------------------------------------------------------------------------------- Electrical Equipment - 3.9% - ---------------------------------------------------------------------------------------------------- General Electric Co., 5.215%, due 6/29/07 $43,710,000 $ 42,950,175 - ---------------------------------------------------------------------------------------------------- Financial Institutions - 48.8% - ---------------------------------------------------------------------------------------------------- Barton Capital Corp., 5.33%, due 3/01/07 (t) $29,727,000 $ 29,727,000 Barton Capital Corp., 5.25%, due 3/08/07 (t) 14,292,000 14,277,410 CAFCO LLC, 5.25%, due 3/02/07 (t) 1,150,000 1,149,832 CRC Funding LLC, 5.25%, due 3/09/07 - 3/28/07 (t) 34,190,000 34,105,687 CRC Funding LLC, 5.27%, due 3/16/07 (t) 4,900,000 4,889,240 Ciesco LLC, 5.25%, due 3/05/07 - 3/09/07 (t) 34,722,000 34,687,832 Citibank Credit Card Issuance Trust, 5.25%, due 3/13/07 - 3/16/07 (t) 42,151,000 42,063,642 Fairway Finance Corp., 5.26%, due 3/15/07 (t) 20,295,000 20,253,485 Falcon Asset Securitization Co. LLC, 5.32%, due 3/01/07 (t) 43,134,000 43,134,000 Govco LLC, 5.24%, due 3/07/07 (t) 9,312,000 9,303,868 Govco LLC, 5.25%, due 3/26/07 - 4/10/07 (t) 30,914,000 30,735,668 Jupiter Securitization Corp., 5.26%, due 3/08/07 - 3/19/07 (t) 22,928,000 22,903,008 Kitty Hawk Funding Corp., 5.25%, due 3/30/07 (t) 17,140,000 17,067,512 Kitty Hawk Funding Corp., 5.24%, due 5/10/07 (t) 23,690,000 23,448,625 Old Line Funding LLC, 5.255%, due 3/06/07 (t) 13,275,000 13,265,311 Old Line Funding LLC, 5.25%, due 3/15/07 (t) 10,204,000 10,183,167 Old Line Funding LLC, 5.26%, due 3/19/07 (t) 795,000 792,909 Ranger Funding Co. LLC, 5.25%, due 3/01/07 - 3/12/07 (t) 42,180,000 42,142,758 Regency Markets No. 1 LLC, 5.25%, due 4/16/07 (t) 42,255,000 41,971,539 Scaldis Capital LLC, 5.26%, due 3/12/07 (t) 2,341,000 2,337,237 Scaldis Capital LLC, 5.25%, due 3/27/07 (t) 700,000 697,346 Sheffield Receivables Corp., 5.25%, due 4/20/07 - 4/23/07 (t) 15,905,000 15,784,651 Thunder Bay Funding LLC, 5.26%, due 3/09/07 (t) 42,299,000 42,249,557 Windmill Funding Corp., 5.25%, due 3/01/07 (t) 40,949,000 40,949,000 Windmill Funding Corp., 5.24%, due 5/04/07 (t) 1,000,000 990,684 -------------- $ 539,110,968 - ---------------------------------------------------------------------------------------------------- Insurance - 3.8% - ---------------------------------------------------------------------------------------------------- MetLife, Inc., 5.25%, due 3/05/07 - 4/12/07 (t) $42,438,000 $ 42,221,203 - ---------------------------------------------------------------------------------------------------- Major Banks - 14.0% - ---------------------------------------------------------------------------------------------------- Abbey National North America LLC, 5.32%, due 3/01/07 $29,017,000 $ 29,017,000 Barclays U.S. Funding Corp., 5.24%, due 3/26/07 4,425,000 4,408,898 Barclays U.S. Funding Corp., 5.21%, due 7/09/07 37,920,000 37,206,577 HBOS Treasury Services PLC, 5.245%, due 3/14/07 2,145,000 2,140,937 HBOS Treasury Services PLC, 5.25%, due 3/19/07 - 4/30/07 34,308,000 34,032,884 HBOS Treasury Services PLC, 5.24%, due 5/10/07 7,200,000 7,126,640 Societe Generale North America, 5.26%, due 3/12/07 5,800,000 5,790,678 Societe Generale North America, 5.23%, due 3/29/07 35,160,000 35,016,977 -------------- $ 154,740,591 - ---------------------------------------------------------------------------------------------------- Other Banks & Diversified Financials - 16.2% - ---------------------------------------------------------------------------------------------------- Citigroup Funding, Inc., 5.26%, due 3/20/07 $ 4,140,000 $ 4,128,507 Citigroup Funding, Inc., 5.25%, due 6/19/07 39,995,000 39,353,414 DEPFA Bank PLC, 5.25%, due 4/16/07 (t) 7,541,000 7,490,412 DEPFA Bank PLC, 5.24%, due 5/22/07 (t) 14,166,000 13,996,921 DEPFA Bank PLC, 5.22%, due 5/30/07 (t) 8,043,000 7,938,039 DEPFA Bank PLC, 4.98%, due 12/21/07 (t) 15,200,000 14,579,713 Deutsche Bank Financial LLC, 5.33%, due 3/01/07 44,005,000 44,005,000 ING America Insurance Holdings, Inc., 5.26%, due 3/14/07 42,000,000 41,920,225 Svenska Handelsbanken, Inc., 5.23%, due 4/04/07 946,000 941,327 UBS Finance Delaware LLC, 5.26%, due 3/07/07 2,000,000 1,998,247 UBS Finance Delaware LLC, 5.25%, due 4/20/07 - 5/30/07 765,000 755,630 UBS Finance Delaware LLC, 5.21%, due 7/05/07 1,633,000 1,603,222 -------------- $ 178,710,657 -------------- TOTAL COMMERCIAL PAPER, AT AMORTIZED COST AND VALUE $1,007,262,850 - ---------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS, AT AMORTIZED COST AND VALUE $1,101,280,850 - ---------------------------------------------------------------------------------------------------- Other Assets, Less Liabilities - 0.4% 4,152,689 - ---------------------------------------------------------------------------------------------------- NET ASSETS - 100.0% $1,105,433,539 - ---------------------------------------------------------------------------------------------------- SEE PORTFOLIO FOOTNOTES AND NOTES TO FINANCIAL STATEMENTS Portfolio of Investments (unaudited) - continued AT 2/28/07 MFS(R) GOVERNMENT MONEY MARKET FUND U.S. Government Agency Obligations - 97.5% (y) - ---------------------------------------------------------------------------------------------------- ISSUER SHARES/PAR VALUE ($) - ---------------------------------------------------------------------------------------------------- Fannie Mae, 5.17%, due 3/01/07 - 3/30/07 $ 2,258,000 $ 2,253,368 Fannie Mae, 5.06%, due 3/07/07 335,000 334,717 Fannie Mae, 5.165%, due 3/07/07 916,000 915,211 Fannie Mae, 5.15%, due 3/08/07 - 3/28/07 1,345,000 1,341,507 Fannie Mae, 5.175%, due 3/12/07 700,000 698,893 Fannie Mae, 5.16%, due 3/14/07 - 5/09/07 632,000 627,428 Fannie Mae, 5.135%, due 4/04/07 - 6/01/07 2,000,000 1,982,027 Fannie Mae, 5.143%, due 4/11/07 1,000,000 994,143 Fannie Mae, 5.18%, due 5/09/07 361,000 357,416 Farmer Mac, 5.14%, due 4/05/07 395,000 393,026 Farmer Mac, 5.141%, due 4/05/07 1,000,000 995,002 Federal Home Loan Bank, 5.155%, due 3/14/07 - 3/20/07 1,808,000 1,803,940 Federal Home Loan Bank, 5.18%, due 3/21/07 489,000 487,593 Freddie Mac, 5.165%, due 3/06/07 450,000 449,677 Freddie Mac, 5.15%, due 3/09/07 - 4/09/07 1,045,000 1,041,365 Freddie Mac, 5.163%, due 3/20/07 1,000,000 997,275 Freddie Mac, 5.17%, due 3/20/07 - 5/31/07 869,000 862,071 Freddie Mac, 5.145%, due 4/16/07 1,000,000 993,426 Freddie Mac, 5.11%, due 6/22/07 700,000 688,772 - ---------------------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS, AT AMORTIZED COST AND VALUE $ 18,216,857 - ---------------------------------------------------------------------------------------------------- Repurchase Agreements - 2.5% - ---------------------------------------------------------------------------------------------------- Merrill Lynch & Co., Inc., 5.32%, dated 2/28/07, due 3/01/07, total to be received $461,068 (secured by various U.S. Treasury and Federal Agency obligations and Mortgage Backed securities in a jointly traded account), at Cost $ 461,000 $ 461,000 - ---------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS, AT AMORTIZED COST AND VALUE $ 18,677,857 - ---------------------------------------------------------------------------------------------------- Other Assets, Less Liabilities - 0% 4,679 - ---------------------------------------------------------------------------------------------------- NET ASSETS - 100.0% $ 18,682,536 - ---------------------------------------------------------------------------------------------------- (t) Security exempt from registration with the U.S. Securities and Exchange Commission under Section 4(2) of the Securities Act of 1933. (y) The rate shown represents an annualized yield at time of purchase. SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENTS OF ASSETS AND LIABILITIES At 2/28/07 (unaudited) These statements represent your fund's balance sheet, which details the assets and liabilities comprising the total value of each fund. MFS MONEY MARKET FUND ASSETS - ------------------------------------------------------------------------------------------------------- Investments, at amortized cost and value $1,101,280,850 Cash 232 Receivable for fund shares sold 11,537,121 Interest receivable 1,074,324 Other assets 18,467 - ------------------------------------------------------------------------------------------------------- Total assets $1,113,910,994 - ------------------------------------------------------------------------------------------------------- LIABILITIES - ------------------------------------------------------------------------------------------------------- Distributions payable $161,441 Payable for fund shares reacquired 7,894,426 Payable to affiliates Management fee 9,018 Shareholder servicing costs 298,105 Administrative services fee 1,091 Payable for independent trustees' compensation 39,998 Accrued expenses and other liabilities 73,376 - ------------------------------------------------------------------------------------------------------- Total liabilities $8,477,455 - ------------------------------------------------------------------------------------------------------- Net assets $1,105,433,539 - ------------------------------------------------------------------------------------------------------- NET ASSETS CONSIST OF - ------------------------------------------------------------------------------------------------------- Paid-in-capital $1,105,433,485 Accumulated net realized gain (loss) on investments (8,515) Undistributed net investment income 8,569 - ------------------------------------------------------------------------------------------------------- Net assets $1,105,433,539 - ------------------------------------------------------------------------------------------------------- Shares of beneficial interest outstanding 1,105,433,537 - ------------------------------------------------------------------------------------------------------- Net asset value per share (net assets of $1,105,433,539/ 1,105,433,537 shares of beneficial interest outstanding) $1.00 - ------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Statements of Assets and Liabilities (unaudited) - continued AT 2/28/07 MFS GOVERNMENT MONEY MARKET FUND ASSETS - ------------------------------------------------------------------------------------------------------ Investments, at amortized cost and value $18,677,857 Cash 931 Receivable for fund shares sold 55,564 Interest receivable 68 Other assets 768 - ------------------------------------------------------------------------------------------------------ Total assets $18,735,188 - ------------------------------------------------------------------------------------------------------ LIABILITIES - ------------------------------------------------------------------------------------------------------ Distributions payable $815 Payable for fund shares reacquired 3,090 Payable to affiliates Management fee 153 Shareholder servicing costs 10,503 Administrative services fee 96 Payable for independent trustees' compensation 6,740 Accrued expenses and other liabilities 31,255 - ------------------------------------------------------------------------------------------------------ Total liabilities $52,652 - ------------------------------------------------------------------------------------------------------ Net assets $18,682,536 - ------------------------------------------------------------------------------------------------------ NET ASSETS CONSIST OF - ------------------------------------------------------------------------------------------------------ Paid-in-capital $18,690,209 Accumulated distributions in excess of net investment income (7,673) - ------------------------------------------------------------------------------------------------------ Net assets $18,682,536 - ------------------------------------------------------------------------------------------------------ Shares of beneficial interest outstanding 18,682,492 - ------------------------------------------------------------------------------------------------------ Net asset value per share (net assets of $18,682,536/18,682,492 shares of beneficial interest outstanding) $1.00 - ------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENTS OF OPERATIONS Six months ended 2/28/07 (unaudited) These statements describe how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. MFS MONEY MARKET FUND NET INVESTMENT INCOME - ------------------------------------------------------------------------------------------------------ Interest income $27,075,060 - ------------------------------------------------------------------------------------------------------ Expenses Management fee $2,263,868 Shareholder servicing costs 703,656 Administrative services fee 92,196 Independent trustees' compensation 12,914 Custodian fee 66,125 Shareholder communications 24,656 Auditing fees 12,890 Legal fees 12,679 Miscellaneous 39,185 - ------------------------------------------------------------------------------------------------------ Total expenses $3,228,169 - ------------------------------------------------------------------------------------------------------ Fees paid indirectly (43,209) Reduction of expenses by investment adviser (1,507,728) - ------------------------------------------------------------------------------------------------------ Net expenses $1,677,232 - ------------------------------------------------------------------------------------------------------ Net investment income $25,397,828 - ------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Statements of Operations (unaudited) - continued SIX MONTHS ENDED 2/28/07 MFS GOVERNMENT MONEY MARKET FUND NET INVESTMENT INCOME - ------------------------------------------------------------------------------------------------------ Interest income $523,134 - ------------------------------------------------------------------------------------------------------ Expenses Management fee $49,517 Shareholder servicing costs 14,933 Administrative services fee 8,679 Independent trustees' compensation 1,237 Custodian fee 5,880 Shareholder communications 831 Auditing fees 13,618 Legal fees 97 Registration fees 5,477 Miscellaneous 3,189 - ------------------------------------------------------------------------------------------------------ Total expenses $103,458 - ------------------------------------------------------------------------------------------------------ Fees paid indirectly (4,027) Reduction of expenses by investment adviser (34,715) - ------------------------------------------------------------------------------------------------------ Net expenses $64,716 - ------------------------------------------------------------------------------------------------------ Net investment income $458,418 - ------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENTS OF CHANGES IN NET ASSETS These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. MFS MONEY MARKET FUND SIX MONTHS ENDED YEAR ENDED 2/28/07 8/31/06 (UNAUDITED) CHANGE IN NET ASSETS FROM OPERATIONS - ------------------------------------------------------------------------------------------------------- Net investment income $25,397,828 $35,348,307 Net realized gain (loss) on investments -- (35) - ------------------------------------------------------------------------------------------------------- Change in net assets from operations $25,397,828 $35,348,272 - ------------------------------------------------------------------------------------------------------- DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------- From net investment income $(25,495,087) $(35,618,089) - ------------------------------------------------------------------------------------------------------- FUND SHARE (PRINCIPAL) TRANSACTIONS - ------------------------------------------------------------------------------------------------------- Net proceeds from sale of shares $605,769,977 $940,606,600 Net asset value of shares issued to shareholders in reinvestment of distributions 24,080,770 33,914,320 Cost of shares reacquired (466,004,932) (801,437,381) - ------------------------------------------------------------------------------------------------------- Change in net assets from fund share transactions $163,845,815 $173,083,539 - ------------------------------------------------------------------------------------------------------- Total change in net assets $163,748,556 $172,813,722 - ------------------------------------------------------------------------------------------------------- NET ASSETS - ------------------------------------------------------------------------------------------------------- At beginning of period 941,684,983 768,871,261 At end of period (including undistributed net investment income of $8,569 and $105,828, respectively) $1,105,433,539 $941,684,983 - ------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Statements of Changes in Net Assets - continued MFS GOVERNMENT MONEY MARKET FUND SIX MONTHS ENDED YEAR ENDED 2/28/07 8/31/06 (UNAUDITED) CHANGE IN NET ASSETS FROM OPERATIONS - ------------------------------------------------------------------------------------------------------- Net investment income $458,418 $852,761 - ------------------------------------------------------------------------------------------------------- DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------- From net investment income $(460,656) $(860,483) - ------------------------------------------------------------------------------------------------------- FUND SHARE (PRINCIPAL) TRANSACTIONS - ------------------------------------------------------------------------------------------------------- Net proceeds from sale of shares $3,774,209 $19,045,123 Net asset value of shares issued to shareholders in reinvestment of distributions 450,367 825,675 Cost of shares reacquired (7,596,765) (22,220,079) - ------------------------------------------------------------------------------------------------------- Change in net assets from fund share transactions $(3,372,189) $(2,349,281) - ------------------------------------------------------------------------------------------------------- Total change in net assets $(3,374,427) $(2,357,003) - ------------------------------------------------------------------------------------------------------- NET ASSETS - ------------------------------------------------------------------------------------------------------- At beginning of period 22,056,963 24,413,966 At end of period (including accumulated distributions in excess of net investment income of $7,673 and $5,435, respectively) $18,682,536 $22,056,963 - ------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Statements FINANCIAL HIGHLIGHTS The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years. The total returns in the table represent the rate by which an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period. MFS MONEY MARKET FUND SIX MONTHS YEARS ENDED 8/31 ENDED ------------------------------------------------------------------------ 2/28/07 2006 2005 2004 2003 2002 (UNAUDITED) Net asset value, beginning of period $1.00 $1.00 $1.00 $1.00 $1.00 $1.00 - ------------------------------------------------------------------------------------------------------------------------------ INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------------ Net investment income (d) $0.03 $0.04 $0.02 $0.01 $0.01 $0.02 Net realized gain (loss) on investments -- (0.00)(w) (0.00)(w) -- -- -- - ------------------------------------------------------------------------------------------------------------------------------ Total from investment operations $0.03 $0.04 $0.02 $0.01 $0.01 $0.02 - ------------------------------------------------------------------------------------------------------------------------------ LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------------------------ From net investment income $(0.03) $(0.04) $(0.02) $(0.01) $(0.01) $(0.02) - ------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $1.00 $1.00 $1.00 $1.00 $1.00 $1.00 - ------------------------------------------------------------------------------------------------------------------------------ Total return (%) (r) 2.53(n) 4.36 2.16 0.64 0.81 1.67 - ------------------------------------------------------------------------------------------------------------------------------ RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------------ Expenses before expense reductions (f) 0.64(a) 0.68 0.75 0.67 0.60 0.68 Expenses after expense reductions (f) 0.34(a) 0.37 0.44 0.54 N/A N/A Net investment income 5.02(a) 4.28 2.17 0.62 0.80 1.66 Net assets at end of period (000 Omitted) $1,105,434 $941,685 $768,871 $828,921 $2,123,459 $1,962,159 - ------------------------------------------------------------------------------------------------------------------------------ (a) Annualized. (d) Per share data are based on average shares outstanding. (f) Ratios do not reflect reductions from fees paid indirectly. (n) Not annualized. (r) Certain expenses have been reduced without which performance would have been lower. (w) Per share amount was less than $0.01. SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years. The total returns in the table represent the rate by which an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period. MFS GOVERNMENT MONEY MARKET FUND Six months Years ended 8/31 ended ----------------------------------------------------------------- 2/28/07 2006 2005 2004 2003 2002 (unaudited) Net asset value, beginning of period $1.00 $1.00 $1.00 $1.00 $1.00 $1.00 - ------------------------------------------------------------------------------------------------------------------------------ INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------------ Net investment income (d) $0.02 $0.04 $0.02 $0.01 $0.01 $0.01 - ------------------------------------------------------------------------------------------------------------------------------ LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------------------------ From net investment income $(0.02) $(0.04) $(0.02) $(0.01) $(0.01) $(0.01) - ------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $1.00 $1.00 $1.00 $1.00 $1.00 $1.00 - ------------------------------------------------------------------------------------------------------------------------------ Total return (%) (r) 2.33(n) 3.89 2.02 0.54 0.66 1.51 - ------------------------------------------------------------------------------------------------------------------------------ RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------------ Expenses before expense reductions (f) 1.04(a) 1.10 0.87 0.74 0.72 0.82 Expenses after expense reductions (f) 0.69(a) 0.75 0.52 0.59 N/A N/A Net investment income 4.63(a) 3.78 1.96 0.49 0.61 1.56 Net assets at end of period (000 Omitted) $18,683 $22,057 $24,414 $39,787 $132,888 $54,741 - ------------------------------------------------------------------------------------------------------------------------------ (a) Annualized. (d) Per share data are based on average shares outstanding. (f) Ratios do not reflect reductions from fees paid indirectly. (n) Not annualized. (r) Certain expenses have been reduced without which performance would have been lower. SEE NOTES TO FINANCIAL STATEMENTS NOTES TO FINANCIAL STATEMENTS (unaudited) (1) BUSINESS AND ORGANIZATION MFS Money Market Fund and MFS Government Money Market Fund (the funds) are each a series of MFS Series Trust IV (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company. (2) SIGNIFICANT ACCOUNTING POLICIES GENERAL - 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. INVESTMENT VALUATIONS - Money market instruments are valued at amortized cost, which approximates market value. Amortized cost involves valuing an instrument at its cost as adjusted for amortization of premium or accretion of discount rather than its current market value. Each money market fund's use of amortized cost is subject to the fund's compliance with Rule 2a-7 under the Investment Company Act of 1940. The amortized cost value of an instrument can be different from the market value of an instrument. In September 2006, FASB Statement No. 157, Fair Value Measurements (the "Statement") was issued, and is effective for fiscal years beginning after November 15, 2007 and for all interim periods within those fiscal years. This Statement provides a single definition of fair value, a hierarchy for measuring fair value and expanded disclosures about fair value measurements. Management is evaluating the application of the Statement to the fund, and believes the impact will be limited to expanded disclosures resulting from the adoption of this Statement in the fund's financial statements. REPURCHASE AGREEMENTS - Each fund may enter into repurchase agreements with institutions that the fund's investment adviser has determined are creditworthy. Each repurchase agreement is recorded at cost. Each fund requires that the securities collateral in a repurchase transaction be transferred to the custodian in a manner sufficient to enable the fund to obtain those securities in the event of a default under the repurchase agreement. The funds monitor, on a daily basis, the value of the collateral to ensure that its value, including accrued interest, is greater than amounts owed to the funds under each such repurchase agreement. The funds and other funds managed by Massachusetts Financial Services Company (MFS), may utilize a joint trading account for the purpose of entering into one or more repurchase agreements. INDEMNIFICATIONS - Under each fund's organizational documents, its officers and trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the funds. Additionally, in the normal course of business, each fund enters into agreements with service providers that may contain indemnification clauses. Each fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the funds that have not yet occurred. INVESTMENT TRANSACTIONS AND INCOME - Investment transactions are recorded on the trade date. Interest income is recorded on the accrual basis. All premium and discount is amortized and accreted for financial statement purposes and tax reporting purposes in accordance with generally accepted accounting principles and federal tax regulations, respectively. FEES PAID INDIRECTLY - Each fund's custody fee is reduced according to an arrangement that measures the value of cash deposited with the custodian by the fund. This amount, for the six months ended February 28, 2007, is shown as a reduction of total expenses on the Statement of Operations. TAX MATTERS AND DISTRIBUTIONS - Each fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. Accordingly, no provision for federal income tax is required in the financial statements. Foreign taxes, if any, have been accrued by the funds in the accompanying financial statements. Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. During the year ended August 31, 2006, there were no significant adjustments due to differences between book and tax accounting for the MFS Money Market Fund and MFS Government Money Market Fund, respectively. The tax character of distributions made during the current period will be determined at fiscal year end. The tax character of distributions declared to shareholders is as follows: GOVERNMENT MONEY MARKET MONEY MARKET FUND FUND 8/31/06 8/31/06 Ordinary income (including any short-term capital gains) $35,618,089 $860,483 The federal tax cost and the tax basis components of distributable earnings were as follows: GOVERNMENT MONEY MARKET MONEY MARKET AS OF 2/28/07 FUND FUND Cost of investments $1,101,280,850 $18,677,857 AS OF 8/31/06 Undistributed ordinary income $293,345 $2,346 Capital loss carryforwards (8,480) -- Post-October capital loss deferral (35) -- Other temporary differences (187,517) (7,781) The aggregate cost above includes prior fiscal year end tax adjustments. As of August 31, 2006, the MFS Money Market Fund had capital loss carryforwards available to offset future realized gains. Such losses expire as follows: MONEY MARKET FUND 8/31/11 $(8,329) 8/31/13 (151) ------------------------------------------------- $(8,480) In June 2006, FASB Interpretation No. 48, Accounting for Uncertainty in Income Taxes (the "Interpretation") was issued, and is effective for fiscal years beginning after December 15, 2006 and is to be applied to all open tax years as of the effective date. On December 22, 2006, the SEC delayed the implementation of the Interpretation for regulated investment companies for an additional six months. This Interpretation prescribes a minimum threshold for financial statement recognition of the benefit of a tax position taken or expected to be taken in a tax return, and requires certain expanded disclosures. Management is evaluating the application of the Interpretation to the fund, and has not at this time determined the impact, if any, resulting from the adoption of this Interpretation on each fund's financial statements. (3) TRANSACTIONS WITH AFFILIATES INVESTMENT ADVISER - Each fund has an investment advisory agreement with MFS to provide overall investment management and related administrative services and facilities to the funds. Each fund's management fee is computed daily and paid monthly at the following annual rates: First $300 million of average daily net assets 0.50% Next $400 million of average daily net assets 0.45% Next $300 million of average daily net assets 0.40% Average daily net assets in excess of $1 billion 0.35% As part of a settlement agreement with the New York Attorney General concerning market timing and related matters, MFS has agreed to reduce each fund's management fee to 0.15% of the fund's average daily net assets for the period March 1, 2004 through February 28, 2009. For the six months ended February 28, 2007, this waiver amounted to $1,505,078 and $34,662 for the MFS Money Market Fund and MFS Government Money Market Fund, respectively, and is reflected as a reduction of total expenses in the Statement of Operations. DISTRIBUTOR - Certain shares acquired through an exchange may be subject to a CDSC upon redemption depending on when the shares exchanged were originally purchased. Contingent deferred sales charges imposed during the six months ended February 28, 2007 for the MFS Money Market Fund and MFS Government Money Market Fund were $3,484 and $252, respectively. SHAREHOLDER SERVICING AGENT - MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from each fund for its services as shareholder servicing agent calculated as a percentage of the average daily net assets of each fund as determined periodically under the supervision of the fund's Board of Trustees. For the six months ended February 28, 2007, the fees were $383,927 and $7,625, which equated to 0.0759% and 0.0770% annually of each fund's average daily net assets for the MFS Money Market Fund and MFS Government Money Market Fund, respectively. Effective January 1, 2007, MFSC has entered into a sub-accounting agreement with SunLife Retirement Services (U.S.), Inc. (SRS), an affiliate of MFSC, on behalf of each fund to provide omnibus account services to the funds. MFSC pays SRS both an asset based fee and a per account charge of the assets held in the omnibus account. Each fund then reimburses MFSC for the sub-accounting fees paid to SRS. For the six months ended February 28, 2007, the sub-accounting fees for SRS were $70,768 and $1,108, which equated to 0.0140% and 0.0112% annually of each fund's average daily net assets for the MFS Money Market Fund and MFS Government Money Market Fund, respectively. MFSC also receives payment from each fund for out-of-pocket and sub-accounting expenses. For the six months ended February 28, 2007, these out-of-pocket and sub-accounting costs amounted to $157,104 and $4,004 for the MFS Money Market Fund and MFS Government Money Market Fund, respectively. Each fund may also pay shareholder servicing related costs directly to non-related parties. ADMINISTRATOR - MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to each fund. Under an administrative services agreement, the funds partially reimburse MFS the costs incurred to provide these services. Each fund is charged a fixed amount plus a fee based on calendar year average net assets. Each fund's annual fixed amount is $17,500. The administrative services fee incurred for the six months ended February 28, 2007 was equivalent to an annual effective rate of 0.0182% and 0.0876% of each fund's average daily net assets for the MFS Money Market Fund and MFS Government Money Market Fund, respectively. TRUSTEES' AND OFFICERS' COMPENSATION - Each fund pays compensation to independent trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. The funds do not pay compensation directly to trustees or officers of the funds who are also officers of the investment adviser, all of whom receive remuneration for their services to the funds from MFS. Certain officers and trustees of the funds are officers or directors of MFS, MFD, and MFSC. The funds have an unfunded, defined benefit plan for certain retired independent trustees which resulted in a pension expense of $2,305 and $513 for the MFS Money Market Fund and MFS Government Money Market Fund, respectively. The liability for deferred retirement benefits payable to certain retired independent trustees amounted to $39,882 and $6,598 for the MFS Money Market Fund and MFS Government Money Market Fund, respectively, at February 28, 2007, and is included in payable for independent trustees' compensation. OTHER - These funds and certain other MFS funds (the funds) have entered into a services agreement (the Agreement) which provides for payment of fees by the funds to Tarantino LLC in return for the provision of services of an Independent Chief Compliance Officer (ICCO) for the funds. The ICCO is an officer of the funds and the sole member of Tarantino LLC. The funds can terminate the Agreement with Tarantino LLC at any time under the terms of the Agreement. For the six months ended February 28, 2007, the fee paid to Tarantino LLC was $4,077 and $80 for the MFS Money Market Fund and MFS Government Money Market Fund, respectively. MFS has agreed to reimburse the funds for a portion of the payments made by the funds to Tarantino LLC in the amount of $2,650 and $53 for the MFS Money Market Fund and MFS Government Money Market Fund, respectively, which is shown as a reduction of total expenses in the Statement of Operations. Additionally, MFS has agreed to bear all expenses associated with office space, other administrative support, and supplies provided to the ICCO. (4) PORTFOLIO SECURITIES Purchases and sales of money market securities, exclusive of securities subject to repurchase agreements, were as follows: PURCHASES SALES MFS Money Market Fund $4,231,437,486 $4,031,286,746 MFS Government Money Market Fund 196,842,772 199,117,000 (5) SHARES OF BENEFICIAL INTEREST Each fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. The MFS Money Market Fund is one of several mutual funds in which the MFS funds-of-funds may invest. The MFS funds-of-funds do not invest in the underlying MFS funds for the purpose of exercising management or control. At the end of the period, the MFS Conservative Allocation Fund and MFS Moderate Allocation Fund were the owners of record of approximately 6% and 10%, respectively, of the value of outstanding voting shares. In addition, the MFS Lifetime Retirement Income Fund, the MFS Lifetime 2010 Fund, and the MFS Lifetime 2020 Fund were each the owners of record of less than 1% of the value of outstanding voting shares. (6) LINE OF CREDIT Each fund and other funds managed by MFS participate in a $1 billion unsecured committed line of credit provided by a syndication of banks under a credit agreement. In addition, each fund and other funds managed by MFS have established uncommitted borrowing arrangements with certain banks. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the Federal Reserve funds rate plus 0.35%. In addition, a commitment fee, based on the average daily, unused portion of the committed line of credit, is allocated among the participating funds at the end of each calendar quarter. For the six months ended February 28, 2007, the funds' commitment fees were $2,860 and $112 for the MFS Money Market Fund and MFS Government Money Market Fund, respectively and interest expense was $0 and $0 for the MFS Money Market Fund and MFS Government Money Market Fund, respectively. These amounts are included in miscellaneous expense on the Statement of Operations. BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT A discussion regarding the Board's most recent review and renewal of the Fund's investment advisory agreement is available by clicking on the fund's name under "Select a fund" on the MFS Web site (mfs.com). PROXY VOTING POLICIES AND INFORMATION A general description of the MFS funds' proxy voting policies and procedures is available without charge, upon request, by calling 1-800-225-2606, by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available without charge by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. QUARTERLY PORTFOLIO DISCLOSURE The fund will file a complete schedule of portfolio holdings with the Securities and Exchange Commission (the Commission) for the first and third quarters of each fiscal year on Form N-Q. The fund's Form N-Q may be reviewed and copied at the: Public Reference Room Securities and Exchange Commission 100 F Street, NE, Room 1580 Washington, D.C. 20549 Information on the operation of the Public Reference Room may be obtained by calling the Commission at 1-202-551-5850. The fund's Form N-Q is available on the EDGAR database on the Commission's Internet Web site at http://www.sec.gov, and copies of this information may be obtained, upon payment of a duplicating fee, by electronic request at the following e-mail address: publicinfo@sec.gov or by writing the Public Reference Section at the above address. A shareholder can also obtain the quarterly portfolio holdings report at mfs.com. CONTACT US WEB SITE MAILING ADDRESS mfs.com MFS Service Center, Inc. P.O. Box 55824 MFS TALK Boston, MA 02205-5824 1-800-637-8255 24 hours a day OVERNIGHT MAIL MFS Service Center, Inc. ACCOUNT SERVICE AND 500 Boylston Street LITERATURE Boston, MA 02116-3741 SHAREHOLDERS 1-800-225-2606 8 a.m. to 8 p.m. ET INVESTMENT PROFESSIONALS 1-800-343-2829 8 a.m. to 8 p.m. ET RETIREMENT PLAN SERVICES 1-800-637-1255 8 a.m. to 8 p.m. ET - ------------------------------------------------------------------------------- Go paperless with eDELIVERY: Arrange to have MFS send prospectuses, reports, and proxies directly to your e-mail inbox. You'll get timely information and less clutter in your mailbox (not to mention help your fund save printing and postage costs). SIGN UP: If your account is registered with us, simply go to mfs.com, log in to your account via MFS Access, and select the eDelivery sign up options. If you own your MFS fund shares through a financial institution or a retirement plan, MFS TALK, MFS Access, and eDelivery may not be available to you. - ------------------------------------------------------------------------------- M F S(R) INVESTMENT MANAGEMENT M F S(R) INVESTMENT MANAGEMENT [graphic omitted] Semiannual report MFS(R) MID CAP GROWTH FUND LETTER FROM THE CEO 1 - --------------------------------------------------------- PORTFOLIO COMPOSITION 2 - --------------------------------------------------------- EXPENSE TABLE 3 - --------------------------------------------------------- PORTFOLIO OF INVESTMENTS 5 - --------------------------------------------------------- STATEMENT OF ASSETS AND LIABILITIES 11 - --------------------------------------------------------- STATEMENT OF OPERATIONS 14 - --------------------------------------------------------- STATEMENTS OF CHANGES IN NET ASSETS 15 - --------------------------------------------------------- FINANCIAL HIGHLIGHTS 16 - --------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 25 - --------------------------------------------------------- BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT 36 - --------------------------------------------------------- PROXY VOTING POLICIES AND INFORMATION 36 - --------------------------------------------------------- QUARTERLY PORTFOLIO DISCLOSURE 36 - --------------------------------------------------------- CONTACT INFORMATION BACK COVER - --------------------------------------------------------- THE REPORT IS PREPARED FOR THE GENERAL INFORMATION OF SHAREHOLDERS. IT IS AUTHORIZED FOR DISTRIBUTION TO PROSPECTIVE INVESTORS ONLY WHEN PRECEDED OR ACCOMPANIED BY A CURRENT PROSPECTUS. - ------------------------------------------------------------------------------ NOT FDIC INSURED o MAY LOSE VALUE o NO BANK OR CREDIT UNION GUARANTEE o NOT A DEPOSIT o NOT INSURED BY ANY FEDERAL GOVERNMENT AGENCY OR NCUA/NCUSIF - ------------------------------------------------------------------------------ 2/28/07 OTC-SEM [Photo of Robert J. Manning] LETTER FROM THE CEO Dear Shareholders: The past year has been a great example of why investors should keep their eyes on the long term. In 2006 the Dow Jones Industrial Average returned 19%. In February 2007 it hit its all-time high of 12,787. Less than a week later, stocks sold off around the globe. By March 5 the Dow was off 5.8%. That is a sign of volatile markets and a reason investors should make sure they have an investment plan that can ride out the peaks and troughs. If you are focused on a long-term investment strategy, the short-term ups and downs of the markets should not necessarily dictate portfolio action on your part. Both the bond and stock markets are inherently cyclical. In our view, investors who remain committed to a long-term plan are more likely to achieve their financial goals. We believe you should not let the headlines guide you in your investment decisions and that there is no sense in reacting to short- term volatility. In any market environment, we believe individual investors are best served by following a three-pronged investment strategy of allocating their holdings across the major asset classes, diversifying within each class, and regularly rebalancing their portfolios to maintain their desired allocations. Of course, these strategies cannot guarantee a profit or protect against a loss. Investing and planning for the long term require diligence and patience, two traits that in our experience are essential to capitalizing on the many opportunities the financial markets can offer -- through both up and down economic cycles. Respectfully, /s/ Robert J. Manning Robert J. Manning Chief Executive Officer and Chief Investment Officer MFS Investment Management(R) April 16, 2007 The opinions expressed in this letter are subject to change, may not be relied upon for investment advice, and no forecasts can be guaranteed. PORTFOLIO COMPOSITION PORTFOLIO STRUCTURE Common Stocks 99.3% Cash & Other Net Assets 0.7% TOP TEN HOLDINGS Williams Cos., Inc. 2.7% ------------------------------------------------- Hess Corp. 2.4% ------------------------------------------------- Phillips-Van Heusen Corp. 2.3% ------------------------------------------------- International Game Technology 2.3% ------------------------------------------------- Cognizant Technology Solutions Corp., "A" 2.3% ------------------------------------------------- Rockwell Automation, Inc. 2.2% ------------------------------------------------- YUM! Brands, Inc. 2.2% ------------------------------------------------- Humana, Inc. 2.1% ------------------------------------------------- Kroger Co. 2.1% ------------------------------------------------- Cummins, Inc. 2.0% ------------------------------------------------- EQUITY SECTORS Health Care 17.5% ------------------------------------------------- Technology 12.1% ------------------------------------------------- Retailing 10.8% ------------------------------------------------- Special Products & Services 9.4% ------------------------------------------------- Financial Services 8.6% ------------------------------------------------- Utilities & Communications 7.8% ------------------------------------------------- Leisure 7.7% ------------------------------------------------- Industrial Goods & Services 7.5% ------------------------------------------------- Energy 5.0% ------------------------------------------------- Autos & Housing 4.6% ------------------------------------------------- Consumer Staples 3.7% ------------------------------------------------- Transportation 2.4% ------------------------------------------------- Basic Materials 2.2% ------------------------------------------------- Percentages are based on net assets as of 2/28/07. The portfolio is actively managed and current holdings may be different. EXPENSE TABLE Fund expenses borne by the shareholders during the period, September 1, 2006 through February 28, 2007 As a shareholder of the fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments and redemption fees on certain exchanges and redemptions, and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period September 1, 2006 through February 28, 2007. ACTUAL EXPENSES The first line for each share class in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES The second line for each share class in the following table provides information about hypothetical account values and hypothetical expenses based on the fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption fees. Therefore, the second line for each share class in the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher. - ------------------------------------------------------------------------------- Expenses Paid During Annualized Beginning Ending Period(p) Share Expense Account Value Account Value 9/01/06- Class Ratio 9/01/06 2/28/07 2/28/07 - -------------------------------------------------------------------------------- Actual 1.28% $1,000.00 $1,125.70 $6.75 A -------------------------------------------------------------------------- Hypothetical (h) 1.28% $1,000.00 $1,018.45 $6.41 - -------------------------------------------------------------------------------- Actual 2.03% $1,000.00 $1,123.50 $10.69 B -------------------------------------------------------------------------- Hypothetical (h) 2.03% $1,000.00 $1,014.73 $10.14 - -------------------------------------------------------------------------------- Actual 2.03% $1,000.00 $1,122.50 $10.68 C -------------------------------------------------------------------------- Hypothetical (h) 2.03% $1,000.00 $1,014.73 $10.14 - -------------------------------------------------------------------------------- Actual 1.03% $1,000.00 $1,128.30 $5.44 I -------------------------------------------------------------------------- Hypothetical (h) 1.03% $1,000.00 $1,019.69 $5.16 - -------------------------------------------------------------------------------- Actual 1.53% $1,000.00 $1,125.70 $8.06 R -------------------------------------------------------------------------- Hypothetical (h) 1.53% $1,000.00 $1,017.21 $7.65 - -------------------------------------------------------------------------------- Actual 2.13% $1,000.00 $1,121.10 $11.20 R1 -------------------------------------------------------------------------- Hypothetical (h) 2.13% $1,000.00 $1,014.23 $10.64 - -------------------------------------------------------------------------------- Actual 1.78% $1,000.00 $1,123.20 $9.37 R2 -------------------------------------------------------------------------- Hypothetical (h) 1.78% $1,000.00 $1,015.97 $8.90 - -------------------------------------------------------------------------------- Actual 1.68% $1,000.00 $1,125.30 $8.85 R3 -------------------------------------------------------------------------- Hypothetical (h) 1.68% $1,000.00 $1,016.46 $8.40 - -------------------------------------------------------------------------------- Actual 1.43% $1,000.00 $1,126.00 $7.54 R4 -------------------------------------------------------------------------- Hypothetical (h) 1.43% $1,000.00 $1,017.70 $7.15 - -------------------------------------------------------------------------------- Actual 1.13% $1,000.00 $1,127.90 $5.96 R5 -------------------------------------------------------------------------- Hypothetical (h) 1.13% $1,000.00 $1,019.19 $5.66 - -------------------------------------------------------------------------------- Actual 1.63% $1,000.00 $1,124.90 $8.59 529A -------------------------------------------------------------------------- Hypothetical (h) 1.63% $1,000.00 $1,016.71 $8.15 - -------------------------------------------------------------------------------- Actual 2.28% $1,000.00 $1,122.00 $12.00 529B -------------------------------------------------------------------------- Hypothetical (h) 2.28% $1,000.00 $1,013.49 $11.38 - -------------------------------------------------------------------------------- Actual 2.28% $1,000.00 $1,122.30 $12.00 529C -------------------------------------------------------------------------- Hypothetical (h) 2.28% $1,000.00 $1,013.49 $11.38 - -------------------------------------------------------------------------------- (h) 5% class return per year before expenses. (p) Expenses paid is equal to each class' annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by the number of days in the period, divided by the number of days in the year. Expenses paid do not include any applicable sales charges (loads) or redemption fees. If these transaction costs had been included, your costs would have been higher. PORTFOLIO OF INVESTMENTS 2/28/07 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Common Stocks - 99.3% - ---------------------------------------------------------------------------------------------------- ISSUER SHARES/PAR VALUE ($) - ---------------------------------------------------------------------------------------------------- Aerospace - 0.8% - ---------------------------------------------------------------------------------------------------- Precision Castparts Corp. 116,840 $ 10,628,935 - ---------------------------------------------------------------------------------------------------- Airlines - 2.4% - ---------------------------------------------------------------------------------------------------- AMR Corp. (a) 628,107 $ 21,412,168 Continental Airlines, Inc. (a)(l) 102,770 4,069,692 UAL Corp. (a) 185,420 7,414,946 --------------- $ 32,896,806 - ---------------------------------------------------------------------------------------------------- Apparel Manufacturers - 4.1% - ---------------------------------------------------------------------------------------------------- Coach, Inc. (a) 532,160 $ 25,117,952 Phillips-Van Heusen Corp. 563,492 30,901,901 --------------- $ 56,019,853 - ---------------------------------------------------------------------------------------------------- Automotive - 0.7% - ---------------------------------------------------------------------------------------------------- Goodyear Tire & Rubber Co. (a)(l) 371,380 $ 9,143,376 - ---------------------------------------------------------------------------------------------------- Biotechnology - 1.8% - ---------------------------------------------------------------------------------------------------- Genzyme Corp. (a) 141,080 $ 8,718,744 Millipore Corp. (a) 215,080 15,382,522 --------------- $ 24,101,266 - ---------------------------------------------------------------------------------------------------- Brokerage & Asset Managers - 2.4% - ---------------------------------------------------------------------------------------------------- Affiliated Managers Group, Inc. (a)(l) 20,782 $ 2,358,757 Chicago Mercantile Exchange Holdings, Inc., "A" 35,410 19,090,593 Investment Technology Group, Inc. (a) 87,010 3,561,319 Legg Mason, Inc. 73,880 7,590,431 --------------- $ 32,601,100 - ---------------------------------------------------------------------------------------------------- Business Services - 5.8% - ---------------------------------------------------------------------------------------------------- Amdocs Ltd. (a) 640,500 $ 22,167,705 CheckFree Corp. (a) 215,404 8,168,120 Cognizant Technology Solutions Corp., "A" (a) 341,285 30,783,907 Corporate Executive Board Co. 211,213 16,434,483 Fidelity National Information Services, Inc. 19,450 893,727 --------------- $ 78,447,942 - ---------------------------------------------------------------------------------------------------- Cable TV - 0.4% - ---------------------------------------------------------------------------------------------------- EchoStar Communications Corp., "A" (a) 147,580 $ 5,991,748 - ---------------------------------------------------------------------------------------------------- Chemicals - 0.5% - ---------------------------------------------------------------------------------------------------- Celanese Corp. 234,440 $ 6,700,295 - ---------------------------------------------------------------------------------------------------- Computer Software - 3.3% - ---------------------------------------------------------------------------------------------------- Akamai Technologies, Inc. (a) 15,460 $ 797,272 Compuware Corp. (a) 152,970 1,399,675 Hyperion Solutions Corp. (a) 76,250 3,266,550 McAfee, Inc. (a) 815,270 24,555,932 TIBCO Software, Inc. (a) 1,325,430 11,995,142 Transaction Systems Architects, Inc. (a) 74,327 2,623,743 --------------- $ 44,638,314 - ---------------------------------------------------------------------------------------------------- Construction - 3.9% - ---------------------------------------------------------------------------------------------------- Masco Corp. 327,510 $ 9,776,173 NVR, Inc. (a) 35,784 24,225,768 Sherwin-Williams Co. 277,220 18,448,991 --------------- $ 52,450,932 - ---------------------------------------------------------------------------------------------------- Consumer Goods & Services - 6.6% - ---------------------------------------------------------------------------------------------------- Avon Products, Inc. 405,130 $ 14,852,066 Estee Lauder Cos., Inc., "A" 534,468 25,590,328 ITT Educational Services, Inc. (a) 319,910 $ 25,586,402 Monster Worldwide, Inc. (a) 478,032 23,834,675 --------------- $ 89,863,471 - ---------------------------------------------------------------------------------------------------- Electrical Equipment - 3.3% - ---------------------------------------------------------------------------------------------------- Rockwell Automation, Inc. (l) 485,750 $ 30,160,218 W.W. Grainger, Inc. 185,100 14,280,465 --------------- $ 44,440,683 - ---------------------------------------------------------------------------------------------------- Electronics - 5.0% - ---------------------------------------------------------------------------------------------------- KLA-Tencor Corp. 184,520 $ 9,547,065 MEMC Electronic Materials, Inc. (a) 40,310 2,078,787 Novellus Systems, Inc. (a)(l) 499,120 16,071,664 On Semiconductor Corp. (a) 219,550 2,155,981 SanDisk Corp. (a) 393,885 14,345,292 Synopsys, Inc. (a) 149,930 3,835,209 Tessera Technologies, Inc. (a)(l) 129,873 5,249,467 Varian Semiconductor Equipment Associates, Inc. (a) 306,160 14,631,386 --------------- $ 67,914,851 - ---------------------------------------------------------------------------------------------------- Energy - Integrated - 2.4% - ---------------------------------------------------------------------------------------------------- Hess Corp. 603,093 $ 31,994,084 - ---------------------------------------------------------------------------------------------------- Food & Beverages - 0.7% - ---------------------------------------------------------------------------------------------------- Pepsi Bottling Group, Inc. 291,710 $ 9,043,010 - ---------------------------------------------------------------------------------------------------- Food & Drug Stores - 2.1% - ---------------------------------------------------------------------------------------------------- Kroger Co. 1,102,732 $ 28,307,130 - ---------------------------------------------------------------------------------------------------- Gaming & Lodging - 4.5% - ---------------------------------------------------------------------------------------------------- International Game Technology 746,280 $ 30,784,050 Penn National Gaming, Inc. (a)(l) 564,530 26,324,034 Royal Caribbean Cruises Ltd. 112,320 4,552,330 --------------- $ 61,660,414 - ---------------------------------------------------------------------------------------------------- General Merchandise - 0.3% - ---------------------------------------------------------------------------------------------------- Family Dollar Stores, Inc. (l) 125,920 $ 3,647,902 - ---------------------------------------------------------------------------------------------------- Health Maintenance Organizations - 4.4% - ---------------------------------------------------------------------------------------------------- AMERIGROUP Corp. (a) 550,119 $ 18,197,936 Humana, Inc. (a) 475,077 28,428,608 WellCare Health Plans, Inc. (a) 160,600 13,186,866 --------------- $ 59,813,410 - ---------------------------------------------------------------------------------------------------- Insurance - 3.3% - ---------------------------------------------------------------------------------------------------- Ace Ltd. 250,210 $ 14,051,794 Genworth Financial, Inc., "A" 626,620 22,163,549 MGIC Investment Corp. 79,750 4,812,912 W.R. Berkley Corp. 34,620 1,128,612 XL Capital Ltd., "A" 36,870 2,617,770 --------------- $ 44,774,637 - ---------------------------------------------------------------------------------------------------- Internet - 1.1% - ---------------------------------------------------------------------------------------------------- RealNetworks, Inc. (a)(l) 1,763,342 $ 14,388,871 - ---------------------------------------------------------------------------------------------------- Leisure & Toys - 0.2% - ---------------------------------------------------------------------------------------------------- Marvel Entertainment, Inc. (a)(l) 70,380 $ 1,955,860 THQ, Inc. (a) 28,930 931,835 --------------- $ 2,887,695 - ---------------------------------------------------------------------------------------------------- Machinery & Tools - 3.4% - ---------------------------------------------------------------------------------------------------- Cummins, Inc. 200,270 $ 26,972,364 Eaton Corp. 95,600 7,744,556 Parker Hannifin Corp. 54,490 4,489,431 Timken Co. 225,710 6,450,792 --------------- $ 45,657,143 - ---------------------------------------------------------------------------------------------------- Medical & Health Technology & Services - 1.5% - ---------------------------------------------------------------------------------------------------- Emdeon Corp. (a)(l) 748,554 $ 11,183,397 McKesson Corp. 80,670 4,498,159 VCA Antech, Inc. (a) 122,516 4,497,562 --------------- $ 20,179,118 - ---------------------------------------------------------------------------------------------------- Medical Equipment - 7.0% - ---------------------------------------------------------------------------------------------------- Advanced Medical Optics, Inc. (a)(l) 421,870 $ 16,258,870 Cooper Cos., Inc. 189,640 8,702,580 Cytyc Corp. (a) 682,549 20,681,235 DENTSPLY International, Inc. 410,650 12,951,901 Immucor, Inc. (a) 224,146 6,666,102 Mentor Corp. (l) 94,340 4,529,263 Waters Corp. (a) 457,174 24,806,261 --------------- $ 94,596,212 - ---------------------------------------------------------------------------------------------------- Metals & Mining - 0.5% - ---------------------------------------------------------------------------------------------------- AK Steel Holding Corp. (a) 196,600 $ 4,547,358 Cleveland-Cliffs, Inc. 52,500 2,961,000 --------------- $ 7,508,358 - ---------------------------------------------------------------------------------------------------- Natural Gas - Pipeline - 2.7% - ---------------------------------------------------------------------------------------------------- Williams Cos., Inc. (l) 1,342,010 $ 36,194,010 - ---------------------------------------------------------------------------------------------------- Network & Telecom - 0.4% - ---------------------------------------------------------------------------------------------------- InterDigital Communications Corp. (a)(l) 155,140 $ 5,386,461 - ---------------------------------------------------------------------------------------------------- Oil Services - 2.6% - ---------------------------------------------------------------------------------------------------- Cameron International Corp. (a) 318,830 $ 18,074,473 GlobalSantaFe Corp. 181,860 10,480,592 Smith International, Inc. 150,460 6,168,860 --------------- $ 34,723,925 - ---------------------------------------------------------------------------------------------------- Other Banks & Diversified Financials - 2.7% - ---------------------------------------------------------------------------------------------------- Bank of Hawaii Corp. 16,880 $ 873,034 CapitalSource, Inc., REIT 183,960 4,744,328 Commerce Bancorp, Inc. 40,540 1,354,847 First Marblehead Corp. 463,145 20,906,365 IndyMac Bancorp, Inc. 215,629 7,402,543 Northern Trust Corp. 31,350 1,890,405 --------------- $ 37,171,522 - ---------------------------------------------------------------------------------------------------- Personal Computers & Peripherals - 2.3% - ---------------------------------------------------------------------------------------------------- Lexmark International, Inc., "A" (a) 344,620 $ 20,870,187 Network Appliance, Inc. (a) 251,510 9,725,892 Nuance Communications, Inc. (a)(l) 67,123 945,763 --------------- $ 31,541,842 - ---------------------------------------------------------------------------------------------------- Pharmaceuticals - 2.8% - ---------------------------------------------------------------------------------------------------- Allergan, Inc. 62,860 $ 7,022,091 Endo Pharmaceuticals Holdings, Inc. (a) 785,627 24,519,419 Medicis Pharmaceutical Corp., "A" (l) 117,150 4,259,574 Warner Chilcott Ltd., "A" (a) 177,810 $ 2,645,813 --------------- $ 38,446,897 - ---------------------------------------------------------------------------------------------------- Real Estate - 0.2% - ---------------------------------------------------------------------------------------------------- Corrections Corp. of America (a) 57,370 $ 3,003,893 - ---------------------------------------------------------------------------------------------------- Restaurants - 2.6% - ---------------------------------------------------------------------------------------------------- Brinker International, Inc. 52,130 $ 1,772,941 Jack in the Box, Inc. (a) 64,620 4,416,131 YUM! Brands, Inc. 506,340 29,337,340 --------------- $ 35,526,412 - ---------------------------------------------------------------------------------------------------- Specialty Chemicals - 1.2% - ---------------------------------------------------------------------------------------------------- Praxair, Inc. 266,620 $ 16,447,788 - ---------------------------------------------------------------------------------------------------- Specialty Stores - 4.3% - ---------------------------------------------------------------------------------------------------- Advance Auto Parts, Inc. 33,540 $ 1,262,781 Aeropostale, Inc. (a) 555,273 20,345,203 Dick's Sporting Goods, Inc. (a) 70,350 3,682,119 Group 1 Automotive, Inc. 277,050 12,819,103 Limited Brands, Inc. (l) 142,000 3,930,560 OfficeMax, Inc. 170,610 8,854,659 Radioshack Corp. (l) 200,660 5,010,480 Urban Outfitters, Inc. (a) 90,890 2,255,890 --------------- $ 58,160,795 - ---------------------------------------------------------------------------------------------------- Telephone Services - 2.5% - ---------------------------------------------------------------------------------------------------- American Tower Corp., "A" (a) 228,870 $ 8,866,424 Embarq Corp. 457,262 25,309,452 --------------- $ 34,175,876 - ---------------------------------------------------------------------------------------------------- Utilities - Electric Power - 2.6% - ---------------------------------------------------------------------------------------------------- Constellation Energy Group, Inc. 239,540 $ 18,844,612 Mirant Corp. (a) 376,140 14,014,976 NRG Energy, Inc. (a) 41,680 2,760,883 --------------- $ 35,620,471 - ---------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (IDENTIFIED COST, $1,205,764,722) $ 1,346,697,448 - ---------------------------------------------------------------------------------------------------- Short-Term Obligations - 0.9% - ---------------------------------------------------------------------------------------------------- General Electric Capital Corp., 5.32%, due 3/01/07, at Amortized Cost and Value (y) $ 12,451,000 $ 12,451,000 - ---------------------------------------------------------------------------------------------------- Collateral for Securities Loaned - 6.5% - ---------------------------------------------------------------------------------------------------- Navigator Securities Lending Prime Portfolio, at Cost and Net Asset Value 87,943,880 $ 87,943,880 - ---------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS (IDENTIFIED COST, $1,306,159,602) $ 1,447,092,328 - ---------------------------------------------------------------------------------------------------- Other Assets, Less Liabilities - (6.7)% (90,439,726) - ---------------------------------------------------------------------------------------------------- NET ASSETS - 100.0% $ 1,356,652,602 - ---------------------------------------------------------------------------------------------------- (a) Non-income producing security. (l) All or a portion of this security is on loan. (y) The rate shown represents an annualized yield at time of purchase. The following abbreviations are used in this report and are defined: REIT Real Estate Investment Trust SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF ASSETS AND LIABILITIES At 2/28/07 (unaudited) This statement represents your fund's balance sheet, which details the assets and liabilities comprising the total value of the fund. ASSETS - ------------------------------------------------------------------------------------------------------- Investments, at value, including $85,663,837 of securities on loan (identified cost, $1,306,159,602) $1,447,092,328 Cash 347 Receivable for investments sold 20,782,307 Receivable for fund shares sold 3,284,836 Interest and dividends receivable 777,886 Other assets 375,385 - ------------------------------------------------------------------------------------------------------- Total assets $1,472,313,089 - ------------------------------------------------------------------------------------------------------- LIABILITIES - ------------------------------------------------------------------------------------------------------- Payable for investments purchased $21,062,767 Payable for fund shares reacquired 5,730,767 Collateral for securities loaned, at value 87,943,880 Payable to affiliates Management fee 56,436 Shareholder servicing costs 497,067 Distribution and service fees 23,990 Administrative services fee 1,348 Program manager fees 16 Retirement plan administration and services fees 232 Payable for independent trustees' compensation 107,982 Accrued expenses and other liabilities 236,002 - ------------------------------------------------------------------------------------------------------- Total liabilities $115,660,487 - ------------------------------------------------------------------------------------------------------- Net assets $1,356,652,602 - ------------------------------------------------------------------------------------------------------- NET ASSETS CONSIST OF - ------------------------------------------------------------------------------------------------------- Paid-in capital $2,394,220,447 Unrealized appreciation (depreciation) on investments and translation of assets and liabilities in foreign currencies 140,932,726 Accumulated net realized gain (loss) on investments (1,180,135,362) Undistributed net investment income 1,634,791 - ------------------------------------------------------------------------------------------------------- Net assets $1,356,652,602 - ------------------------------------------------------------------------------------------------------- Shares of beneficial interest outstanding 141,501,873 - ------------------------------------------------------------------------------------------------------- Statement of Assets and Liabilities (unaudited) - continued Class A shares - ------------------------------------------------------------------------------------------------------- Net assets $428,341,938 Shares outstanding 44,276,965 - ------------------------------------------------------------------------------------------------------- Net asset value per share $9.67 - ------------------------------------------------------------------------------------------------------- Offering price per share (100/94.25Xnet asset value per share $10.26 - ------------------------------------------------------------------------------------------------------- Class B shares - ------------------------------------------------------------------------------------------------------- Net assets $246,849,216 Shares outstanding 27,133,325 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $9.10 - ------------------------------------------------------------------------------------------------------- Class C shares - ------------------------------------------------------------------------------------------------------- Net assets $72,593,453 Shares outstanding 8,163,901 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $8.89 - ------------------------------------------------------------------------------------------------------- Class I shares - ------------------------------------------------------------------------------------------------------- Net assets $565,291,150 Shares outstanding 57,408,573 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $9.85 - ------------------------------------------------------------------------------------------------------- Class R shares - ------------------------------------------------------------------------------------------------------- Net assets $4,929,736 Shares outstanding 514,844 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $9.58 - ------------------------------------------------------------------------------------------------------- Class R1 shares - ------------------------------------------------------------------------------------------------------- Net assets $668,711 Shares outstanding 73,695 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $9.07 - ------------------------------------------------------------------------------------------------------- Class R2 shares - ------------------------------------------------------------------------------------------------------- Net assets $410,569 Shares outstanding 44,994 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $9.12 - ------------------------------------------------------------------------------------------------------- Class R3 shares - ------------------------------------------------------------------------------------------------------- Net assets $2,440,516 Shares outstanding 256,426 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $9.52 - ------------------------------------------------------------------------------------------------------- Statement of Assets and Liabilities (unaudited) - continued Class R4 shares - ------------------------------------------------------------------------------------------------------- Net assets $1,928,584 Shares outstanding 199,913 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $9.65 - ------------------------------------------------------------------------------------------------------- Class R5 shares - ------------------------------------------------------------------------------------------------------- Net assets $32,035,062 Shares outstanding 3,303,803 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $9.70 - ------------------------------------------------------------------------------------------------------- Class 529A shares - ------------------------------------------------------------------------------------------------------- Net assets $703,891 Shares outstanding 73,741 - ------------------------------------------------------------------------------------------------------- Net asset value per share $9.55 - ------------------------------------------------------------------------------------------------------- Offering price per share (100/94.25Xnet asset value per share) $10.13 - ------------------------------------------------------------------------------------------------------- Class 529B shares - ------------------------------------------------------------------------------------------------------- Net assets $204,715 Shares outstanding 22,728 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $9.01 - ------------------------------------------------------------------------------------------------------- Class 529C shares - ------------------------------------------------------------------------------------------------------- Net assets $255,061 Shares outstanding 28,965 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $8.81 - ------------------------------------------------------------------------------------------------------- On sales of $50,000 or more, the offering prices of Class A and Class 529A shares are reduced. A contingent deferred sales charge may be imposed on redemptions of Class A, Class B, Class C, Class 529B, and Class 529C shares. SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF OPERATIONS Six months ended 2/28/07 (unaudited) This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. NET INVESTMENT INCOME - ------------------------------------------------------------------------------------------------------ Income Dividends $10,387,518 Interest 471,703 Other 352,409 - ------------------------------------------------------------------------------------------------------ Total investment income $11,211,630 - ------------------------------------------------------------------------------------------------------ Expenses Management fee $5,228,356 Distribution and service fees 2,316,946 Program manager fees 1,486 Shareholder servicing costs 1,368,279 Administrative services fee 124,709 Retirement plan administration and services fees 25,707 Independent trustees' compensation 33,976 Custodian fee 217,536 Shareholder communications 89,926 Auditing fees 21,988 Legal fees 22,122 Miscellaneous 96,071 - ------------------------------------------------------------------------------------------------------ Total expenses $9,547,102 - ------------------------------------------------------------------------------------------------------ Fees paid indirectly (57,409) Reduction of expenses by investment adviser (5,447) - ------------------------------------------------------------------------------------------------------ Net expenses $9,484,246 - ------------------------------------------------------------------------------------------------------ Net investment income $1,727,384 - ------------------------------------------------------------------------------------------------------ REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS - ------------------------------------------------------------------------------------------------------ Realized gain (loss) (identified cost basis) Net realized gain (loss) on investments $45,002,745 - ------------------------------------------------------------------------------------------------------ Change in unrealized appreciation (depreciation) Net unrealized gain (loss) on investments $121,693,928 - ------------------------------------------------------------------------------------------------------ Net realized and unrealized gain (loss) on investments $166,696,673 - ------------------------------------------------------------------------------------------------------ Change in net assets from operations $168,424,057 - ------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENTS OF CHANGES IN NET ASSETS These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. SIX MONTHS ENDED YEAR ENDED 2/28/07 8/31/06 (UNAUDITED) CHANGE IN NET ASSETS FROM OPERATIONS - ------------------------------------------------------------------------------------------------------- Net investment income (loss) $1,727,384 $(14,279,912) Net realized gain (loss) on investments 45,002,745 150,147,104 Net unrealized gain (loss) on investments 121,693,928 (170,595,975) - ------------------------------------------------------------------------------------------------------- Change in net assets from operations $168,424,057 $(34,728,783) - ------------------------------------------------------------------------------------------------------- Change in net assets from fund share transactions $(215,771,221) $(408,077,936) - ------------------------------------------------------------------------------------------------------- Total change in net assets $(47,347,164) $(442,806,719) - ------------------------------------------------------------------------------------------------------- NET ASSETS - ------------------------------------------------------------------------------------------------------- At beginning of period 1,403,999,766 1,846,806,485 At end of period (including undistributed net investment income of $1,634,791 and accumulated net investment loss of $92,593) $1,356,652,602 $1,403,999,766 - ------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Statements FINANCIAL HIGHLIGHTS The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years (or life of a particular share class, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate by which an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period. SIX MONTHS YEARS ENDED 8/31 ENDED ----------------------------------------------------------------------- CLASS A 2/28/07 2006 2005 2004 2003 2002 (UNAUDITED) Net asset value, beginning of period $8.59 $8.88 $7.58 $7.43 $5.84 $10.50 - ------------------------------------------------------------------------------------------------------------------------------ INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------------ Net investment income (loss) (d) $0.02 $(0.07) $(0.07) $(0.08) $(0.05) $(0.08) Net realized and unrealized gain (loss) on investments and foreign currency 1.06 (0.22) 1.37 0.23 1.64 (4.42) - ------------------------------------------------------------------------------------------------------------------------------ Total from investment operations $1.08 $(0.29) $1.30 $0.15 $1.59 $(4.50) - ------------------------------------------------------------------------------------------------------------------------------ LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------------------------ From net realized gain on investments and foreign currency transactions $-- $-- $-- $-- $-- $(0.15) From paid-in capital -- -- -- -- -- (0.01) - ------------------------------------------------------------------------------------------------------------------------------ Total distributions declared to shareholders $-- $-- $-- $-- $-- $(0.16) - ------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $9.67 $8.59 $8.88 $7.58 $7.43 $5.84 - ------------------------------------------------------------------------------------------------------------------------------ Total return (%) (r)(s)(t) 12.57(n) (3.27) 17.15 2.02(b) 27.23 (43.48) - ------------------------------------------------------------------------------------------------------------------------------ RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------------ Expenses before expense reductions(f) 1.28(a) 1.29 1.29 1.26 1.34 1.39 Expenses after expense reductions(f) 1.28(a) 1.29 1.29 1.26 N/A N/A Net investment income (loss) 0.33(a) (0.73) (0.84) (0.98) (0.76) (0.87) Portfolio turnover 54 122 67 94 120 147 Net assets at end of period (000 Omitted) $428,342 $515,048 $931,140 $1,092,443 $1,182,259 $946,866 - ------------------------------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued SIX MONTHS YEARS ENDED 8/31 ENDED --------------------------------------------------------------------- CLASS B 2/28/07 2006 2005 2004 2003 2002 (UNAUDITED) Net asset value, beginning of period $8.10 $8.45 $7.26 $7.17 $5.68 $10.22 - ------------------------------------------------------------------------------------------------------------------------------ INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------------ Net investment loss (d) $(0.02) $(0.13) $(0.13) $(0.13) $(0.09) $(0.14) Net realized and unrealized gain (loss) on investments and foreign currency 1.02 (0.22) 1.32 0.22 1.58 (4.32) - ------------------------------------------------------------------------------------------------------------------------------ Total from investment operations $1.00 $(0.35) $1.19 $0.09 $1.49 $(4.46) - ------------------------------------------------------------------------------------------------------------------------------ LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------------------------ From net realized gain on investments and foreign currency transactions $-- $-- $-- $-- $-- $(0.07) From paid-in capital -- -- -- -- -- (0.01) - ------------------------------------------------------------------------------------------------------------------------------ Total distributions declared to shareholders $-- $-- $-- $-- $-- $(0.08) - ------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $9.10 $8.10 $8.45 $7.26 $7.17 $5.68 - ------------------------------------------------------------------------------------------------------------------------------ Total return (%) (r)(s)(t) 12.35(n) (4.14) 16.39 1.26(b) 26.23 (43.94) - ------------------------------------------------------------------------------------------------------------------------------ RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------------ Expenses before expense reductions (f) 2.03(a) 2.04 2.04 2.01 2.09 2.14 Expenses after expense reductions (f) 2.03(a) 2.04 2.04 2.01 N/A N/A Net investment loss (0.41)(a) (1.48) (1.59) (1.73) (1.51) (1.60) Portfolio turnover 54 122 67 94 120 147 Net assets at end of period (000 Omitted) $246,849 $271,832 $384,712 $446,415 $498,021 $450,803 - ------------------------------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued SIX MONTHS YEARS ENDED 8/31 ENDED -------------------------------------------------------------------- CLASS C 2/28/07 2006 2005 2004 2003 2002 (UNAUDITED) Net asset value, beginning of period $7.92 $8.26 $7.10 $7.01 $5.55 $10.00 - ------------------------------------------------------------------------------------------------------------------------------ INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------------ Net investment loss (d) $(0.02) $(0.12) $(0.13) $(0.13) $(0.09) $(0.14) Net realized and unrealized gain (loss) on investments and foreign currency 0.99 (0.22) 1.29 0.22 1.55 (4.22) - ------------------------------------------------------------------------------------------------------------------------------ Total from investment operations $0.97 $(0.34) $1.16 $0.09 $1.46 $(4.36) - ------------------------------------------------------------------------------------------------------------------------------ LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------------------------ From net realized gain on investments and foreign currency transactions $-- $-- $-- $-- $-- $(0.08) From paid-in capital -- -- -- -- -- (0.01) - ------------------------------------------------------------------------------------------------------------------------------ Total distributions declared to shareholders $-- $-- $-- $-- $-- $(0.09) - ------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $8.89 $7.92 $8.26 $7.10 $7.01 $5.55 - ------------------------------------------------------------------------------------------------------------------------------ Total return (%) (r)(s)(t) 12.25(n) (4.12) 16.34 1.28(b) 26.31 (43.94) - ------------------------------------------------------------------------------------------------------------------------------ RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------------ Expenses before expense reductions (f) 2.03(a) 2.04 2.04 2.01 2.09 2.14 Expenses after expense reductions (f) 2.03(a) 2.04 2.04 2.01 N/A N/A Net investment loss (0.41)(a) (1.48) (1.59) (1.73) (1.51) (1.60) Portfolio turnover 54 122 67 94 120 147 Net assets at end of period (000 Omitted) $72,593 $80,563 $115,894 $139,797 $172,466 $176,786 - ------------------------------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued SIX MONTHS YEARS ENDED 8/31 ENDED -------------------------------------------------------------------- CLASS I 2/28/07 2006 2005 2004 2003 2002 (UNAUDITED) Net asset value, beginning of period $8.73 $9.01 $7.67 $7.49 $5.87 $10.55 - ------------------------------------------------------------------------------------------------------------------------------ INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------------ Net investment income (loss) (d) $0.03 $(0.04) $(0.05) $(0.06) $(0.03) $(0.05) Net realized and unrealized gain (loss) on investments and foreign currency 1.09 (0.24) 1.39 0.24 1.65 (4.46) - ------------------------------------------------------------------------------------------------------------------------------ Total from investment operations $1.12 $(0.28) $1.34 $0.18 $1.62 $(4.51) - ------------------------------------------------------------------------------------------------------------------------------ LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------------------------ From net realized gain on investments and foreign currency transactions $-- $-- $-- $-- $-- $(0.16) From paid-in capital -- -- -- -- -- (0.01) - ------------------------------------------------------------------------------------------------------------------------------ Total distributions declared to shareholders $-- $-- $-- $-- $-- $(0.17) - ------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $9.85 $8.73 $9.01 $7.67 $7.49 $5.87 - ------------------------------------------------------------------------------------------------------------------------------ Total return (%) (r)(s) 12.83(n) (3.11) 17.47 2.40(b) 27.60 (43.38) - ------------------------------------------------------------------------------------------------------------------------------ RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------------ Expenses before expense reductions (f) 1.03(a) 1.04 1.04 1.01 1.11 1.14 Expenses after expense reductions (f) 1.03(a) 1.04 1.04 1.01 N/A N/A Net investment income (loss) 0.58(a) (0.46) (0.58) (0.72) (0.53) (0.63) Portfolio turnover 54 122 67 94 120 147 Net assets at end of period (000 Omitted) $565,291 $485,841 $399,423 $270,934 $109,332 $31,798 - ------------------------------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued SIX MONTHS YEARS ENDED 8/31 ENDED --------------------------------------------------------- CLASS R 2/28/07 2006 2005 2004 2003(i) (UNAUDITED) Net asset value, beginning of period $8.51 $8.83 $7.55 $7.42 $5.64 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $0.00(w) $(0.09) $(0.09) $(0.10) $(0.05) Net realized and unrealized gain (loss) on investments and foreign currency 1.07 (0.23) 1.37 0.23 1.83 - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $1.07 $(0.32) $1.28 $0.13 $1.78 - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $9.58 $8.51 $8.83 $7.55 $7.42 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 12.57(n) (3.62) 16.95 1.75(b) 31.56(n) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.53(a) 1.54 1.55 1.50 1.67(a) Expenses after expense reductions (f) 1.53(a) 1.54 1.55 1.50 N/A Net investment income (loss) 0.07(a) (0.99) (1.07) (1.22) (1.16)(a) Portfolio turnover 54 122 67 94 120 Net assets at end of period (000 Omitted) $4,930 $5,978 $12,904 $5,177 $2,039 - -------------------------------------------------------------------------------------------------------------------------- SIX MONTHS YEARS ENDED 8/31 ENDED ----------------------------- CLASS R1 2/28/07 2006 2005(i) (UNAUDITED) Net asset value, beginning of period $8.09 $8.44 $7.93 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.02) $(0.14) $(0.06) Net realized and unrealized gain (loss) on investments and foreign currency 1.00 (0.21) 0.57(g) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.98 $(0.35) $0.51 - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $9.07 $8.09 $8.44 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 12.11(n) (4.15) 6.43(n) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.23(a) 2.24 2.27(a) Expenses after expense reductions (f) 2.13(a) 2.14 2.27(a) Net investment loss (0.47)(a) (1.57) (1.77)(a) Portfolio turnover 54 122 67 Net assets at end of period (000 Omitted) $669 $430 $210 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued SIX MONTHS YEARS ENDED 8/31 ENDED ----------------------------- CLASS R2 2/28/07 2006 2005(i) (UNAUDITED) Net asset value, beginning of period $8.12 $8.45 $7.93 - ------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.01) $(0.10) $(0.05) Net realized and unrealized gain (loss) on investments and foreign currency 1.01 (0.23) 0.57(g) - ------------------------------------------------------------------------------------------------------------------------- Total from investment operations $1.00 $(0.33) $0.52 - ------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $9.12 $8.12 $8.45 - ------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 12.32(n) (3.91) 6.56(n) - ------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.93(a) 1.93 1.98(a) Expenses after expense reductions (f) 1.78(a) 1.80 1.98(a) Net investment loss (0.20)(a) (1.21) (1.45)(a) Portfolio turnover 54 122 67 Net assets at end of period (000 Omitted) $411 $382 $212 - ------------------------------------------------------------------------------------------------------------------------- SIX MONTHS YEARS ENDED 8/31 ENDED ---------------------------------------------- CLASS R3 2/28/07 2006 2005 2004(i) (UNAUDITED) Net asset value, beginning of period $8.46 $8.79 $7.54 $7.60 - ------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.00)(w) $(0.10) $(0.11) $(0.09) Net realized and unrealized gain (loss) on investments and foreign currency 1.06 (0.23) 1.36 0.03 - ------------------------------------------------------------------------------------------------------------------------- Total from investment operations $1.06 $(0.33) $1.25 $(0.06) - ------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $9.52 $8.46 $8.79 $7.54 - ------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 12.53(n) (3.75) 16.58 (0.79)(b)(n) - ------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.78(a) 1.79 1.80 1.74(a) Expenses after expense reductions (f) 1.68(a) 1.69 1.80 1.74(a) Net investment loss (0.06)(a) (1.10) (1.33) (1.47)(a) Portfolio turnover 54 122 67 94 Net assets at end of period (000 Omitted) $2,441 $2,185 $1,126 $314 - ------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued SIX MONTHS YEARS ENDED 8/31 ENDED ----------------------------- CLASS R4 2/28/07 2006 2005(i) (UNAUDITED) Net asset value, beginning of period $8.57 $8.87 $8.31 - ------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $0.01 $(0.07) $(0.03) Net realized and unrealized gain (loss) on investments and foreign currency 1.07 (0.23) 0.59(g) - ------------------------------------------------------------------------------------------------------------------- Total from investment operations $1.08 $(0.30) $0.56 - ------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $9.65 $8.57 $8.87 - ------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 12.60(n) (3.38) 6.74(n) - ------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.43(a) 1.43 1.45(a) Expenses after expense reductions (f) 1.43(a) 1.43 1.45(a) Net investment income (loss) 0.22(a) (0.79) (0.93)(a) Portfolio turnover 54 122 67 Net assets at end of period (000 Omitted) $1,929 $1,899 $53 - ------------------------------------------------------------------------------------------------------------------- SIX MONTHS YEARS ENDED 8/31 ENDED ----------------------------- CLASS R5 2/28/07 2006 2005(i) (UNAUDITED) Net asset value, beginning of period $8.60 $8.88 $8.31 - ------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $0.02 $(0.05) $(0.02) Net realized and unrealized gain (loss) on investments and foreign currency 1.08 (0.23) 0.59(g) - ------------------------------------------------------------------------------------------------------------------- Total from investment operations $1.10 $(0.28) $0.57 - ------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $9.70 $8.60 $8.88 - ------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 12.79(n) (3.15) 6.86(n) - ------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.13(a) 1.14 1.15(a) Expenses after expense reductions (f) 1.13(a) 1.14 1.15(a) Net investment income (loss) 0.49(a) (0.54) (0.63)(a) Portfolio turnover 54 122 67 Net assets at end of period (000 Omitted) $32,035 $38,641 $53 - ------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued SIX MONTHS YEARS ENDED 8/31 ENDED ------------------------------------------------------------------- CLASS 529A 2/28/07 2006 2005 2004 2003 2002(i) (UNAUDITED) Net asset value, beginning of period $8.49 $8.81 $7.54 $7.40 $5.83 $5.92 - ----------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.00)(w) $(0.10) $(0.10) $(0.11) $(0.07) $(0.00)(w) Net realized and unrealized gain (loss) on investments and foreign currency 1.06 (0.22) 1.37 0.25 1.64 (0.09) - ----------------------------------------------------------------------------------------------------------------------------- Total from investment operations $1.06 $(0.32) $1.27 $0.14 $1.57 $(0.09) - ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $9.55 $8.49 $8.81 $7.54 $7.40 $5.83 - ----------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 12.49(n) (3.63) 16.84 1.89(b) 26.93 (1.52)(n) - ----------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.63(a) 1.64 1.64 1.60 1.73 1.74(a) Expenses after expense reductions (f) 1.63(a) 1.64 1.64 1.60 N/A N/A Net investment loss (0.02)(a) (1.06) (1.18) (1.32) (1.18) (1.22)(a) Portfolio turnover 54 122 67 94 120 147 Net assets at end of period (000 Omitted) $704 $667 $591 $345 $123 $5 - ----------------------------------------------------------------------------------------------------------------------------- SIX MONTHS YEARS ENDED 8/31 ENDED ------------------------------------------------------------------- CLASS 529B 2/28/07 2006 2005 2004 2003 2002(i) (UNAUDITED) Net asset value, beginning of period $8.03 $8.39 $7.23 $7.16 $5.68 $5.76 - ----------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.03) $(0.15) $(0.15) $(0.15) $(0.11) $(0.01) Net realized and unrealized gain (loss) on investments and foreign currency 1.01 (0.21) 1.31 0.22 1.59 (0.07) - ----------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.98 $(0.36) $1.16 $0.07 $1.48 $(0.08) - ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $9.01 $8.03 $8.39 $7.23 $7.16 $5.68 - ----------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 12.20(n) (4.29) 16.04 0.98(b) 26.06 (1.39)(n) - ----------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.28(a) 2.29 2.29 2.25 2.36 2.39(a) Expenses after expense reductions (f) 2.28(a) 2.28 2.29 2.25 N/A N/A Net investment loss (0.65)(a) (1.71) (1.83) (1.97) (1.78) (1.85)(a) Portfolio turnover 54 122 67 94 120 147 Net assets at end of period (000 Omitted) $205 $185 $158 $129 $55 $5 - ----------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued SIX MONTHS YEARS ENDED 8/31 ENDED --------------------------------------------------------------------- CLASS 529C 2/28/07 2006 2005 2004 2003 2002(i) (UNAUDITED) Net asset value, beginning of period $7.85 $8.21 $7.07 $6.99 $5.55 $5.63 - ----------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.02) $(0.14) $(0.14) $(0.15) $(0.10) $(0.01) Net realized and unrealized gain (loss) on investments and foreign currency 0.98 (0.22) 1.28 0.23 1.54 (0.07) - ----------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.96 $(0.36) $1.14 $0.08 $1.44 $(0.08) - ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $8.81 $7.85 $8.21 $7.07 $6.99 $5.55 - ----------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 12.23(n) (4.38) 16.12 1.14(b) 25.95 (1.42)(n) - ----------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions(f) 2.28(a) 2.29 2.29 2.26 2.36 2.39(a) Expenses after expense reductions (f) 2.28(a) 2.29 2.29 2.26 N/A N/A Net investment loss (0.55)(a) (1.71) (1.82) (1.97) (1.78) (1.85)(a) Portfolio turnover 54 122 67 94 120 147 Net assets at end of period (000 Omitted) $255 $350 $329 $183 $86 $5 - ----------------------------------------------------------------------------------------------------------------------------- Any redemption fees charged by the fund during the 2004 and 2005 fiscal years resulted in a per share impact of less than $0.01. (a) Annualized. (b) The fund's net asset value and total return calculation include a non-recurring accrual recorded as a result of an administrative proceeding regarding disclosure of brokerage allocation practices in connection with fund sales. The non-recurring accrual did not have a material impact on the net asset value per share based on the shares outstanding on the day the proceeds were recorded. (d) Per share data are based on average shares outstanding. (f) Ratios do not reflect reductions from fees paid indirectly. (g) The per share amount is not in accordance with the net realized and unrealized gain/loss for the period because of the timing of sales of fund shares and the per share amount of realized and unrealized gains and losses at such time. (i) For the period from the class' inception, July 31, 2002 (Classes 529A, 529B, and 529C), December 31, 2002 (Class R), October 31, 2003 (Class R3) and April 1, 2005 (Classes R1, R2, R4, and R5) through the stated period end. (n) Not annualized. (r) Certain expenses have been reduced without which performance would have been lower. (s) From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. (t) Total returns do not include any applicable sales charges. (w) Per share amount was less than $0.01. SEE NOTES TO FINANCIAL STATEMENTS NOTES TO FINANCIAL STATEMENTS (unaudited) (1) BUSINESS AND ORGANIZATION MFS Mid Cap Growth Fund (the fund) is a series of MFS Series Trust IV (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open- end management investment company. (2) SIGNIFICANT ACCOUNTING POLICIES GENERAL - 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. The fund can invest in foreign securities. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country's legal, political, and economic environment. INVESTMENT VALUATIONS - Equity securities, including restricted equity securities, are generally valued at the last sale or official closing price as reported by an independent pricing service on the market or exchange on which they are primarily traded. For securities for which there were no sales reported that day, equity securities are generally valued at the last quoted daily bid quotation as reported by an independent pricing service on the market or exchange on which they are primarily traded. For securities held short for which there were no sales reported for the day, the position is generally valued at the last quoted daily ask quotation as reported by an independent pricing service on the market or exchange on which such securities are primarily traded. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at their net asset value per share. Securities and other assets generally valued on the basis of information from an independent pricing service may also be valued at a broker-dealer bid quotation. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates reported by an independent pricing service. The Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund's investments (including any fair valuation) to the adviser pursuant to valuation policies and procedures approved by the Board. If the adviser determines that reliable market quotations are not readily available, investments are valued at fair value as determined in good faith by the adviser in accordance with such procedures under the oversight of the Board of Trustees. Under the fund's valuation policies and procedures, market quotations are not considered to be readily available for many types of debt instruments and certain types of derivatives. These investments are generally valued at fair value based on information from independent pricing services. In addition, investments may be valued at fair value if the adviser determines that an investment's value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund's net asset value, or after the halting of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur on a frequent basis after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund's net asset value may be deemed to have a material affect on the value of securities traded in foreign markets. Accordingly, the fund's foreign equity securities may often be valued at fair value. The adviser may rely on independent pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund's net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of investments used to determine the fund's net asset value may differ from quoted or published prices for the same investments. In September 2006, FASB Statement No. 157, Fair Value Measurements (the "Statement") was issued, and is effective for fiscal years beginning after November 15, 2007 and for all interim periods within those fiscal years. This Statement provides a single definition of fair value, a hierarchy for measuring fair value and expanded disclosures about fair value measurements. Management is evaluating the application of the Statement to the fund, and believes the impact will be limited to expanded disclosures resulting from the adoption of this Statement in the fund's financial statements. REPURCHASE AGREEMENTS - The fund may enter into repurchase agreements with institutions that the fund's investment adviser has determined are creditworthy. Each repurchase agreement is recorded at cost. The fund requires that the securities collateral in a repurchase transaction be transferred to the custodian in a manner sufficient to enable the fund to obtain those securities in the event of a default under the repurchase agreement. The fund monitors, on a daily basis, the value of the collateral to ensure that its value, including accrued interest, is greater than amounts owed to the fund under each such repurchase agreement. The fund and other funds managed by Massachusetts Financial Services Company (MFS), may utilize a joint trading account for the purpose of entering into one or more repurchase agreements. FOREIGN CURRENCY TRANSLATION - Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed. SECURITY LOANS - State Street Bank and Trust Company ("State Street"), as lending agent, may loan the securities of the fund to certain qualified institutions (the "Borrowers") approved by the fund. The loans are collateralized at all times by cash and/or U.S. Treasury securities in an amount at least equal to the market value of the securities loaned. State Street provides the fund with indemnification against Borrower default. The fund bears the risk of loss with respect to the investment of cash collateral. On loans collateralized by cash, the cash collateral is invested in a money market fund or short-term securities. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent. On loans collateralized by U.S. Treasury securities, a fee is received from the Borrower, and is allocated between the fund and the lending agent. Net income from securities lending is included in interest income on the Statement of Operations. The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income. INDEMNIFICATIONS - Under the fund's organizational documents, its officers and trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred. INVESTMENT TRANSACTIONS AND INCOME - Investment transactions are recorded on the trade date. Interest income is recorded on the accrual basis. All premium and discount is amortized or accreted for financial statement purposes in accordance with U.S. generally accepted accounting principles. All discount is accreted for tax reporting purposes as required by federal income tax regulations. Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex- dividend date. Dividend and interest payments received in additional securities are recorded on the ex-dividend or ex-interest date in an amount equal to the value of the security on such date. The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving its portfolio holdings are reflected in realized gain/loss in the Statement of Operations, or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations. FEES PAID INDIRECTLY - The fund's custody fee is reduced according to an arrangement that measures the value of cash deposited with the custodian by the fund. This amount, for the six months ended February 28, 2007, is shown as a reduction of total expenses on the Statement of Operations. TAX MATTERS AND DISTRIBUTIONS - The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. Accordingly, no provision for federal income tax is required in the financial statements. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements. Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Book/tax differences primarily relate to net operating losses and wash sale loss deferrals. The fund declared no distributions for the year ended August 31, 2006. The federal tax cost and the tax basis components of distributable earnings were as follows: AS OF 2/28/07 Cost of investments $1,306,777,887 ----------------------------------------------------------- Gross appreciation $ 174,611,698 Gross depreciation (34,297,257) ----------------------------------------------------------- Net unrealized appreciation (depreciation) $ 140,314,441 AS OF 8/31/06 Capital loss carryforwards $(1,224,519,822) Other temporary differences (92,593) Net unrealized appreciation (depreciation) 18,620,513 The aggregate cost above includes prior fiscal year end tax adjustments. As of August 31, 2006, the fund had capital loss carryforwards available to offset future realized gains. Such losses expire as follows: 8/31/11 $(1,224,519,822) In June 2006, FASB Interpretation No. 48, Accounting for Uncertainty in Income Taxes (the "Interpretation") was issued, and is effective for fiscal years beginning after December 15, 2006 and is to be applied to all open tax years as of the effective date. On December 22, 2006, the SEC delayed the implementation of the Interpretation for regulated investment companies for an additional six months. This Interpretation prescribes a minimum threshold for financial statement recognition of the benefit of a tax position taken or expected to be taken in a tax return, and requires certain expanded disclosures. Management is evaluating the application of the Interpretation to the fund, and has not at this time determined the impact, if any, resulting from the adoption of this Interpretation on the fund's financial statements. MULTIPLE CLASSES OF SHARES OF BENEFICIAL INTEREST - The fund offers multiple classes of shares, which differ in their respective distribution and service fees. All shareholders bear the common expenses of the fund based on daily net assets of each class, without distinction between share classes. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B and Class 529B shares will convert to Class A and Class 529A shares, respectively, approximately eight years after purchase. (3) TRANSACTIONS WITH AFFILIATES INVESTMENT ADVISER - The fund has an investment advisory agreement with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.75% of the fund's average daily net assets. The investment adviser has agreed in writing to reduce its management fee to 0.70% of average daily net assets in excess of $3.0 billion. This written agreement may be rescinded only upon consent of the fund's Board of Trustees. For the six month ended February 28, 2007, the fund's average daily net assets did not exceed $3.0 billion and therefore, the management fee was not reduced. DISTRIBUTOR - MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $15,685 and $128 for the six months ended February 28, 2007, as its portion of the initial sales charge on sales of Class A and Class 529A shares of the fund, respectively. The Board of Trustees has adopted a distribution plan for certain class shares pursuant to Rule 12b-1 of the Investment Company Act of 1940. The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. Distribution Fee Plan Table: TOTAL ANNUAL DISTRIBUTION DISTRIBUTION SERVICE DISTRIBUTION EFFECTIVE AND SERVICE FEE RATE FEE RATE PLAN(d) RATE(e) FEE Class A 0.10% 0.25% 0.35% 0.25% $590,823 Class B 0.75% 0.25% 1.00% 1.00% 1,312,751 Class C 0.75% 0.25% 1.00% 1.00% 384,652 Class R 0.25% 0.25% 0.50% 0.50% 13,510 Class R1 0.50% 0.25% 0.75% 0.75% 2,246 Class R2 0.25% 0.25% 0.50% 0.50% 1,004 Class R3 0.25% 0.25% 0.50% 0.50% 5,700 Class R4 -- 0.25% 0.25% 0.25% 2,533 Class 529A 0.25% 0.25% 0.50% 0.35% 1,194 Class 529B 0.75% 0.25% 1.00% 1.00% 984 Class 529C 0.75% 0.25% 1.00% 1.00% 1,549 - --------------------------------------------------------------------------------------------------------------------- Total Distribution and Service Fees $2,316,946 (d) In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees up to these annual percentage rates of each class' average daily net assets. (e) The annual effective rates represent actual fees incurred under the distribution plan for the six months ended February 28, 2007 based on each class' average daily net assets. Payment of the 0.10% annual Class A distribution fee is not yet in effect and will be implemented on such date as the fund's Board of Trustees may determine. 0.10% of the Class 529A distribution fee is currently being paid by the fund. Payment of the remaining 0.15% of the Class 529A distribution fee is not yet in effect and will be implemented on such date as the fund's Board of Trustees may determine. Certain Class A, Class C and Class 529C shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within 12 months of purchase. Class B and Class 529B shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within six years of purchase. All contingent deferred sales charges are paid to MFD and during the six months ended February 28, 2007, were as follows: AMOUNT Class A $12,083 Class B $265,069 Class C $4,241 Class 529B $-- Class 529C $-- The fund has entered into and may from time to time enter into contracts with program managers and other parties which administer the tuition programs through which an investment in the fund's 529 share classes is made. The fund has entered into an agreement with MFD pursuant to which MFD receives an annual fee of up to 0.35% of the average daily net assets attributable to each 529 share class. The fee is based on average daily net assets and is currently established at 0.25% annually of average daily net assets of the fund's 529 share classes. The fee may only be increased with the approval of the Board of Trustees who oversees the fund. The services provided by MFD, or a third party with which MFD contracts, include recordkeeping and tax reporting and account services, as well as services designed to maintain the program's compliance with the Internal Revenue Code and other regulatory requirements. Program manager fees for the six months ended February 28, 2007, were as follows: AMOUNT Class 529A $853 Class 529B 246 Class 529C 387 -------------------------------------------------- Total Program Manager Fees $1,486 SHAREHOLDER SERVICING AGENT - MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average daily net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the six months ended February 28, 2007, the fee was $533,286, which equated to 0.0765% annually of the fund's average daily net assets. Effective January 1, 2007, MFSC has entered into a sub-accounting agreement with SunLife Retirement Services (U.S.), Inc. (SRS), an affiliate of MFSC, on behalf of the fund to provide omnibus account services to the fund. MFSC pays SRS both an asset based fee and a per account charge of the assets held in the omnibus account. The fund then reimburses MFSC for the sub- accounting fees paid to SRS. For the six months ended February 28, 2007, the sub-accounting fee for SRS was $52,381, which equated to 0.0075% annually of the fund's average daily net assets. MFSC also receives payment from the fund for out-of-pocket and sub-accounting expenses. For the six months ended February 28, 2007, these out-of-pocket and sub-accounting costs amounted to $618,520. The fund may also pay shareholder servicing related costs directly to non-related parties. ADMINISTRATOR - MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund. Under an administrative services agreement, the fund partially reimburses MFS the costs incurred to provide these services. The fund is charged a fixed amount plus a fee based on calendar year average net assets. The fund's annual fixed amount is $17,500. The administrative services fee incurred for the six months ended February 28, 2007 was equivalent to an annual effective rate of 0.0179% of the fund's average daily net assets. In addition to the administrative services provided by MFS to the fund as described above, MFS is responsible for providing certain retirement plan administration and services with respect to certain shares. These services include various administrative, recordkeeping, and communication/educational services with respect to the retirement plans which invest in these shares, and may be provided directly by MFS or by a third party. MFS may subsequently pay all, or a portion, of the retirement plan administration and services fee to affiliated or unaffiliated third parties. For the six months ended February 28, 2007, the fund paid MFS an annual retirement plan administration and services fee up to the following annual percentage rates of each class' average daily net assets: ANNUAL EFFECTIVE TOTAL FEE RATE RATE(g) AMOUNT Class R1 0.45% 0.35% $1,348 Class R2 0.40% 0.25% 803 Class R3 0.25% 0.15% 2,850 Class R4 0.15% 0.15% 1,520 Class R5 0.10% 0.10% 19,186 - ------------------------------------------------------------------------------- Total Retirement Plan Administration and Services Fees $25,707 (g) MFS has agreed in writing to waive a portion of the retirement plan administration and services fee equal to 0.10% for Class R1 shares, 0.15% for Class R2 shares, and 0.10% for Class R3 shares. This agreement will continue until at least September 30, 2008. For the six months ended February 28, 2007, this waiver amounted to $1,741 and is reflected as a reduction of total expenses in the Statement of Operations. TRUSTEES' AND OFFICERS' COMPENSATION - The fund pays compensation to independent trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. The fund does not pay compensation directly to trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration for their services to the fund from MFS. Certain officers and trustees of the fund are officers or directors of MFS, MFD, and MFSC. The fund has an unfunded, defined benefit plan for certain retired independent trustees which resulted in a pension expense of $1,059. The fund also has an unfunded retirement benefit deferral plan for certain independent trustees which resulted in an expense of $9,565. Both amounts are included in independent trustees' compensation for the six months ended February 28, 2007. The liability for deferred retirement benefits payable to certain independent trustees under both plans amounted to $102,140 at February 28, 2007, and is included in payable for independent trustees' compensation. OTHER - This fund and certain other MFS funds (the funds) have entered into a services agreement (the Agreement) which provides for payment of fees by the funds to Tarantino LLC in return for the provision of services of an Independent Chief Compliance Officer (ICCO) for the funds. The ICCO is an officer of the funds and the sole member of Tarantino LLC. The funds can terminate the Agreement with Tarantino LLC at any time under the terms of the Agreement. For the six months ended February 28, 2007, the fee paid to Tarantino LLC was $5,600. MFS has agreed to reimburse the fund for a portion of the payments made by the funds to Tarantino LLC in the amount of $3,706, which is shown as a reduction of total expenses in the Statement of Operations. Additionally, MFS has agreed to bear all expenses associated with office space, other administrative support, and supplies provided to the ICCO. (4) PORTFOLIO SECURITIES Purchases and sales of investments, other than U.S. government securities, purchased option transactions, and short-term obligations, aggregated $747,478,341 and $958,005,704, respectively. (5) SHARES OF BENEFICIAL INTEREST The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows: SIX MONTHS ENDED YEAR ENDED 2/28/07 8/31/06 SHARES AMOUNT SHARES AMOUNT Shares sold Class A 4,127,538 $38,211,574 15,088,929 $138,168,791 Class B 664,264 5,784,702 2,453,745 21,453,852 Class C 263,481 2,248,329 884,134 7,518,002 Class I 2,956,555 27,159,289 13,143,555 121,415,368 Class R 53,167 488,274 185,895 1,686,929 Class R1 83,506 746,158 53,385 457,017 Class R2 46,264 422,605 47,689 403,252 Class R3 268,654 2,605,970 220,731 1,939,319 Class R4 198,579 1,881,730 266,034 2,548,219 Class R5 288,042 2,657,907 5,245,943 45,341,084 Class 529A 3,561 33,317 20,626 185,820 Class 529B 1,658 14,128 4,539 38,888 Class 529C 2,169 18,925 8,503 73,287 - ---------------------------------------------------------------------------------------------------------- 8,957,438 $82,272,908 37,623,708 $341,229,828 Shares reacquired Class A (19,834,928) $(183,221,884) (59,944,257) $(549,759,400) Class B (7,071,901) (61,814,165) (14,461,937) (125,061,771) Class C (2,269,866) (19,305,606) (4,752,877) (40,330,365) Class I (1,208,786) (11,472,139) (1,834,256) (16,811,569) Class R (240,853) (2,188,138) (945,490) (8,534,962) Class R1 (62,951) (574,771) (25,160) (220,287) Class R2 (48,271) (439,997) (25,756) (212,893) Class R3 (270,386) (2,616,772) (90,702) (830,890) Class R4 (220,269) (2,090,005) (50,448) (473,965) Class R5 (1,477,990) (14,075,089) (758,209) (6,954,615) Class 529A (8,425) (76,284) (9,124) (80,205) Class 529B (1,992) (17,094) (341) (2,921) Class 529C (17,787) (152,185) (3,987) (33,921) - ----------------------------------------------------------------------------------------------------------- (32,734,405) $(298,044,129) (82,902,544) $(749,307,764) Net change Class A (15,707,390) $(145,010,310) (44,855,328) $(411,590,609) Class B (6,407,637) (56,029,463) (12,008,192) (103,607,919) Class C (2,006,385) (17,057,277) (3,868,743) (32,812,363) Class I 1,747,769 15,687,150 11,309,299 104,603,799 Class R (187,686) (1,699,864) (759,595) (6,848,033) Class R1 20,555 171,387 28,225 236,730 Class R2 (2,007) (17,392) 21,933 190,359 Class R3 (1,732) (10,802) 130,029 1,108,429 Class R4 (21,690) (208,275) 215,586 2,074,254 Class R5 (1,189,948) (11,417,182) 4,487,734 38,386,469 Class 529A (4,864) (42,967) 11,502 105,615 Class 529B (334) (2,966) 4,198 35,967 Class 529C (15,618) (133,260) 4,516 39,366 - ---------------------------------------------------------------------------------------------------------- (23,776,967) $(215,771,221) (45,278,836) $(408,077,936) The fund is one of several mutual funds in which the MFS funds-of-funds may invest. The MFS funds-of-funds do not invest in the underlying MFS funds for the purpose of exercising management or control. At the end of the period, the MFS Growth Allocation Fund, MFS Aggressive Growth Allocation Fund and MFS Moderate Allocation Fund were the owners of record of approximately 19%, 14% and 8%, respectively, of the value of outstanding voting shares. In addition, the MFS Lifetime 2020 Fund, the MFS Lifetime 2030 Fund and the MFS Lifetime 2040 Fund were each the owners of record of less than 1% of the value of outstanding voting shares. (6) LINE OF CREDIT The fund and other funds managed by MFS participate in a $1 billion unsecured committed line of credit provided by a syndication of banks under a credit agreement. In addition, the fund and other funds managed by MFS have established uncommitted borrowing arrangements with certain banks. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the Federal Reserve funds rate plus 0.35%. In addition, a commitment fee, based on the average daily, unused portion of the committed line of credit, is allocated among the participating funds at the end of each calendar quarter. For the six months ended February 28, 2007, the fund's commitment fee and interest expense were $4,687 and $2,331, respectively, and are included in miscellaneous expense on the Statement of Operations. BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT A discussion regarding the Board's most recent review and renewal of the Fund's investment advisory agreement is available by clicking on the fund's name under "Select a fund" on the MFS Web site (mfs.com). PROXY VOTING POLICIES AND INFORMATION A general description of the MFS funds' proxy voting policies and procedures is available without charge, upon request, by calling 1-800-225-2606, by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available without charge by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. QUARTERLY PORTFOLIO DISCLOSURE The fund will file a complete schedule of portfolio holdings with the Securities and Exchange Commission (the Commission) for the first and third quarters of each fiscal year on Form N-Q. The fund's Form N-Q may be reviewed and copied at the: Public Reference Room Securities and Exchange Commission 100 F Street, NE, Room 1580 Washington, D.C. 20549 Information on the operation of the Public Reference Room may be obtained by calling the Commission at 1-202-551-5850. The fund's Form N-Q is available on the EDGAR database on the Commission's Internet Web site at http://www.sec.gov, and copies of this information may be obtained, upon payment of a duplicating fee, by electronic request at the following e-mail address: publicinfo@sec.gov or by writing the Public Reference Section at the above address. A shareholder can also obtain the quarterly portfolio holdings report at mfs.com. CONTACT US WEB SITE MAILING ADDRESS mfs.com MFS Service Center, Inc. P.O. Box 55824 MFS TALK Boston, MA 1-800-637-8255 02205-5824 24 hours a day OVERNIGHT MAIL ACCOUNT SERVICE AND MFS Service Center, Inc. LITERATURE 500 Boylston Street Boston, MA 02116-3741 SHAREHOLDERS 1-800-225-2606 8 a.m. to 8 p.m. ET INVESTMENT PROFESSIONALS 1-800-343-2829 8 a.m. to 8 p.m. ET RETIREMENT PLAN SERVICES 1-800-637-1255 8 a.m. to 8 p.m. ET - ------------------------------------------------------------------------------- Go paperless with eDELIVERY: Arrange to have MFS send prospectuses, reports, and proxies directly to your e-mail inbox. You'll get timely information and less clutter in your mailbox (not to mention help your fund save printing and postage costs). SIGN UP: If your account is registered with us, simply go to mfs.com, log in to your account via MFS Access, and select the eDelivery sign up options. If you own your MFS fund shares through a financial institution or a retirement plan, MFS TALK, MFS Access, and eDelivery may not be available to you. - ------------------------------------------------------------------------------- M F S(R) INVESTMENT MANAGEMENT M F S(R) INVESTMENT MANAGEMENT [graphic omitted] SEMIANNUAL REPORT MFS(R) MUNICIPAL BOND FUND LETTER FROM THE CEO 1 - ------------------------------------------------------------- PORTFOLIO COMPOSITION 2 - ------------------------------------------------------------- EXPENSE TABLE 3 - ------------------------------------------------------------- PORTFOLIO OF INVESTMENTS 5 - ------------------------------------------------------------- STATEMENT OF ASSETS AND LIABILITIES 26 - ------------------------------------------------------------- STATEMENT OF OPERATIONS 28 - ------------------------------------------------------------- STATEMENTS OF CHANGES IN NET ASSETS 29 - ------------------------------------------------------------- FINANCIAL HIGHLIGHTS 30 - ------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 32 - ------------------------------------------------------------- BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT 41 - ------------------------------------------------------------- PROXY VOTING POLICIES AND INFORMATION 41 - ------------------------------------------------------------- QUARTERLY PORTFOLIO DISCLOSURE 41 - ------------------------------------------------------------- CONTACT INFORMATION BACK COVER - ------------------------------------------------------------- THE REPORT IS PREPARED FOR THE GENERAL INFORMATION OF SHAREHOLDERS. IT IS AUTHORIZED FOR DISTRIBUTION TO PROSPECTIVE INVESTORS ONLY WHEN PRECEDED OR ACCOMPANIED BY A CURRENT PROSPECTUS. - ------------------------------------------------------------------------------ NOT FDIC INSURED o MAY LOSE VALUE o NO BANK OR CREDIT UNION GUARANTEE o NOT A DEPOSIT o NOT INSURED BY ANY FEDERAL GOVERNMENT AGENCY OR NCUA/NCUSIF - ------------------------------------------------------------------------------ 2/28/07 MMB-SEM LETTER FROM THE CEO Dear Shareholders: [Photo of Robert J. Manning] The past year has been a great example of why investors should keep their eyes on the long term. In 2006 the Dow Jones Industrial Average returned 19%. In February 2007 it hit its all-time high of 12,787. Less than a week later, stocks sold off around the globe. By March 5 the Dow was off 5.8%. That is a sign of volatile markets and a reason investors should make sure they have an investment plan that can ride out the peaks and troughs. If you are focused on a long-term investment strategy, the short-term ups and downs of the markets should not necessarily dictate portfolio action on your part. Both the bond and stock markets are inherently cyclical. In our view, investors who remain committed to a long-term plan are more likely to achieve their financial goals. We believe you should not let the headlines guide you in your investment decisions and that there is no sense in reacting to short- term volatility. In any market environment, we believe individual investors are best served by following a three-pronged investment strategy of allocating their holdings across the major asset classes, diversifying within each class, and regularly rebalancing their portfolios to maintain their desired allocations. Of course, these strategies cannot guarantee a profit or protect against a loss. Investing and planning for the long term require diligence and patience, two traits that in our experience are essential to capitalizing on the many opportunities the financial markets can offer -- through both up and down economic cycles. Respectfully, /s/ Robert J. Manning Robert J. Manning Chief Executive Officer and Chief Investment Officer MFS Investment Management(R) April 16, 2007 The opinions expressed in this letter are subject to change, may not be relied upon for investment advice, and no forecasts can be guaranteed. PORTFOLIO COMPOSITION PORTFOLIO STRUCTURE (i) Bonds 105.6% Cash & Other Net Assets (5.6)% TOP FIVE INDUSTRIES (i) Healthcare Revenue - Hospitals 17.1% ------------------------------------------------ General Obligations - General Purpose 13.0% ------------------------------------------------ Utilities - Municipal Owned 12.8% ------------------------------------------------ General Obligations - Schools 9.8% ------------------------------------------------ State & Local Agencies 9.6% ------------------------------------------------ CREDIT QUALITY OF BONDS (r) AAA 59.3% ------------------------------------------------ A 17.3% ------------------------------------------------ AA 12.6% ------------------------------------------------ BBB 10.3% ------------------------------------------------ BB 0.3% ------------------------------------------------ Not Rated 0.2% ------------------------------------------------ PORTFOLIO FACTS Average Duration (d)(i) 5.8 ------------------------------------------------ Average Life (i)(m) 13.8 yrs. ------------------------------------------------ Average Maturity (i)(m) 15.5 yrs. ------------------------------------------------ Average Credit Quality of Rated Securities (long-term) (a) AA ------------------------------------------------ Average Credit Quality of Rated Securities (short-term) (a) A-1 ------------------------------------------------ (a) The average credit quality of rated securities is based upon a market weighted average of portfolio holdings that are rated by public rating agencies. (d) Duration is a measure of how much a bond's price is likely to fluctuate with general changes in interest rates, e.g., if rates rise 1.00%, a bond with a 5- year duration is likely to lose about 5.00% of its value. (i) For purposes of this presentation, the bond component includes both accrued interest amounts and the equivalent exposure from any derivative holdings, if applicable. (m) The average maturity shown is calculated using the final stated maturity on the portfolio's holdings without taking into account any holdings which have been pre-refunded or pre-paid to an earlier date or which have a mandatory put date prior to the stated maturity. The average life shown takes into account these earlier dates. (r) Each security is assigned a rating from Moody's Investors Service. If not rated by Moody's, the rating will be that assigned by Standard & Poor's. Likewise, if not assigned a rating by Standard & Poor's, it will be based on the rating assigned by Fitch, Inc. For those portfolios that hold a security which is not rated by any of the three agencies, the security is considered Not Rated. Holdings in U.S. Treasuries and government agency mortgage-backed securities, if any, are included in the "AAA"-rating category. Percentages are based on the total market value of investments as of 2/28/07. From time to time "Cash & Other Net Assets" may be negative due to timing of cash receipts and/or equivalent exposure from any derivative holdings. Percentages are based on net assets as of 2/28/07, unless otherwise noted. The portfolio is actively managed and current holdings may be different. EXPENSE TABLE Fund expenses borne by the shareholders during the period, September 1, 2006 through February 28, 2007 As a shareholder of the fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments and redemption fees on certain exchanges and redemptions, and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period September 1, 2006 through February 28, 2007. ACTUAL EXPENSES The first line for each share class in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES The second line for each share class in the following table provides information about hypothetical account values and hypothetical expenses based on the fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption fees. Therefore, the second line for each share class in the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher. Expense table - continued - -------------------------------------------------------------------------------- Expenses Paid During Annualized Beginning Ending Period(p) Share Expense Account Value Account Value 9/01/06- Class Ratio 9/01/06 2/28/07 2/28/07 - -------------------------------------------------------------------------------- Actual 0.72% $1,000.00 $1,026.30 $3.62 A ------------------------------------------------------------------------ Hypothetical (h) 0.72% $1,000.00 $1,021.22 $3.61 - -------------------------------------------------------------------------------- Actual 1.48% $1,000.00 $1,022.40 $7.42 B ------------------------------------------------------------------------- Hypothetical (h) 1.48% $1,000.00 $1,017.46 $7.40 - -------------------------------------------------------------------------------- (h) 5% class return per year before expenses. (p) Expenses paid is equal to each class' annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by the number of days in the period, divided by the number of days in the year. Expenses paid do not include any applicable sales charges (loads) or redemption fees. If these transaction costs had been included, your costs would have been higher. PORTFOLIO OF INVESTMENTS 2/28/07 (unaudited) The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Municipal Bonds - 104.4% - ---------------------------------------------------------------------------------------------------------- ISSUER SHARES/PAR VALUE ($) - ---------------------------------------------------------------------------------------------------------- Airport & Port Revenue - 3.1% - ---------------------------------------------------------------------------------------------------------- Chicago, IL, O'Hare International Airport Rev., XLCA, 6%, 2029 (u) $ 6,000,000 $ 6,698,490 Chicago, IL, O'Hare International Airport Rev. (Second Lien Passenger Facility D), AMBAC, 5.5%, 2019 1,845,000 1,974,888 Chicago, IL, O'Hare International Airport Rev. (Third Lien Passenger Facility B), FSA, 5.75%, 2022 1,125,000 1,242,878 Chicago, IL, O'Hare International Airport Rev. (Third Lien Passenger Facility B), FSA, 5.75%, 2022 (u) 5,000,000 5,523,900 Chicago, IL, O'Hare International Airport Rev., Third Lien, "A", MBIA, 5%, 2029 3,395,000 3,632,073 Denver, CO, City & County Airport Rev., AMBAC, 6%, 2017 (u) 5,000,000 5,363,000 Indianapolis, IN, Local Public Improvement (Airport Authority Project), "I", MBIA, 5%, 2034 700,000 731,269 Massachusetts Port Authority Rev., "C", 6.125%, 2010 (c) 1,500,000 1,612,575 Massachusetts Port Authority Rev., ETM, 13%, 2013 (c) 2,725,000 3,567,761 New York, NY, City Industrial Development Agency, Special Facilities Rev. (Terminal One Group), 5.5%, 2024 680,000 741,424 Niagara, NY, Frontier Transportation Authority Rev. (Buffalo- Niagara International Airport), MBIA, 5.875%, 2013 1,485,000 1,562,576 -------------- $ 32,650,834 - ---------------------------------------------------------------------------------------------------------- General Obligations - General Purpose - 12.8% - ---------------------------------------------------------------------------------------------------------- Chicago, IL, FGIC, 6.125%, 2010 (c) $ 3,785,000 $ 4,112,667 Chicago, IL, AMBAC, 5.5%, 2018 (u) 11,800,000 13,317,244 Chicago, IL (Lakefront Millennium Parking Facilities), MBIA, 5.7%, 2012 (c) 2,355,000 2,607,244 Commonwealth of Massachusetts, 5.375%, 2011 (c)(u) 5,740,000 6,166,999 Commonwealth of Massachusetts, "B", ETM, FGIC, 7%, 2009 (c) 7,000,000 7,281,120 Commonwealth of Massachusetts, ETM, 6.5%, 2008 (c) 6,245,000 6,472,443 Commonwealth of Puerto Rico, XLCA, 5.5%, 2017 (u) 2,300,000 2,633,270 Commonwealth of Puerto Rico, Public Improvement, "A", 5.25%, 2027 800,000 872,576 Country Club Hills, IL, "N", MBIA, 5%, 2031 2,460,000 2,632,594 Cranston, RI, FGIC, 6.375%, 2009 (c) 830,000 896,126 Delaware County, OH, 6.25%, 2010 (c) 1,000,000 1,099,870 Detroit/Wayne County, MI, Stadium Authority, FGIC, 5.5%, 2017 6,000,000 6,128,820 Houston County, AL, AMBAC, 6.25%, 2009 (c) 3,315,000 3,592,300 Interlocken Metropolitan District, CO, Improvement, "C", XLCA, 0%, 2027 1,860,000 591,908 New York, NY, FGIC, 5.75%, 2007 (c) 8,500,000 8,697,455 New York, NY, Urban Development Corp., 5.5%, 2008 (c) 1,325,000 1,358,364 New York, NY, Urban Development Corp., 5.5%, 2016 13,365,000 13,574,430 Pittsfield, MA, MBIA, 5.5%, 2017 100,000 109,040 Schaumburg, IL, "B", FGIC, 5.25%, 2034 2,000,000 2,177,360 Southlake, TX, AMBAC, 0%, 2009 (c) 1,835,000 956,677 Southlake, TX, AMBAC, 0%, 2009 (c) 3,150,000 1,339,443 State of California, 5.5%, 2009 (c)(u) 11,650,000 12,324,652 State of California, XLCA, 5.75%, 2009 (c)(u) 10,230,000 10,916,126 State of California, 5.5%, 2013 5,000,000 5,482,450 State of California, XLCA, 5.75%, 2017 (u) 1,115,000 1,189,783 State of California, XLCA, 5.75%, 2017 (u) 2,405,000 2,566,303 State of California, 5.1%, 2034 5,000,000 5,113,600 State of Illinois, MBIA, 5.5%, 2025 390,000 407,889 State of Washington, 6.75%, 2010 3,880,000 4,201,885 State of Washington, 6%, 2012 4,360,000 4,828,962 -------------- $ 133,649,600 - ---------------------------------------------------------------------------------------------------------- General Obligations - Improvement - 3.1% - ---------------------------------------------------------------------------------------------------------- Birmingham, AL, "B", 5.75%, 2009 (c) $ 910,000 $ 959,668 Birmingham, AL, "B", 5.75%, 2009 (c) 90,000 94,952 District of Columbia, MBIA, 6.5%, 2010 3,095,000 3,357,023 District of Columbia, ETM, MBIA, 6.5%, 2010 (c) 2,905,000 3,158,316 Massachusetts Bay Transportation Authority, General Transportation Systems, "A", XLCA, 7%, 2021 10,185,000 12,726,565 Massachusetts Bay Transportation Authority, General Transportation Systems, "C", XLCA, 6.1%, 2013 10,200,000 11,527,530 -------------- $ 31,824,054 - ---------------------------------------------------------------------------------------------------------- General Obligations - Schools - 9.8% - ---------------------------------------------------------------------------------------------------------- Adams 12 Five Star Schools, CO, "B", FGIC, 0%, 2025 $ 1,700,000 $ 707,846 Chicago, IL, Board of Education, MBIA, 6.25%, 2009 5,160,000 5,385,750 Chicago, IL, Board of Education, MBIA, 6.25%, 2015 20,295,000 22,953,442 Chicago, IL, Board of Education, AMBAC, 5.4%, 2017 3,000,000 3,093,480 Chicago, IL, Board of Education, FGIC, 5.25%, 2019 (u) 10,000,000 11,344,600 Clark County, NV, School District, "A", MBIA, 7%, 2010 4,000,000 4,394,000 De Soto, TX, Independent School District, School Building, PSF, 0%, 2031 1,345,000 401,509 De Soto, TX, Independent School District, School Building, PSF, 0%, 2034 1,015,000 256,876 De Soto, TX, Independent School District, School Building, PSF, 0%, 2036 1,250,000 283,688 Ennis, TX, Independent School District, Capital Appreciation, "N", PSF, 0%, 2028 705,000 248,421 Ennis, TX, Independent School District, Capital Appreciation, "N", PSF, 0%, 2029 1,350,000 461,660 Ennis, TX, Independent School District, Capital Appreciation, "N", PSF, 0%, 2031 1,340,000 401,893 Ferris, TX, Independent School District, PSF, 5.5%, 2034 2,360,000 2,539,974 Florida Board of Education, Capital Outlay, 9.125%, 2014 1,735,000 2,066,836 Florida Board of Education, Capital Outlay, ETM, 9.125%, 2014 (c) 265,000 348,456 Forsyth County, GA, School District, 6%, 2010 (c) 865,000 936,345 Gilroy, CA, Unified School District, FGIC, 5%, 2027 1,000,000 1,060,040 Grand Blanc, MI, Community Schools (School Building & Site), FSA, 5%, 2028 1,000,000 1,064,840 Irving, TX, Independent School District, Capital Appreciation, PSF, 0%, 2026 2,505,000 995,888 Kane Cook & Dupage Counties, IL, FSA, 6.375%, 2011 (c) 1,245,000 1,365,865 Kane Cook & Dupage Counties, IL, FSA, 6.5%, 2011 (c) 1,345,000 1,481,518 Knox County, KY, XLCA, 5.625%, 2014 (c) 1,150,000 1,300,202 Lancaster, TX, Independent School District, "N", FSA, 4.5%, 2028 3,755,000 3,782,412 Lancaster, TX, Independent School District, "N", FSA, 4.5%, 2030 1,020,000 1,025,947 Lancaster, TX, Independent School District, Capital Appreciation, FSA, 0%, 2014 (c) 1,765,000 656,121 Lancaster, TX, Independent School District, Capital Appreciation, FSA, 0%, 2014 (c) 1,570,000 548,794 Lancaster, TX, Independent School District, Capital Appreciation, FSA, 0%, 2025 970,000 412,260 Lancaster, TX, Independent School District, Capital Appreciation, FSA, 0%, 2026 970,000 390,571 Lane County, OR, School District, 6.25%, 2010 (c) 1,150,000 1,241,874 Lane County, OR, School District, 6.25%, 2010 (c) 1,000,000 1,079,890 Leander, TX, Independent School District, PSF, 0%, 2018 4,885,000 2,541,470 Leander, TX, Independent School District, Capital Appreciation, Refunding, School Building, FGIC, 0%, 2026 3,280,000 1,259,290 Leander, TX, Independent School District, Capital Appreciation, Refunding, School Building, FGIC, 0%, 2031 3,320,000 950,184 Leander, TX, Independent School District, Capital Appreciation, Refunding, School Building, "N", PSF, 0%, 2029 4,000,000 1,281,080 Manchester, NH, School Facilities Rev., MBIA, 5.5%, 2027 785,000 948,484 Manchester, NH, School Facilities Rev., MBIA, 5.5%, 2028 785,000 952,386 Palos Verdes Peninsula, CA, Capital Appreciation, "N", FSA, 0%, 2029 3,885,000 1,472,765 Prosper, TX, Independent School District, Capital Appreciation School Building, "N", PSF, 0%, 2031 1,760,000 513,814 Rancho Santiago, CA, Community College District, Election of 2002, MBIA, 5%, 2013 (c) 2,200,000 2,383,436 Rockwall, TX, Independent School District, Unrefunded, Capital Appreciation, "N", PSF, 0%, 2014 90,000 62,877 San Marcos, TX, Independent School District, PSF, 5.625%, 2014 (c) 2,000,000 2,251,460 San Marcos, TX, Independent School District, PSF, 5.625%, 2014 (c) 2,000,000 2,251,460 San Rafael, CA, Elementary School District, Election of 1999, MBIA, 5%, 2028 2,500,000 2,634,025 Schertz-Cibolo-Universal City, TX, Independent School District, Capital Appreciation, School Building, "A", PSF, 0%, 2027 2,050,000 789,312 Schertz-Cibolo-Universal City, TX, Independent School District, Capital Appreciation, School Building, "A", PSF, 0%, 2029 775,000 268,290 Schertz-Cibolo-Universal City, TX, Independent School District, Capital Appreciation, School Building, "A", PSF, 0%, 2030 1,130,000 370,380 Sunnyvale, TX, Independent School District, PSF, 5.25%, 2028 1,900,000 2,048,694 Sunnyvale, TX, Independent School District, PSF, 5.25%, 2031 2,000,000 2,152,740 Wylie, TX, Independent School District, PSF, 5.25%, 2029 3,955,000 4,212,550 -------------- $ 101,575,695 - ---------------------------------------------------------------------------------------------------------- Healthcare Revenue - Hospitals - 16.9% - ---------------------------------------------------------------------------------------------------------- Akron Bath Copley, OH, Hospital Rev. (Children's Hospital), FSA, 5.25%, 2025 $ 1,000,000 $ 1,073,930 Baxter County, AR, Hospital Rev., 5.375%, 2014 1,000,000 1,030,830 Baxter County, AR, Hospital Rev., 5.6%, 2021 1,750,000 1,810,253 Colorado Health Facilities Authority Rev. (Portercare Adventist Health Systems), 6.625%, 2011 (c) 1,250,000 1,419,575 Denver, CO, Health & Hospital Authority Rev., "A", 5.375%, 2028 2,440,000 2,476,039 District of Columbia, Hospital Rev. (Medlantic Healthcare), ETM, MBIA, 5.25%, 2019 (c) 6,750,000 6,927,323 Elkhart County, IN, Hospital Authority Rev. (Elkhart General Hospital, Inc.), 5.25%, 2018 1,000,000 1,031,450 Elkhart County, IN, Hospital Authority Rev. (Elkhart General Hospital, Inc.), 5.25%, 2020 4,345,000 4,443,936 Florence County, SC, Hospital Rev. (McLeod Regional Medical Center), "A", FSA, 5.25%, 2034 5,000,000 5,398,150 Gainesville & Hall County, GA, Hospital Authority Rev. (Northeast Georgia Health System, Inc.), 5.5%, 2031 1,555,000 1,627,028 Gulfport, MS, Hospital Facilities Rev. (Memorial Hospital), 5.75%, 2031 1,575,000 1,638,268 Harris County, TX, Health Facilities Development Corp. "A" (Texas Children's Hospital), 5.375%, 2015 4,300,000 4,499,047 Harris County, TX, Health Facilities Development Corp. Hospital Rev. (Memorial Herman Healthcare), 6.375%, 2011 (c) 2,000,000 2,229,260 Highlands County, FL, Health Facilities Authority Rev. (Adventist Health Systems), "C", 5.25%, 2036 1,620,000 1,736,867 Highlands County, FL, Health Facilities Authority Rev. (Adventist/Sunbelt Hospital), 6%, 2011 (c) 1,000,000 1,108,920 Huntsville, AL, Health Care Authority Rev., 5.625%, 2026 2,595,000 2,736,038 Illinois Development Finance Authority Rev. "A" (Provena Health), MBIA, 5.25%, 2012 1,600,000 1,641,104 Illinois Educational Facilities Authority Rev. (Centegra Health Systems), 5.25%, 2024 5,500,000 5,637,390 Illinois Health Facilities Authority Rev. (Advocate Health Care Network), 6.375%, 2010 (c) 1,800,000 1,969,920 Illinois Health Facilities Authority Rev. (Condell Medical Center), 6.35%, 2015 6,500,000 6,913,920 Illinois Health Facilities Authority Rev. (Decatur Memorial Hospital), 5.75%, 2024 2,650,000 2,822,568 Illinois Health Facilities Authority Rev. (Passavant Memorial Area Hospital Associates), 6%, 2010 (c) 1,165,000 1,256,359 Illinois Health Facilities Authority Rev. (Riverside Health Systems), 5.75%, 2012 (c) 1,975,000 2,185,318 Illinois Health Facilities Authority Rev. (Sinai Health), FHA, 5.15%, 2037 2,400,000 2,535,816 Illinois Health Facilities Authority Rev., "A" (Advocate Health), MBIA, 5.7%, 2011 660,000 678,368 Indiana Health Facilities Financing Authority, Hospital Rev. (Clarian Health), "A", 5%, 2039 910,000 944,535 Indiana Health Facilities Financing Authority, Hospital Rev. (Community Hospital Project), "N", AMBAC, 5%, 2025 5,980,000 6,353,870 Indiana Health Facilities Financing Authority, Hospital Rev. (Deaconess Hospital) "A", AMBAC, 5.375%, 2034 2,075,000 2,248,761 Iowa Finance Authority, Health Care Facilities Rev. (Genesis Medical Center), 6.125%, 2016 2,195,000 2,342,131 Kentucky Economic Development Finance Authority (Norton Healthcare), "A", 6.5%, 2010 (c) 1,865,000 2,059,818 Kentucky Economic Development Finance Authority, Unrefunded (Norton Healthcare), "A", 6.5%, 2020 2,885,000 3,128,754 Knox County, TN, Health Educational Hospital & Housing Facilities Board Rev. (Covenant Health), "A", 0%, 2035 2,475,000 630,110 Knox County, TN, Health Educational Hospital & Housing Facilities Board Rev. (Covenant Health), "A", 0%, 2036 1,550,000 374,511 Knox County, TN, Health Educational Hospital & Housing Facilities Board Rev. (Covenant Health), "A", 0%, 2037 1,060,000 243,016 Marion County, FL, Hospital District Rev. (Monroe Hospital), 5.625%, 2019 2,610,000 2,721,212 Marshall County, AL, Health Care "A", 5.75%, 2015 1,000,000 1,078,320 Martin County, FL, Health Facilities (Martin Memorial Medical Center) "B", 5.875%, 2032 2,200,000 2,362,800 Maryland Health & Higher Educational Facilities Authority Rev. (Medstar Health), 5.5%, 2033 1,115,000 1,190,653 Maryland Health & Higher Educational Facilities Authority Rev. (University of Maryland Medical System), 6.75%, 2010 (c) 1,000,000 1,105,300 Massachusetts Health & Educational Facilities Authority Rev. (Caritas Christi), "A", 5.7%, 2015 2,550,000 2,649,476 Massachusetts Health & Educational Facilities Authority Rev. (Partners Healthcare Systems), "C", 5.75%, 2021 1,500,000 1,629,480 Michigan Hospital Finance Authority Rev. (Mercy Mount Clemens), MBIA, 5.75%, 2017 2,900,000 3,039,490 Michigan Hospital Finance Authority Rev. (Sisters of Mercy Health System), ETM, MBIA, 5.375%, 2014 (c) 515,000 544,128 Michigan Hospital Finance Authority Rev., "A" (Crittenton), 5.625%, 2027 1,000,000 1,074,930 Monroe County, MI, Hospital Finance Authority, Hospital Rev. (Mercy Memorial Hospital Corp.), 5.5%, 2035 2,325,000 2,453,526 Monroe County, PA, Hospital Authority Rev. (Pocono Medical Center), 6%, 2043 750,000 809,468 Montgomery, AL, Medical Clinic Board Health Care Facility Rev. (Jackson Hospital & Clinic), 5.25%, 2031 440,000 463,509 Mount Lebanon, PA, Hospital Authority Rev. (St. Clair Memorial Hospital), 5.625%, 2032 1,335,000 1,415,661 New Hampshire Health & Education Facilities Rev. (Exeter Hospital), 6%, 2016 1,000,000 1,098,160 New Jersey Health Care Facilities, Financing Authority Rev. (Saint Barnabas Health) Capital Appreciation, "B", 0%, 2036 10,610,000 2,441,892 New Jersey Health Care Facilities, Financing Authority Rev. (Saint Barnabas Health) Capital Appreciation, "B", 0%, 2037 7,070,000 1,542,533 North Central, TX, Health Facilities Development Corp. Rev. (Texas Health Resources System), MBIA, 5%, 2017 5,000,000 5,145,400 North Texas Health Facilities Development Corp. Rev. (United Regional Health Care System, Inc.), 6%, 2023 4,000,000 4,357,840 Orange County, FL, Health Facilities Authority Hospital Rev. (Adventist Health Systems), 5.625%, 2012 (c) 1,490,000 1,647,255 Orange County, FL, Health Facilities Authority Hospital Rev (Orlando Regional Healthcare), 5.75%, 2012 (c) 2,230,000 2,469,145 Peninsula Ports Authority, VA, Hospital Facility Rev. (Whittaker Memorial), FHA, 8.7%, 2023 1,520,000 1,744,610 Pennsylvania Higher Educational Facilities Authority, Health Services Rev. (Allegheny Delaware Valley), MBIA, 5.875%, 2016 5,000,000 5,107,100 Rhode Island Health & Educational Building Corp., Hospital Financing (Lifespan Obligated Group), "A", FSA, 5%, 2032 3,945,000 4,186,513 Rhode Island Health & Educational Building Corp., Hospital Financing (Lifespan Obligated Group), 6.375%, 2012 (c) 1,730,000 1,959,917 Rhode Island Health & Educational Building Corp., Hospital Financing (Lifespan Obligated Group), 6.375%, 2021 270,000 300,807 Richland County, OH, Hospital Facilities Rev. (Medcentral Health), "B", 6.375%, 2010 (c) 665,000 733,116 Richland County, OH, Hospital Facilities Rev. (Medcentral Health), "B", 6.375%, 2022 335,000 364,343 Royston, GA, Hospital Authority Rev. (Ty Cobb Healthcare Systems, Inc.), 6.7%, 2016 770,000 803,387 Shelby County, TN, Educational & Hospital Facilities Board Hospital Rev., Refunded Balance (Methodist Healthcare), 6.375%, 2012 (c) 1,255,000 1,423,045 Shelby County, TN, Educational & Housing Facilities Board Hospital Rev. (Methodist Healthcare), 6.375%, 2012 (c) 745,000 844,756 South Carolina Jobs & Economic Development Authority Rev. (Bon Secours Health Systems, Inc.), "A", 5.625%, 2030 2,055,000 2,190,034 South Carolina Medical University, Hospital Facilities Rev., "A", MBIA, 5%, 2031 970,000 1,023,593 Steubenville, OH, Hospital Rev. (Trinity Hospital), 6.375%, 2020 1,200,000 1,307,292 Tallahassee, FL, Health Facilities Rev. (Tallahassee Memorial Healthcare), 6.25%, 2020 2,000,000 2,120,460 Tarrant County, TX, Health Facilities Development Corp. (Texas Health Resources), MBIA, 5.25%, 2018 8,605,000 8,874,939 West Shore, PA, Hospital Authority Rev. (Holy Spirit Hospital), 6.2%, 2026 1,250,000 1,340,538 Wichita, KS, Hospital Authority Rev. (Via Christi Health System), 6.25%, 2019 1,595,000 1,766,845 Wichita, KS, Hospital Authority Rev. (Via Christi Health System), 6.25%, 2020 2,465,000 2,729,470 Wisconsin Health & Educational Facilities Authority Rev. (Agnesian Healthcare, Inc.), 6%, 2017 520,000 554,284 Wisconsin Health & Educational Facilities Authority Rev. (Agnesian Healthcare, Inc.), 6%, 2021 650,000 688,383 Wisconsin Health & Educational Facilities Authority Rev. (Aurora Health Care, Inc.), 6.875%, 2030 2,000,000 2,306,560 Wisconsin Health & Educational Facilities Authority Rev. (Wheaton Franciscan Healthcare), 5.25%, 2031 3,425,000 3,631,596 Wisconsin Health & Educational Facilities Authority Rev. (Wheaton Franciscan Services), 5.75%, 2012 (c) 3,000,000 3,306,240 -------------- $ 175,701,189 - ---------------------------------------------------------------------------------------------------------- Healthcare Revenue - Long Term Care - 0.3% - ---------------------------------------------------------------------------------------------------------- Bell County, TX, Health Facilities Development Corp. Rev. (Buckner Retirement Facility), 5.25%, 2019 $ 2,500,000 $ 2,550,000 Iowa Finance Authority, Health Care Facilities Rev. (Care Initiatives Project), "A", 5.5%, 2025 930,000 972,510 -------------- $ 3,522,510 - ---------------------------------------------------------------------------------------------------------- Industrial Revenue - Chemicals - 0.4% - ---------------------------------------------------------------------------------------------------------- Brazos River, TX, Harbor Navigation District (Dow Chemical Co.), 5.7%, 2033 $ 3,500,000 $ 3,734,080 - ---------------------------------------------------------------------------------------------------------- Industrial Revenue - Environmental Services - 0.7% - ---------------------------------------------------------------------------------------------------------- California Pollution Control Financing Authority, Solid Waste Disposal Rev. (Waste Management, Inc.), "A-2", 5.4%, 2025 $ 785,000 $ 841,960 California Pollution Control Financing Authority, Solid Waste Disposal Rev. (Waste Management, Inc.), "B", 5%, 2027 920,000 956,782 Colorado Housing & Finance Authority, Solid Waste Rev. (Waste Management, Inc.), 5.7%, 2018 1,730,000 1,910,854 Gulf Coast Waste Disposal Authority, TX (Waste Management of Texas), "A", 5.2%, 2028 665,000 700,923 Nevada Department of Business & Industry Rev. (Republic Services, Inc.), 5.625%, 2026 1,500,000 1,646,070 New Hampshire Business Finance Authority, Solid Waste Disposal Rev. (Waste Management, Inc.), 5.2%, 2027 665,000 697,864 -------------- $ 6,754,453 - ---------------------------------------------------------------------------------------------------------- Industrial Revenue - Other - 1.4% - ---------------------------------------------------------------------------------------------------------- Massachusetts Development Finance Agency Rev., Resource Recovery (Flour Corp.), 5.625%, 2019 $ 8,650,000 $ 9,046,949 Memphis-Shelby County, TN (FedEx Corp.), 5.05%, 2012 1,400,000 1,472,506 Port Corpus Christi, TX, Nueces County General Rev. (Union Pacific Corp.), 5.35%, 2010 670,000 672,312 Tooele County, UT, Hazardous Waste Treatment Rev. (Union Pacific Corp.), 5.7%, 2026 3,640,000 3,788,112 -------------- $ 14,979,879 - ---------------------------------------------------------------------------------------------------------- Industrial Revenue - Paper - 0.6% - ---------------------------------------------------------------------------------------------------------- Delta County, MI, Economic Development Corp., Environmental Improvements Rev. (Mead Westvaco Escanaba), "A", 6.25%, 2012 (c) $ 1,500,000 $ 1,675,830 Georgetown County, SC, Environmental Improvement (International Paper Co.), 5.7%, 2014 1,400,000 1,528,184 Jay, ME, Solid Waste Disposal Rev., "A" (International Paper Co.), 5.125%, 2018 1,500,000 1,537,275 Sabine River Authority Rev., Louisiana Water Facilities (International Paper Co.), 6.2%, 2025 1,250,000 1,350,225 -------------- $ 6,091,514 - ---------------------------------------------------------------------------------------------------------- Miscellaneous Revenue - Other - 0.4% - ---------------------------------------------------------------------------------------------------------- Baltimore, MD, Convention Center Hotel Rev., "A", XLCA, 5.25%, 2039 $ 1,945,000 $ 2,122,559 Gallery Certificate Trust, PA, Parking Rev., 4.5%, 2013 (n) 2,125,000 2,125,276 -------------- $ 4,247,835 - ---------------------------------------------------------------------------------------------------------- Multi-Family Housing Revenue - 1.1% - ---------------------------------------------------------------------------------------------------------- Bay County, FL, Housing Finance Authority, Multi-Family Rev. (Andrews Place II Apartments), FSA, 5%, 2035 $ 395,000 $ 406,791 Bay County, FL, Housing Finance Authority, Multi-Family Rev. (Andrews Place II Apartments), FSA, 5.1%, 2046 995,000 1,023,915 California Statewide Communities Development Authority Rev. (Irvine Apartments), 5.25%, 2025 3,500,000 3,602,620 Indianapolis, IN, Multi-Family Rev. (Cambridge Station Apartments II), FNMA, 5.25%, 2039 1,145,000 1,189,140 Michigan Housing Development Authority, GNMA, 5.2%, 2038 1,200,000 1,241,652 Newark, NJ, Housing Authority (Port Authority - Newark Marine Terminal), MBIA, 5.5%, 2014 (c) 785,000 870,958 Seattle, WA, Housing Authority Rev., Capped Fund Program (High Rise Rehab), "I", FSA, 5%, 2025 1,630,000 1,672,510 Tampa, FL, Housing Finance Authority, Multi-Family Rev. (Meridian River Development Corp.), 4.75%, 2026 1,130,000 1,159,041 -------------- $ 11,166,627 - ---------------------------------------------------------------------------------------------------------- Parking - 0.1% - ---------------------------------------------------------------------------------------------------------- Rail Connections, Inc., MA Rev., "B", 0%, 2009 (c) $ 375,000 $ 241,061 Rail Connections, Inc., MA Rev., "B", 0%, 2009 (c) 450,000 270,671 Rail Connections, Inc., MA Rev., "B", 0%, 2009 (c) 975,000 548,360 -------------- $ 1,060,092 - ---------------------------------------------------------------------------------------------------------- Sales & Excise Tax Revenue - 2.8% - ---------------------------------------------------------------------------------------------------------- Illinois Sales Tax Rev., 0%, 2009 $ 8,965,000 $ 8,191,679 Illinois Sales Tax Rev., 6.5%, 2022 5,000,000 6,089,450 Metropolitan Atlanta, GA, Rapid Transit Authority Rev., 6.25%, 2018 4,580,000 5,277,809 Metropolitan Pier & Expo, IL, McCormick Place Expansion, MBIA, 5.25%, 2042 3,120,000 3,324,422 Miami Dade County, FL, Transportation Systems, "N", XLCA, 5%, 2022 3,870,000 4,177,859 Wyandotte County-Kansas City, KS, Unified Government Rev. (Sales Tax Second Lien Area B), 5%, 2020 2,165,000 2,252,964 -------------- $ 29,314,183 - ---------------------------------------------------------------------------------------------------------- Single Family Housing - Local - 4.3% - ---------------------------------------------------------------------------------------------------------- Calcasieu Parish, LA, Public Trust Authority, Single Family Mortgage Rev., "A", GNMA, 6.05%, 2032 $ 1,600,000 $ 1,709,216 California Rural Home Mortgage Finance Authority Rev., GNMA, 6.55%, 2030 345,000 355,233 California Rural Home Mortgage Finance Authority Rev., GNMA, 7.3%, 2031 45,000 45,190 California Rural Home Mortgage Finance Authority Rev., "A", GNMA, 5.75%, 2044 760,000 819,645 Chicago, IL, Single Family Mortgage Rev., "A", GNMA, 5.5%, 2043 2,500,000 2,695,750 Chicago, IL, Single Family Mortgage Rev., "B", GNMA, 6%, 2033 575,000 592,158 Chicago, IL, Single Family Mortgage Rev., "C", GNMA, 7.05%, 2030 30,000 30,604 Chicago, IL, Single Family Mortgage Rev., "C", GNMA, 7%, 2032 80,000 80,801 Chicago, IL, Single Family Mortgage Rev., "N", GNMA, 5.75%, 2042 4,000,000 4,389,160 Denver, CO, Single Family Mortgage Rev., GNMA, 7.3%, 2031 85,000 85,609 Escambia County, FL, Single Family Housing Rev., GNMA, 6.95%, 2024 225,000 225,657 Jefferson Parish, LA, Single Family Mortgage Rev., "B-1", GNMA, 6.625%, 2023 385,000 408,489 Jefferson Parish, LA, Single Family Mortgage Rev., "B-1", GNMA, 6.75%, 2030 525,000 531,710 Jefferson Parish, LA, Single Family Mortgage Rev., "D-1", GNMA, 7.5%, 2026 125,000 129,213 Lee County, FL, Housing Finance Authority Rev. (Multi-County Program), "A-4", GNMA, 7%, 2031 50,000 50,028 Lubbock, TX, Housing Finance Corp. Rev., GNMA, 6.1%, 2030 1,330,000 1,344,391 Manatee County, FL, Housing Finance Mortgage Rev., Single Family, Sub Series 3, GNMA, 6.5%, 2023 100,000 101,387 Manatee County, FL, Housing Finance Mortgage Rev., Single Family, Sub Series 3, GNMA, 5.3%, 2028 665,000 684,172 Manatee County, FL, Housing Finance Mortgage Rev., Single Family, Sub Series 3, GNMA, 5.4%, 2029 230,000 239,324 Maricopa County, AZ, Single Family Mortgage Rev., "B", GNMA, 6.2%, 2034 115,000 115,883 Nortex Housing Finance Corp., TX, Single Family Mortgage Backed Securities Rev., "A", GNMA, 5.5%, 2038 2,715,000 2,906,760 Permian Basin Housing Finance Corp., TX, Single Family Mortgage Backed Securities (Mortgage Backed Project) "A", GNMA, 5.65%, 2038 1,825,000 1,954,174 Pima County, AZ, Industrial Development Authority Rev., "B-1", GNMA, 7.05%, 2030 245,000 249,638 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "A", GNMA, 6.45%, 2029 325,000 326,700 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "A", GNMA, 5.9%, 2035 785,000 851,152 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "A", GNMA, 6.25%, 2035 360,000 385,686 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "A", GNMA, 5.8%, 2036 2,115,000 2,341,072 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "A-1", GNMA, 6.875%, 2026 190,000 191,163 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "A-1", GNMA, 5.75%, 2037 660,000 725,314 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "A-3", GNMA, 6%, 2035 1,180,000 1,295,947 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "A-3", GNMA, 5.5%, 2037 1,155,000 1,241,348 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "A-5", GNMA, 5.8%, 2027 985,000 1,037,609 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "A-5", GNMA, 5.7%, 2036 2,110,000 2,317,582 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "A-5", GNMA, 5.9%, 2037 500,000 551,895 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "A-6", GNMA, 5.65%, 2036 1,590,000 1,665,891 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "B", GNMA, 5.45%, 2027 1,145,000 1,195,300 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "B-2", GNMA, 6.45%, 2033 915,000 969,086 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "B-3", GNMA, 5.25%, 2038 1,545,000 1,644,683 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "B-4", GNMA, 5.55%, 2038 1,540,000 1,684,360 Sedgwick & Shawnee Counties, KS, Single Family Housing Rev., "N", GNMA, 5.45%, 2038 4,820,000 5,161,497 St. Tammany Parish, LA, Single Family Mortgage Rev. (Home Ownership Program), "A", GNMA, 5.25%, 2039 1,200,000 1,281,048 -------------- $ 44,611,525 - ---------------------------------------------------------------------------------------------------------- Single Family Housing - State - 3.6% - ---------------------------------------------------------------------------------------------------------- Arkansas Development Finance Authority Rev., Mortgage Backed Securities Program, "B", GNMA, 4.45%, 2034 $ 945,000 $ 945,000 California Housing Finance Agency Rev., Home Mortgage, FSA, 0%, 2019 7,470,000 3,524,122 California Housing Finance Agency Rev., Home Mortgage, MBIA, 0%, 2028 1,285,000 430,436 Colorado Housing & Finance Authority Rev., 6.05%, 2016 235,000 240,595 Colorado Housing & Finance Authority Rev., 7.45%, 2016 135,000 135,678 Colorado Housing & Finance Authority Rev., 6.8%, 2030 285,000 285,516 Colorado Housing & Finance Authority Rev., 7.25%, 2031 270,000 275,567 Colorado Housing & Finance Authority Rev., "A-1", 7.4%, 2027 45,000 45,803 Colorado Housing & Finance Authority Rev., "A-2", 7.15%, 2014 14,000 14,282 Colorado Housing & Finance Authority Rev., "A-2", AMBAC, 6.6%, 2028 805,000 848,188 Colorado Housing & Finance Authority Rev., "B-3", 6.55%, 2025 79,000 81,130 Colorado Housing & Finance Authority Rev., "C", 6.75%, 2021 145,000 148,387 Colorado Housing & Finance Authority Rev., "C-2", 5.9%, 2023 545,000 563,759 Colorado Housing & Finance Authority Rev., "C-2", FHA, 6.6%, 2032 475,000 508,934 Colorado Housing & Finance Authority Rev., "C-2", 8.4%, 2021 115,000 118,517 Delaware Housing Authority Rev. (Single Family), "C", 6.25%, 2037 2,000,000 2,172,460 Louisiana Housing Finance Agency, Single Family Mortgage Rev., GNMA, 6.4%, 2032 330,000 330,333 Louisiana Housing Finance Agency, Single Family Mortgage Rev., GNMA, 6.375%, 2033 620,000 620,775 Louisiana Housing Finance Agency, Single Family Mortgage Rev., "B-2", GNMA, 7.55%, 2031 190,000 193,215 Minnesota Housing Finance Agency Rev., Residential Housing Finance, "B", 4.8%, 2023 745,000 752,182 Mississippi Home Corp. Rev., Single Family Rev., "A", GNMA, 6.1%, 2034 2,305,000 2,371,315 Mississippi Home Corp. Rev., Single Family Rev., "F", GNMA, 7.55%, 2027 211,000 222,495 Missouri Housing Development Commission, Single Family Mortgage Rev. (Home Loan Program), GNMA, 7.45%, 2031 115,000 119,176 Missouri Housing Development Commission, Single Family Mortgage Rev. (Home Loan Program), GNMA, 6.85%, 2032 250,000 255,188 Missouri Housing Development Commission, Single Family Mortgage Rev. (Home Loan Program), GNMA, 6.75%, 2034 300,000 314,580 Missouri Housing Development Commission, Single Family Mortgage Rev. (Home Loan Program), "B", GNMA, 6.7%, 2030 695,000 707,434 New Hampshire Housing Finance Authority Rev., 6.85%, 2030 610,000 636,773 New Hampshire Housing Finance Authority Rev., "B", 5.875%, 2030 315,000 315,186 New Hampshire Housing Finance Authority Rev., "B", 6.3%, 2031 245,000 252,960 New Mexico Mortgage Finance Authority Rev., GNMA, 7.1%, 2030 205,000 206,384 New Mexico Mortgage Finance Authority Rev., GNMA, 6.8%, 2031 575,000 575,000 New Mexico Mortgage Finance Authority Rev., GNMA, 6.25%, 2032 1,040,000 1,071,855 New Mexico Mortgage Finance Authority Rev., "B-2", GNMA, 6.35%, 2033 540,000 552,760 New Mexico Mortgage Finance Authority Rev., "I", GNMA, 5.75%, 2038 2,000,000 2,164,540 New Mexico Mortgage Finance Authority Rev., "N", GNMA, 5.95%, 2037 1,535,000 1,651,829 North Dakota Housing Finance Agency Rev., Housing Finance, "A", 5%, 2033 1,015,000 1,015,132 Ohio Housing Finance Agency Mortgage Rev., Residential Mortgage Backed, "C", GNMA, 5.9%, 2035 1,455,000 1,517,376 Oklahoma County Home Finance Mortgage Backed, "N", GNMA, 5.4%, 2038 1,935,000 2,061,104 Oklahoma Housing Finance Agency Rev., 6.8%, 2016 145,000 147,591 Oregon Health & Community Services (Single Family Mortgage), "B", 6.25%, 2031 2,500,000 2,715,800 Texas Housing & Community Affairs, Residential Mortgage Rev., GNMA, 7.1%, 2021 4,120,000 4,248,544 Vermont Housing Finance Agency Rev., FSA, 4.95%, 2032 1,460,000 1,463,592 Washington Housing Finance Commission Rev., Single Family Housing, GNMA, 5%, 2023 455,000 460,069 -------------- $ 37,281,562 - ---------------------------------------------------------------------------------------------------------- Solid Waste Revenue - 0.4% - ---------------------------------------------------------------------------------------------------------- Central Wayne County, MI, Sanitation Rev., "VII", 4.75%, 2007 $ 500,000 $ 499,905 Delaware County, PA, Industrial Development Authority, Resource Recovery Facilities Rev. (American Ref-Fuel Co.), "A", 6.2%, 2019 1,250,000 1,293,963 Massachusetts Development Finance Agency, Resource Recovery Rev. (Ogden Haverhill Associates), "A", 6.7%, 2014 2,400,000 2,602,872 -------------- $ 4,396,740 - ---------------------------------------------------------------------------------------------------------- State & Agency - Other - 1.4% - ---------------------------------------------------------------------------------------------------------- Kentucky Property & Buildings Commission Rev., 5.85%, 2010 (c) $ 4,000,000 $ 4,241,480 Kentucky Property & Buildings Commission Rev., 5.9%, 2010 (c) 4,500,000 4,777,830 New York Dormitory Authority Rev. (City University), 5.75%, 2013 5,000,000 5,411,100 -------------- $ 14,430,410 - ---------------------------------------------------------------------------------------------------------- State & Local Agencies - 9.5% - ---------------------------------------------------------------------------------------------------------- Alabama Building Renovation Authority, AMBAC, 6%, 2015 $ 1,610,000 $ 1,724,262 Alabama Building Renovation Authority, AMBAC, 6%, 2016 1,705,000 1,825,168 Allen County, IN, Jail Building Corp., First Mortgage, 5.75%, 2011 (c) 2,750,000 2,990,350 Delaware Valley, PA, Regional Finance Authority, RITES, AMBAC, 7.477%, 2018 (p) 16,250,000 20,171,775 Fayette County, GA (Criminal Justice Center), 6.25%, 2010 (c) 1,000,000 1,088,530 Golden State, CA, Tobacco Securitization Corp., Tobacco Settlement Rev., "A", FSA, 0% to 2010, 4.55% to 2022 3,415,000 3,019,372 Golden State, CA, Tobacco Securitization Corp., Tobacco Settlement Rev., "A-1", AMBAC, 0% to 2010, 4.6% to 2023 995,000 880,038 Golden State, CA, Tobacco Securitization Corp., Tobacco Settlement Rev., Enhanced, "A", 5%, 2045 2,150,000 2,235,506 Golden State, CA, Tobacco Securitization Corp., Tobacco Settlement Rev., Enhanced, "B", 5.375%, 2010 (c) 4,000,000 4,210,000 Golden State, CA, Tobacco Securitization Corp., Tobacco Settlement Rev., Enhanced, "B", 5.5%, 2013 (c) 3,925,000 4,322,053 New York Dormitory Authority Rev., Mental Health Services Facilities, "A", 5.75%, 2010 605,000 618,056 Palm Springs, CA, Finance Lease Rev. (Convention Center), "A", MBIA, 5.5%, 2035 7,000,000 7,888,650 Pennsylvania Convention Center Authority Rev., ETM, FGIC, 6.7%, 2016 (c) 26,195,000 30,048,285 Philadelphia, PA, Municipal Authority, MBIA, 5.4%, 2017 5,000,000 5,106,450 San Bernardino, CA, Joint Powers Financing Authority Lease Rev. (California Department of Transportation), 5.5%, 2014 10,000,000 10,141,800 West Valley City, Utah Municipal Building Lease Rev., "A", AMBAC, 5.5%, 2012 (c) 2,000,000 2,180,980 -------------- $ 98,451,275 - ---------------------------------------------------------------------------------------------------------- Student Loan Revenue - 0.5% - ---------------------------------------------------------------------------------------------------------- Arizona Student Loan Acquisition Authority Rev., 5.8%, 2016 $ 2,500,000 $ 2,651,300 Arizona Student Loan Acquisition Authority Rev., 5.85%, 2017 2,800,000 2,972,200 -------------- $ 5,623,500 - ---------------------------------------------------------------------------------------------------------- Tax - Other - 1.0% - ---------------------------------------------------------------------------------------------------------- Illinois Dedicated Tax Rev. (Civic Center), AMBAC, 6.25%, 2011 $ 3,640,000 $ 3,904,009 New Jersey Economic Development Authority Rev. Cigarette Tax, 5.5%, 2024 910,000 953,298 New Jersey Economic Development Authority Rev. Cigarette Tax, 5.75%, 2029 1,640,000 1,788,289 New Jersey Economic Development Authority Rev. Cigarette Tax, 5.5%, 2031 730,000 782,341 New Jersey Economic Development Authority Rev. Cigarette Tax, 5.75%, 2034 1,095,000 1,186,881 Virgin Islands Public Finance Authority Rev., "A", 5.5%, 2022 2,000,000 2,065,860 -------------- $ 10,680,678 - ---------------------------------------------------------------------------------------------------------- Tax Assessment - 0.2% - ---------------------------------------------------------------------------------------------------------- Noblesville, IN, Redevelopment Authority Lease Rental, 5.25%, 2025 $ 1,545,000 $ 1,662,451 - ---------------------------------------------------------------------------------------------------------- Tobacco - 2.0% - ---------------------------------------------------------------------------------------------------------- Badger, WI, Tobacco Asset Securitization Corp., 6.125%, 2027 $ 2,015,000 $ 2,155,869 California County, CA, Tobacco Securitization Agency, Capital Appreciation Asset Backed (Gold Country), 0%, 2033 5,660,000 1,270,670 Children's Trust Fund, Tobacco Settlement Rev., Puerto Rico, "A", 0%, 2050 10,000,000 691,900 District of Columbia, Tobacco Settlement, 6.25%, 2024 955,000 1,017,342 District of Columbia, Tobacco Settlement, Capital Appreciation, "A", 0%, 2046 7,515,000 710,468 Golden State, CA, Tobacco Securitization Corp., Tobacco Settlement, "A-1", 6.25%, 2033 2,800,000 3,143,896 Iowa Tobacco Settlement Authority, Tobacco Settlement Rev., Asset Backed, "B", 0% to 2007, 5.6% to 2034 2,455,000 2,491,457 Louisiana Tobacco Settlement Authority Rev., 5.5%, 2030 1,235,000 1,301,974 New Jersey Tobacco Settlement Financing Corp., "1-A", 5%, 2041 1,650,000 1,615,977 New Jersey Tobacco Settlement Authority, 5.75%, 2012 (c) 2,275,000 2,438,937 Northern Tobacco Securitization Corp., AK, Asset Backed, "A", 5%, 2046 1,545,000 1,523,834 Silicon Valley Tobacco Securitization Authority, CA, Tobacco Settlement Rev. (Turbo-Santa Clara), "A", 0%, 2036 3,370,000 672,585 Silicon Valley Tobacco Securitization Authority, CA, Tobacco Settlement Rev. (Turbo-Santa Clara), "A", 0%, 2041 2,775,000 412,254 South Carolina Tobacco Settlement Authority Rev., "B", 6.375%, 2028 1,500,000 1,607,940 Washington Tobacco Settlement Authority, 6.5%, 2026 155,000 169,992 -------------- $ 21,225,095 - ---------------------------------------------------------------------------------------------------------- Toll Roads - 1.9% - ---------------------------------------------------------------------------------------------------------- E-470 Public Highway Authority Rev., Capital Appreciation "B", MBIA, 0%, 2010 (c) $ 5,000,000 $ 2,868,650 Harris County, TX, Toll Road Subordinated Lien, 5%, 2024 3,860,000 3,918,440 New Jersey Turnpike Authority Rev., MBIA, 5.375%, 2010 (c)(u) 10,000,000 10,466,300 Northwest Parkway Public Highway Authority Co. Rev., Capital Appreciation "B", AMBAC, 0%, 2018 1,250,000 722,200 Northwest Parkway Public Highway Authority Co. Rev., Capital Appreciation "B", AMBAC, 0%, 2019 2,000,000 1,085,080 Northwest Parkway Public Highway Authority Co. Rev., Capital Appreciation "C", FSA, 0% to 2011, 5.35% to 2016 1,000,000 903,830 -------------- $ 19,964,500 - ---------------------------------------------------------------------------------------------------------- Transportation - Special Tax - 4.4% - ---------------------------------------------------------------------------------------------------------- Jacksonville, FL, Transportation Authority, ETM, 9.2%, 2015 (c) $ 2,000,000 $ 2,536,380 Metropolitan, NY, Transportation Authority Rev., AMBAC, 5%, 2030 5,000,000 5,251,950 Metropolitan, NY, Transportation Authority Rev., "A", FSA, 5%, 2030 2,750,000 2,897,235 Metropolitan, NY, Transportation Authority Rev., ETM, 5.75%, 2013 (c) 5,600,000 6,008,184 New Jersey Economic Development Authority Rev., Transportation Project Sublease "A", FSA, 6%, 2009 (c) 1,325,000 1,390,309 New Jersey Transportation Trust Fund Authority Rev., FSA, 5.5%, 2011 (u) 15,000,000 16,185,150 New Jersey Transportation Trust Fund Authority Rev., Transportation Systems "B", 5.25%, 2007 (c) 8,500,000 8,707,145 New York Thruway Authority Service Contract Rev., 5.25%, 2013 2,420,000 2,470,989 -------------- $ 45,447,342 - ---------------------------------------------------------------------------------------------------------- Universities - Colleges - 5.6% - ---------------------------------------------------------------------------------------------------------- Anderson, IN, Economic Development Rev. (Anderson University Project), 5%, 2028 $ 580,000 $ 590,962 Anderson, IN, Economic Development Rev. (Anderson University Project), 5%, 2032 400,000 405,956 Arkansas Technical University Rev., Housing Systems, "N", AMBAC, 5%, 2036 575,000 611,547 College of Charleston, SC, Academic & Administrative Facilities Rev., "B", XLCA, 5.125%, 2034 2,400,000 2,570,928 Illinois Finance Authority Rev. (University of Chicago), "A", 5%, 2034 785,000 828,238 Los Angeles, CA, Community College, "B", FSA, 5%, 2027 5,000,000 5,300,200 Massachusetts Development Finance Agency Rev. (Boston University), XLCA, 6%, 2059 4,975,000 6,281,584 Massachusetts Development Finance Agency Rev. (Massachusetts College of Pharmacy), "B", 6.625%, 2010 (c) 350,000 381,115 Massachusetts Health & Educational Facilities Authority Rev. (Harvard University), 6.25%, 2020 (u) 16,820,000 21,093,626 Ohio Higher Educational Facilities Rev. (Mt. Union College Project), 5%, 2031 700,000 739,788 Ohio State University, 6%, 2009 (c) 500,000 535,265 Oregon Facilities Authority Rev. (Linfield College), "A", 5%, 2030 605,000 630,229 Rhode Island, Health & Educational Building Corp. (Rhode Island School of Design), "D", XLCA, 5.5%, 2035 9,140,000 10,120,356 San Mateo County, CA (Community College District, 2005 Election), "A", MBIA, 0%, 2026 5,100,000 2,217,276 University of Akron, OH, General Receipts, FGIC, 6%, 2010 (c) 1,000,000 1,072,280 University of Arkansas, University Construction Rev. (UAMS Campus), "B", MBIA, 5%, 2034 810,000 860,180 University of Hawaii, University Systems Rev., "A", FGIC, 5.5%, 2012 (c) 3,500,000 3,814,300 University of New Mexico, MBIA, 5.75%, 2010 (c) 500,000 532,240 -------------- $ 58,586,070 - ---------------------------------------------------------------------------------------------------------- Universities - Dormitories - 0.1% - ---------------------------------------------------------------------------------------------------------- Georgia Private College & University Authority Rev. (Mercer Housing Corp.), "A", 6%, 2021 $ 1,000,000 $ 1,065,000 - ---------------------------------------------------------------------------------------------------------- Universities - Secondary Schools - 0.5% - ---------------------------------------------------------------------------------------------------------- District of Columbia Rev. (Gonzaga College High School), FSA, 5.25%, 2032 $ 3,500,000 $ 3,739,470 Maine Finance Authority (Waynflete School), 6.5%, 2024 1,500,000 1,597,695 -------------- $ 5,337,165 - ---------------------------------------------------------------------------------------------------------- Utilities - Investor Owned - 2.1% - ---------------------------------------------------------------------------------------------------------- Farmington, NM, Pollution Control Rev. (New Mexico Public Service), "C", 5.8%, 2022 $ 4,880,000 $ 4,909,426 Forsyth, MT, Pollution Control Rev. (Northwestern Corp.), AMBAC, 4.65%, 2023 2,285,000 2,380,376 Lehigh County, PA, Industrial Development Authority Pollution Control Rev. (PPL Electric Utilities Corp.), "A", FGIC, 4.7%, 2029 1,180,000 1,226,999 Matagorda County, TX, District Pollution Control Rev. (AEP Texas Central), "N", AMBAC, 4.4%, 2030 3,840,000 3,856,474 Michigan Strategic Fund, Limited Obligation Rev. (Detroit Edison), MBIA, 7%, 2008 3,000,000 3,131,280 New Hampshire Industrial Development Authority, Pollution Control Rev. (Connecticut Light & Power), 5.9%, 2016 3,500,000 3,563,525 New Hampshire Industrial Development Authority, Pollution Control Rev. (Connecticut Light & Power), 5.9%, 2018 1,000,000 1,046,960 Sabine River Authority, TX, Pollution (TXU Electric Co.), 5.75%, 2030 1,500,000 1,542,975 -------------- $ 21,658,015 - ---------------------------------------------------------------------------------------------------------- Utilities - Municipal Owned - 12.7% - ---------------------------------------------------------------------------------------------------------- Austin, TX, Utility Systems Rev., AMBAC, 6.75%, 2012 $ 2,500,000 $ 2,877,025 Easley, SC, Utility Rev., Refunding & Improvement, FSA, 5%, 2034 1,090,000 1,168,829 Georgia Municipal Electric Authority Power Rev., AMBAC, 6.5%, 2014 (c) 145,000 171,565 Georgia Municipal Electric Authority Power Rev., AMBAC, 6.5%, 2017 8,000,000 9,472,080 Georgia Municipal Electric Authority Power Rev., ETM, AMBAC, 6.5%, 2017 (c) 365,000 431,912 Hawaii Department Budget & Finance Rev., "B" (Electric Co. & Subsidiary), XLCA, 5%, 2022 4,000,000 4,178,560 Intermountain Power Agency, UT, "A", AMBAC, 6%, 2009 (c) 9,000,000 9,476,550 Intermountain Power Agency, UT, "A", ETM, 6.15%, 2014 (c) 28,220,000 29,198,387 Intermountain Power Agency, UT, Rev., "A", 6.15%, 2014 230,000 234,078 Mercer County, ND, Pollution Control Rev. (Antelope Valley Station), AMBAC, 7.2%, 2013 4,000,000 4,508,720 North Carolina Eastern Municipal Power "A", MBIA, 6.5%, 2018 9,250,000 11,346,883 North Carolina Municipal Power, MBIA, 5.25%, 2019 (u) 7,000,000 7,544,250 North Carolina Municipal Power Agency, Catawba Electric Rev., 6.375%, 2013 1,500,000 1,615,830 Northern California Transmission Agency, MBIA, 7%, 2013 4,000,000 4,585,400 Piedmont, SC, Municipal Power Agency, FGIC, 6.25%, 2021 4,150,000 5,174,054 Puerto Rico Electric Power Authority, FSA, 5.25%, 2015 (u) 5,000,000 5,172,250 Puerto Rico Electric Power Authority, FSA, 5.25%, 2016 (u) 6,000,000 6,215,400 San Antonio, TX, Electric & Gas, "A", 5%, 2025 1,000,000 1,067,170 South Carolina Public Service Authority, "B", FSA, 5.125%, 2037 8,500,000 8,926,530 Southern California Public Power Authority Rev. (Magnolia Power), AMBAC, 5%, 2036 4,200,000 4,429,950 Washington Public Power Supply System Rev. (Nuclear Project #1), FSA, 5.125%, 2014 8,000,000 8,192,800 Washington Public Power Supply System Rev. (Nuclear Project #3), 7.125%, 2016 5,145,000 6,431,044 -------------- $ 132,419,267 - ---------------------------------------------------------------------------------------------------------- Water & Sewer Utility Revenue - 0.7% - ---------------------------------------------------------------------------------------------------------- Forsyth County, GA, Water & Sewer Authority Rev., 6.25%, 2010 (c) $ 1,055,000 $ 1,143,768 Forsyth County, GA, Water & Sewer Authority Rev., 6.25%, 2010 (c) 1,000,000 1,084,140 Massachusetts Water Resources Authority, "A", FSA, 4.5%, 2036 1,930,000 1,946,830 Spartanburg, SC, Water & Sewer Authority Rev., "B", MBIA, 5.25%, 2030 920,000 998,264 West Virginia Water Development Authority Loan Program, "B", AMBAC, 4.75%, 2035 390,000 404,836 West Wilson Utility District, TN, Waterworks Rev., MBIA, 5.25%, 2014 (c) 1,730,000 1,902,291 -------------- $ 7,480,129 - ---------------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL BONDS (IDENTIFIED COST, $1,014,042,443) $1,086,593,269 - ---------------------------------------------------------------------------------------------------------- Floating Rate Demand Notes - 1.1% - ---------------------------------------------------------------------------------------------------------- Allegheny County, PA, Hospital Development Authority Rev. (Presbyterian University Hospital), "B", 3.7%, due 3/01/07 $ 200,000 $ 200,000 East Baton Rouge, LA, Pollution Control Rev. (Exxon Mobil Corp.), 3.61%, due 3/01/07 100,000 100,000 Harris County, TX, Health Facilities Development Rev. (University of Texas Medical Center), 3.64%, due 3/01/07 300,000 300,000 Jackson County, MS, Pollution Control Rev. (Chevron USA, Inc.), 3.66%, due 3/01/07 100,000 100,000 Jefferson County, AL, Sewer Rev., Capital Improvement Warrants Rev., "A", 3.68%, due 3/01/07 500,000 500,000 Lincoln County, WY, Pollution Control Rev. (Exxon Mobil Corp.), 3.61%, due 3/01/07 1,600,000 1,600,000 Lincoln County, WY, Pollution Control Rev. (Exxon Mobil Corp.), 3.66%, due 3/01/07 2,500,000 2,500,000 Lincoln County, WY, Pollution Control Rev. (Exxon Mobil Corp.), "C", 3.66%, due 3/01/07 200,000 200,000 New York, NY, 3.63%, due 3/01/07 2,000,000 2,000,000 Petersburg, IN, Pollution Control Rev. (Indianapolis Power & Light Co.), "B", 3.58%, due 3/07/07 2,600,000 2,600,000 Sevier County, TN, Public Building Authority, 3.64%, due 3/01/07 200,000 200,000 State of Oregon, "73G", 3.5%, due 3/07/07 900,000 900,000 Triborough Bridge & Tunnel Authority, NY, Rev., "F", 3.66%, due 3/01/07 400,000 400,000 - ---------------------------------------------------------------------------------------------------------- TOTAL FLOATING RATE DEMAND NOTES (IDENTIFIED COST, $11,600,000) $ 11,600,000 - ---------------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS (IDENTIFIED COST, $1,025,642,443) (k) $1,098,193,269 - ---------------------------------------------------------------------------------------------------------- Other Assets, Less Liabilities - (5.5)% (56,842,240) - ---------------------------------------------------------------------------------------------------------- NET ASSETS - 100.0% $1,041,351,029 - ---------------------------------------------------------------------------------------------------------- (c) Refunded bond. (k) As of February 28, 2007, the fund held securities fair valued in accordance with the policies adopted by the Board of Trustees, aggregating $1,086,593,269 and 98.94% of market value. All of these security values were provided by an independent pricing service using an evaluated bid. (n) Securities exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be sold in the ordinary course of business in transactions exempt from registration, normally to qualified institutional buyers. At period end, the aggregate value of these securities was $2,125,276, representing 0.2% of net assets. (p) Primary inverse floater. (u) Underlying security deposited into special purpose trust ("the trust") by investment banker upon creation of self-deposited inverse floaters. SWAP AGREEMENTS AT 2/28/07 UNREALIZED NOTIONAL CASH FLOWS CASH FLOWS APPRECIATION EXPIRATION AMOUNT COUNTERPARTY TO RECEIVE TO PAY (DEPRECIATION) - ---------------------------------------------------------------------------------------------------------------- INTEREST RATE SWAPS 12/01/07 USD 27,000,000 Merrill Lynch 7-Day BMA 2.795% (fixed rate) $ 201,174 7/23/22 USD 10,000,000 Merrill Lynch 7-Day BMA 3.889% (fixed rate) (140,120) --------- $ 61,054 ========= At February 28, 2007, the fund had sufficient cash and/or securities to cover any commitments under these derivative contracts. The following abbreviations are used in this report and are defined: BMA Bond Market Assn. ETM Escrowed to Maturity Insurers - ---------------------------------------------- AMBAC AMBAC Indemnity Corp. FGIC Financial Guaranty Insurance Co. FHA Federal Housing Administration FNMA Federal National Mortgage Assn. FSA Financial Security Assurance Inc. GNMA Government National Mortgage Assn. MBIA MBIA Insurance Corp. PSF Permanent School Fund XLCA XL Capital Insurance Co. Inverse Floaters - ---------------------------------------------- RITES Residual Interest Tax-Exempt Security SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF ASSETS AND LIABILITIES At 2/28/07 (unaudited) This statement represents your fund's balance sheet, which details the assets and liabilities comprising the total value of the fund. ASSETS - ------------------------------------------------------------------------------------------------------- Investments, at value (identified cost, $1,025,642,443) $1,098,193,269 Cash 15,196 Receivable for investments sold 776,165 Receivable for fund shares sold 437,207 Interest and dividends receivable 13,292,059 Unrealized appreciation on interest rate swap agreements 201,174 Other assets 46,950 - ------------------------------------------------------------------------------------------------------- Total assets $1,112,962,020 - ------------------------------------------------------------------------------------------------------- LIABILITIES - ------------------------------------------------------------------------------------------------------- Distributions payable $1,576,634 Payable for investments purchased 2,490,526 Payable to the holder of the floating rate certificate from trust assets 65,530,000 Payable for fund shares reacquired 993,947 Unrealized depreciation on interest rate swap agreements 140,120 Payable to affiliates Management fee 17,074 Shareholder servicing costs 52,530 Distribution and service fees 5,491 Administrative services fee 1,036 Payable for independent trustees' compensation 60,018 Payable for interest expense and fees 631,363 Accrued expenses and other liabilities 112,252 - ------------------------------------------------------------------------------------------------------- Total liabilities $71,610,991 - ------------------------------------------------------------------------------------------------------- Net assets $1,041,351,029 - ------------------------------------------------------------------------------------------------------- NET ASSETS CONSIST OF - ------------------------------------------------------------------------------------------------------- Paid-in capital $962,924,438 Unrealized appreciation (depreciation) on investments 72,611,880 Accumulated net realized gain (loss) on investments 3,857,012 Undistributed net investment income 1,957,699 - ------------------------------------------------------------------------------------------------------- Net assets $1,041,351,029 - ------------------------------------------------------------------------------------------------------- Shares of beneficial interest outstanding 99,348,002 - ------------------------------------------------------------------------------------------------------- Statement of Assets and Liabilities (unaudited) - continued Class A shares - ------------------------------------------------------------------------------------------------------- Net assets $1,003,641,388 Shares outstanding 95,746,781 - ------------------------------------------------------------------------------------------------------- Net asset value per share $10.48 - ------------------------------------------------------------------------------------------------------- Offering price per share (100/95.25Xnet asset value per share) $11.00 - ------------------------------------------------------------------------------------------------------- Class B shares - ------------------------------------------------------------------------------------------------------- Net assets $37,709,641 Shares outstanding 3,601,221 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $10.47 - ------------------------------------------------------------------------------------------------------- On sales of $50,000 or more, the offering price of Class A shares is reduced. A contingent deferred sales charge may be imposed on redemptions of Class A and Class B shares. SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF OPERATIONS Six months ended 2/28/07 (unaudited) This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. NET INVESTMENT INCOME - ------------------------------------------------------------------------------------------------------ Income Interest $31,167,886 Other 27,877 - ------------------------------------------------------------------------------------------------------ Total investment income $31,195,763 - ------------------------------------------------------------------------------------------------------ Expenses Management fee $2,090,369 Distribution and service fees 154,077 Shareholder servicing costs 537,907 Administrative services fee 95,040 Independent trustees' compensation 17,520 Custodian fee 129,151 Shareholder communications 32,245 Auditing fees 23,201 Legal fees 15,429 Interest expense and fees 1,274,653 Miscellaneous 73,897 - ------------------------------------------------------------------------------------------------------ Total expenses $4,443,489 - ------------------------------------------------------------------------------------------------------ Fees paid indirectly (90,606) Reduction of expenses by investment adviser (525,380) - ------------------------------------------------------------------------------------------------------ Net expenses $3,827,503 - ------------------------------------------------------------------------------------------------------ Net investment income $27,368,260 - ------------------------------------------------------------------------------------------------------ REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS - ------------------------------------------------------------------------------------------------------ Realized gain (loss) (identified cost basis) Investment transactions $2,153,980 Swap transactions (879,937) - ------------------------------------------------------------------------------------------------------ Net realized gain (loss) on investments $1,274,043 - ------------------------------------------------------------------------------------------------------ Change in unrealized appreciation (depreciation) Investments $(1,363,997) Swap transactions 136,749 - ------------------------------------------------------------------------------------------------------ Net unrealized gain (loss) on investments $(1,227,248 - ------------------------------------------------------------------------------------------------------ Net realized and unrealized gain (loss) on investments $46,795 - ------------------------------------------------------------------------------------------------------ Change in net assets from operations $27,415,055 - ------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENTS OF CHANGES IN NET ASSETS These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. SIX MONTHS ENDED YEAR ENDED 2/28/07 8/31/06 (UNAUDITED) CHANGE IN NET ASSETS FROM OPERATIONS - ------------------------------------------------------------------------------------------------------- Net investment income $27,368,260 $53,971,557 Net realized gain (loss) on investments 1,274,043 7,576,834 Net unrealized gain (loss) on investments (1,227,248) (30,229,530) - ------------------------------------------------------------------------------------------------------- Change in net assets from operations $27,415,055 $31,318,861 - ------------------------------------------------------------------------------------------------------- DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------- From net investment income Class A $(24,414,759) $(51,235,558) Class B (826,608) (2,015,747) From net realized gain on investments Class A (5,821,976) (4,372,165) Class B (235,831) (211,792) - ------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(31,299,174) $(57,835,262) - ------------------------------------------------------------------------------------------------------- Change in net assets from fund share transactions $(21,950,071) $(59,309,355) - ------------------------------------------------------------------------------------------------------- Total change in net assets $(25,834,190) $(85,825,756) - ------------------------------------------------------------------------------------------------------- NET ASSETS - ------------------------------------------------------------------------------------------------------- At beginning of period 1,067,185,219 1,153,010,975 At end of period (including undistributed net investment income of $1,957,699 and accumulated distributions in excess of net investment income of $169,194) $1,041,351,029 $1,067,185,219 - ------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Statements FINANCIAL HIGHLIGHTS The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years. Certain information reflects financial results for a single fund share. The total returns in the table represent the rate by which an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period. SIX MONTHS YEARS ENDED 8/31 ENDED ----------------------------------------------------------------------- CLASS A 2/28/07 2006 2005 2004 2003 2002 (UNAUDITED) Net asset value, beginning of period $10.52 $10.77 $10.81 $10.64 $10.87 $10.77 - ------------------------------------------------------------------------------------------------------------------------------ INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------------ Net investment income (d) $0.27 $0.52 $0.52 $0.53 $0.52 $0.53 Net realized and unrealized gain (loss) on investments 0.00(w) (0.21) (0.04) 0.17 (0.22) 0.10 - ------------------------------------------------------------------------------------------------------------------------------ Total from investment operations $0.27 $0.31 $0.48 $0.70 $0.30 $0.63 - ------------------------------------------------------------------------------------------------------------------------------ LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------------------------ From net investment income $(0.25) $(0.52) $(0.52) $(0.53) $(0.53) $(0.53) From net realized gain on investments (0.06) (0.04) -- -- -- -- - ------------------------------------------------------------------------------------------------------------------------------ Total distributions declared to shareholders $(0.31) $(0.56) $(0.52) $(0.53) $(0.53) $(0.53) - ------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $10.48 $10.52 $10.77 $10.81 $10.64 $10.87 - ------------------------------------------------------------------------------------------------------------------------------ Total return (%) (r)(s)(t) 2.63(n) 2.99 4.58 6.70 2.80 6.17 - ------------------------------------------------------------------------------------------------------------------------------ RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------------ Expenses before expense reductions (f) 0.82(a) 0.80 0.72 0.65 0.65 0.67 Expenses after expense reductions (f) 0.72(a) 0.70 0.62 0.60 N/A N/A Expenses after expense reductions and excluding interest expense and fees (f)(l) 0.48(a) 0.49 0.49 0.53 0.59 0.59 Net investment income 5.27(a) 4.96 4.87 4.92 4.76 5.01 Portfolio turnover 6 12 9 9 13 14 Net assets at end of period (000 Omitted) $1,003,641 $1,023,965 $1,097,308 $1,147,174 $1,290,801 $1,308,191 - ------------------------------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued SIX MONTHS YEARS ENDED 8/31 ENDED ---------------------------------------------------------------- CLASS B 2/28/07 2006 2005 2004 2003 2002 (UNAUDITED) Net asset value, beginning of period $10.51 $10.76 $10.80 $10.63 $10.86 $10.76 - ------------------------------------------------------------------------------------------------------------------------------ INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------------ Net investment income (d) $0.23 $0.44 $0.44 $0.45 $0.43 $0.45 Net realized and unrealized gain (loss) on investments 0.00(w) (0.21) (0.04) 0.16 (0.22) 0.10 - ------------------------------------------------------------------------------------------------------------------------------ Total from investment operations $0.23 $0.23 $0.40 $0.61 $0.21 $0.55 - ------------------------------------------------------------------------------------------------------------------------------ LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------------------------ From net investment income $(0.21) $(0.44) $(0.44) $(0.44) $(0.44) $(0.45) From net realized gain on investments (0.06) (0.04) -- -- -- -- - ------------------------------------------------------------------------------------------------------------------------------ Total distributions declared to shareholders $(0.27) $(0.48) $(0.44) $(0.44) $(0.44) $(0.45) - ------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $10.47 $10.51 $10.76 $10.80 $10.63 $10.86 - ------------------------------------------------------------------------------------------------------------------------------ Total return (%) (r)(s)(t) 2.24(n) 2.21 3.80 5.86 1.96 5.33 - ------------------------------------------------------------------------------------------------------------------------------ RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------------ Expenses before expense reductions (f) 1.58(a) 1.56 1.49 1.43 1.45 1.47 Expenses after expense reductions (f) 1.48(a) 1.46 1.39 1.38 N/A N/A Expenses after expense reductions and excluding interest expense and fees (f)(l) 1.24(a) 1.25 1.26 1.31 1.39 1.39 Net investment income 4.51(a) 4.20 4.10 4.12 3.96 4.20 Portfolio turnover 6 12 9 9 13 14 Net assets at end of period (000 Omitted) $37,710 $43,220 $55,703 $66,927 $82,029 $83,990 - ------------------------------------------------------------------------------------------------------------------------------ Any redemption fees charged by the fund during the 2004 and 2005 fiscal years resulted in a per share impact of less than $0.01. (a) Annualized. (d) Per share data are based on average shares outstanding. (f) Ratios do not reflect reductions from fees paid indirectly. (l) Interest expense and fees relate to payments made to the holder of the floating rate certificate from trust assets. (n) Not annualized. (r) Certain expenses have been reduced without which performance would have been lower. (s) From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. (t) Total returns do not include any applicable sales charges. (w) Per share amount was less than $0.01. SEE NOTES TO FINANCIAL STATEMENTS NOTES TO FINANCIAL STATEMENTS (unaudited) (1) BUSINESS AND ORGANIZATION MFS Municipal Bond Fund (the fund) is a series of MFS Series Trust IV which is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company. (2) SIGNIFICANT ACCOUNTING POLICIES GENERAL - 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. Municipal securities backed by current or anticipated revenues from a specific project or specific assets can be negatively affected by the discontinuance of the taxation supporting the projects or assets or the inability to collect revenues for the project or from the assets. If the Internal Revenue Service determines an issuer of a municipal security has not complied with applicable tax requirements, the security could decline in value, interest from the security could become taxable and the fund may be required to issue Forms 1099-DIV. INVESTMENT VALUATIONS - Debt instruments (other than short-term instruments), including restricted debt instruments, are generally valued at an evaluated or composite bid as reported by an independent pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Swaps are generally valued at an evaluated bid as reported by an independent pricing service. Securities and other assets generally valued on the basis of information from an independent pricing service may also be valued at a broker-dealer bid quotation. Values obtained from pricing services can utilize both dealer-supplied valuations and electronic data processing techniques, which take into account factors such as institutional-size trading in similar groups of securities, yield, quality, coupon rate, maturity, type of issue, trading characteristics, and other market data. The Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund's investments (including any fair valuation) to the adviser pursuant to valuation policies and procedures approved by the Board. If the adviser determines that reliable market quotations are not readily available, investments are valued at fair value as determined in good faith by the adviser in accordance with such procedures under the oversight of the Board of Trustees. Under the fund's valuation policies and procedures, market quotations are not considered to be readily available for many types of debt instruments and certain types of derivatives. These investments are generally valued at fair value based on information from independent pricing services. In addition, investments may be valued at fair value if the adviser determines that an investment's value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund's net asset value, or after the halting of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur on a frequent basis after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund's net asset value may be deemed to have a material affect on the value of securities traded in foreign markets. Accordingly, the fund's foreign equity securities may often be valued at fair value. The adviser may rely on independent pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund's net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of investments used to determine the fund's net asset value may differ from quoted or published prices for the same investments. In September 2006, FASB Statement No. 157, Fair Value Measurements (the "Statement") was issued, and is effective for fiscal years beginning after November 15, 2007 and for all interim periods within those fiscal years. This Statement provides a single definition of fair value, a hierarchy for measuring fair value and expanded disclosures about fair value measurements. Management is evaluating the application of the Statement to the fund, and believes the impact will be limited to expanded disclosures resulting from the adoption of this Statement in the fund's financial statements. DERIVATIVE RISK - The fund may invest in derivatives for hedging or non- hedging purposes. While hedging can reduce or eliminate losses, it can also reduce or eliminate gains. When the fund uses derivatives as an investment to gain market exposure, or for hedging purposes, gains and losses from derivative instruments may be substantially greater than the derivative's original cost. Derivative instruments include swap agreements and inverse floaters. SWAP AGREEMENTS - The fund may enter into swap agreements. A swap is an exchange of cash payments between the fund and another party. Net cash payments are exchanged at specified intervals and are recorded as a realized gain or loss in the Statement of Operations. The value of the swap is adjusted daily and the change in value, including accruals of periodic amounts of interest to be paid or received, is recorded as unrealized appreciation or depreciation in the Statement of Operations. A liquidation payment received or made upon early termination is recorded as a realized gain or loss in the Statement of Operations. Collateral, in the form of cash or securities, may be required to be held in segregated accounts with the fund's custodian in connection with these agreements. Risk of loss may exceed amounts recognized on the Statement of Assets and Liabilities. These risks include the possible lack of a liquid market, failure of the counterparty to perform under the terms of the agreements, and unfavorable market movement of the underlying instrument. All swap agreements entered into by the fund with the same counterparty are generally governed by a single master agreement, which provides for the netting of all amounts owed by the parties under the agreement upon the occurrence of an event of default, thereby reducing the credit risk to which such party is exposed. The fund holds interest rate swap agreements which involve the periodic exchange of cash flows, such as the exchange of fixed rate interest payments for floating rate interest payments based on a notional principal amount. The interest rates may be based on a specific financial index or the exchange of two distinct floating rate payments. The fund may enter into an interest rate swap in order to manage its exposure to interest rate fluctuations. INVERSE FLOATERS - The fund invests in municipal inverse floating rate securities which are structured by the issuer (known as primary market inverse floating rate securities) or by an investment banker utilizing municipal bonds which have already been issued (known as secondary market inverse floating rate securities) to have variable rates of interest which typically move in the opposite direction of short term interest rates. A secondary market inverse floating rate security is created when an investment banker transfers a fixed rate municipal bond to a special purpose trust, and causes the trust to (a) issue floating rate certificates to third parties, in an amount equal to a fraction of the par amount of the deposited bonds (these certificates usually pay tax-exempt interest at short-term interest rates that typically reset weekly; and the certificate holders typically, on seven days notice, have the option to tender their certificates to the investment banker or another party for redemption at par plus accrued interest), and (b) issue inverse floating rate certificates (sometimes referred to as "inverse floaters"). If the holder of the inverse floater transfers the municipal bonds to an investment banker for the purpose of depositing the municipal bonds into the special purpose trust, the inverse floating rate certificates that are issued by the trust are referred to as "self-deposited inverse floaters." If the bonds held by the trust are purchased by the investment banker for deposit into the trust from someone other than the purchasers of the inverse floaters, the inverse floating rate certificates that are issued by the trust are referred to as "externally deposited inverse floaters." Such self-deposited inverse floaters held by the fund are accounted for as secured borrowings, with the municipal bonds reflected in the investments of the fund and amounts owed to the holder of the floating rate certificate under the provisions of the trust, which amounts are paid solely from the assets of the trust, reflected as liabilities of the fund in the Statement of Assets and Liabilities under the caption, "Payable to the holder of the floating rate certificate from trust assets". At February 28, 2007, the fund's payable to the holder of the floating rate certificate from trust assets was $65,530,000. The weighted average interest rate on the floating rate certificates issued by the trust was 3.49%. Interest expense and fees relate to payments made to the holder of the floating rate certificate from trust assets in connection with self-deposited inverse floater transactions. Interest expense and fees are recorded as incurred. For the year ended February 28, 2007, interest expense and fees in connection with self-deposited inverse floaters was $1,274,653. Primary and externally deposited inverse floaters held by the fund are not accounted for as secured borrowings. INDEMNIFICATIONS - Under the fund's organizational documents, its officers and trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred. INVESTMENT TRANSACTIONS AND INCOME - Investment transactions are recorded on the trade date. Interest income is recorded on the accrual basis. All premium and discount is amortized or accreted for financial statement purposes in accordance with U.S. generally accepted accounting principles. All premium and original issue discount is amortized or accreted for tax reporting purposes as required by federal income tax regulations. The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving its portfolio holdings are reflected in realized gain/loss in the Statement of Operations, or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations. FEES PAID INDIRECTLY - The fund's custody fee is reduced according to an arrangement that measures the value of cash deposited with the custodian by the fund. This amount, for the six months ended February 28, 2007, is shown as a reduction of total expenses on the Statement of Operations. TAX MATTERS AND DISTRIBUTIONS - The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable and tax-exempt income, including realized capital gains. Accordingly, no provision for federal income tax is required in the financial statements. Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Book/tax differences primarily relate to amortization and accretion of debt securities, secured borrowings, and treating a portion of the proceeds from redemptions as a distribution for tax purposes. The tax character of distributions made during the current period will be determined at fiscal year end. The tax character of distributions declared to shareholders is as follows: 8/31/06 Ordinary income (including any short-term capital gains) $234,209 Tax-exempt income 53,251,305 Long-term capital gain 4,349,748 ---------------------------------------------------------- Total distributions $57,835,262 The federal tax cost and the tax basis components of distributable earnings were as follows: AS OF 2/28/07 Cost of investments $955,475,431 ---------------------------------------------------------- Gross appreciation $77,915,785 Gross depreciation (727,947) ---------------------------------------------------------- Net unrealized appreciation (depreciation) $77,187,838 AS OF 8/31/06 Undistributed ordinary income 3,011,042 Undistributed tax-exempt income 4,159,432 Undistributed long-term capital gain 3,044,715 Other temporary differences (4,461,211) Net unrealized appreciation (depreciation) 76,556,732 The aggregate cost above includes prior fiscal year end tax adjustments. In June 2006, FASB Interpretation No. 48, Accounting for Uncertainty in Income Taxes (the "Interpretation") was issued, and is effective for fiscal years beginning after December 15, 2006 and is to be applied to all open tax years as of the effective date. On December 22, 2006, the SEC delayed the implementation of the Interpretation for regulated investment companies for an additional six months. This Interpretation prescribes a minimum threshold for financial statement recognition of the benefit of a tax position taken or expected to be taken in a tax return, and requires certain expanded disclosures. Management is evaluating the application of the Interpretation to the fund, and has not at this time determined the impact, if any, resulting from the adoption of this Interpretation on the fund's financial statements. MULTIPLE CLASSES OF SHARES OF BENEFICIAL INTEREST - The fund offers multiple classes of shares, which differ in their respective distribution and service fees. All shareholders bear the common expenses of the fund based on the value of settled shares outstanding of each class, without distinction between share classes. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B shares will convert to Class A shares approximately eight years after purchase. (3) TRANSACTIONS WITH AFFILIATES INVESTMENT ADVISER - The fund has an investment advisory agreement with Massachusetts Financial Services Company (MFS) to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at the following annual rates: First $1.3 billion of average daily net assets 0.40% Next $0.7 billion of average daily net assets 0.37% Average daily net assets in excess of $2 billion 0.35% As part of a settlement agreement with the New York Attorney General concerning market timing and related matters, MFS has agreed to reduce the management fee to 0.30% of the fund's average daily net assets for the period March 1, 2004 through February 28, 2009. For the six months ended February 28, 2007, this waiver amounted to $522,592 and is reflected as a reduction of total expenses in the Statement of Operations. The management fee incurred for the six months ended February 28, 2007 was equivalent to an annual effective rate of 0.30% of the fund's average daily net assets. DISTRIBUTOR - MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $39,333 for the six months ended February 28, 2007, as its portion of the initial sales charge on sales of Class A shares of the fund. The Board of Trustees has adopted a distribution plan for certain class shares pursuant to Rule 12b-1 of the Investment Company Act of 1940. The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. Distribution Fee Plan Table: TOTAL ANNUAL DISTRIBUTION DISTRIBUTION SERVICE DISTRIBUTION EFFECTIVE AND SERVICE FEE RATE FEE RATE PLAN(d) RATE(e) FEE Class B 0.75% 0.25% 1.00% 0.76% $154,077 (d) In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees up to these annual percentage rates of each class' average daily net assets. (e) The annual effective rates represent actual fees incurred under the distribution plan for the six months ended February 28, 2007 based on each class' average daily net assets. For one year from the date of sale of Class B shares, assets attributable to such Class B shares are subject to the 0.25% annual Class B service fee. On assets attributable to all other Class B shares, the service fee is not currently in effect, but may be implemented on such date as the fund's Board of Trustees may determine. Certain Class A shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within 12 months of purchase. Class B shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within six years of purchase. All contingent deferred sales charges are paid to MFD and during the six months ended February 28, 2007, were as follows: AMOUNT Class A $7,974 Class B $46,223 SHAREHOLDER SERVICING AGENT - MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average daily net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the six months ended February 28, 2007, the fee was $400,085, which equated to 0.0766% annually of the fund's average daily net assets. Effective January 1, 2007, MFSC has entered into a sub-accounting agreement with SunLife Retirement Services (U.S.), Inc. (SRS), an affiliate of MFSC, on behalf of the fund to provide omnibus account services to the fund. MFSC pays SRS both an asset based fee and a per account charge of the assets held in the omnibus account. The fund then reimburses MFSC for the sub- accounting fees paid to SRS. For the six months ended February 28, 2007, the sub-accounting fee for SRS was $28, which equated to less than 0.01% annually of the fund's average daily net assets. MFSC also receives payment from the fund for out-of-pocket and sub-accounting expenses. For the six months ended February 28, 2007, these out-of-pocket and sub-accounting costs amounted to $105,072. The fund may also pay shareholder servicing related costs directly to non-related parties. ADMINISTRATOR - MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund. Under an administrative services agreement, the fund partially reimburses MFS the costs incurred to provide these services. The fund is charged a fixed amount plus a fee based on calendar year average net assets. The fund's annual fixed amount is $17,500. The administrative services fee incurred for the six months ended February 28, 2007 was equivalent to an annual effective rate of 0.0182% of the fund's average daily net assets. TRUSTEES' AND OFFICERS' COMPENSATION - The fund pays compensation to independent trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. The fund does not pay compensation directly to trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration for their services to the fund from MFS. Certain officers and trustees of the fund are officers or directors of MFS, MFD, and MFSC. The fund has an unfunded, defined benefit plan for certain retired independent trustees which resulted in a pension expense of $2,395. This amount is included in independent trustees' compensation for the six months ended February 28, 2007. The liability for deferred retirement benefits payable to certain retired independent trustees amounted to $58,111 at February 28, 2007, and is included in payable for independent trustees' compensation. OTHER - This fund and certain other MFS funds (the funds) have entered into a services agreement (the Agreement) which provides for payment of fees by the funds to Tarantino LLC in return for the provision of services of an Independent Chief Compliance Officer (ICCO) for the funds. The ICCO is an officer of the funds and the sole member of Tarantino LLC. The funds can terminate the Agreement with Tarantino LLC at any time under the terms of the Agreement. For the six months ended February 28, 2007, the fee paid to Tarantino LLC was $4,219. MFS has agreed to reimburse the fund for a portion of the payments made by the funds to Tarantino LLC in the amount of $2,788, which is shown as a reduction of total expenses in the Statement of Operations. Additionally, MFS has agreed to bear all expenses associated with office space, other administrative support, and supplies provided to the ICCO. (4) PORTFOLIO SECURITIES Purchases and sales of investments, other than U.S. government securities, purchased option transactions, and short-term obligations, aggregated $60,509,394 and $93,172,651, respectively. (5) SHARES OF BENEFICIAL INTEREST The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows: SIX MONTHS ENDED YEAR ENDED 2/28/07 8/31/06 SHARES AMOUNT SHARES AMOUNT Shares sold Class A 2,300,784 $24,124,919 4,431,648 $46,577,608 Class B 97,467 1,023,798 279,641 2,936,579 - ----------------------------------------------------------------------------------------------------------- 2,398,251 $25,148,717 4,711,289 $49,514,187 Shares issued to shareholders in reinvestment of distributions Class A 1,828,105 $19,211,898 3,283,252 $34,528,092 Class B 61,344 644,189 126,124 1,325,579 - ----------------------------------------------------------------------------------------------------------- 1,889,449 $19,856,087 3,409,376 $35,853,671 Shares reacquired Class A (5,711,954) $(59,931,468) (12,282,330) $(129,197,060) Class B (670,231) (7,023,407) (1,471,401) (15,480,153) - ----------------------------------------------------------------------------------------------------------- (6,382,185) $(66,954,875) (13,753,731) $(144,677,213) Net change Class A (1,583,065) $(16,594,651) (4,567,430) $(48,091,360) Class B (511,420) (5,355,420) (1,065,636) (11,217,995) - ----------------------------------------------------------------------------------------------------------- (2,094,485) $(21,950,071) (5,633,066) $(59,309,355) (6) LINE OF CREDIT The fund and other funds managed by MFS participate in a $1 billion unsecured committed line of credit provided by a syndication of banks under a credit agreement. In addition, the fund and other funds managed by MFS have established uncommitted borrowing arrangements with certain banks. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the Federal Reserve funds rate plus 0.35%. In addition, a commitment fee, based on the average daily, unused portion of the committed line of credit, is allocated among the participating funds at the end of each calendar quarter. For the six months ended February 28, 2007, the fund's commitment fee and interest expense on the line of credit were $3,255 and $0, respectively, and are included in miscellaneous expense on the Statement of Operations. BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT A discussion regarding the Board's most recent review and renewal of the Fund's investment advisory agreement is available by clicking on the fund's name under "Select a fund" on the MFS Web site (mfs.com). PROXY VOTING POLICIES AND INFORMATION A general description of the MFS funds' proxy voting policies and procedures is available without charge, upon request, by calling 1-800-225-2606, by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available without charge by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. QUARTERLY PORTFOLIO DISCLOSURE The fund will file a complete schedule of portfolio holdings with the Securities and Exchange Commission (the Commission) for the first and third quarters of each fiscal year on Form N-Q. The fund's Form N-Q may be reviewed and copied at the: Public Reference Room Securities and Exchange Commission 100 F Street, NE, Room 1580 Washington, D.C. 20549 Information on the operation of the Public Reference Room may be obtained by calling the Commission at 1-202-551-5850. The fund's Form N-Q is available on the EDGAR database on the Commission's Internet Web site at http://www.sec.gov, and copies of this information may be obtained, upon payment of a duplicating fee, by electronic request at the following e-mail address: publicinfo@sec.gov or by writing the Public Reference Section at the above address. A shareholder can also obtain the quarterly portfolio holdings report at mfs.com. CONTACT US WEB SITE MAILING ADDRESS mfs.com MFS Service Center, Inc. P.O. Box 55824 MFS TALK Boston, MA 02205-5824 1-800-637-8255 24 hours a day OVERNIGHT MAIL MFS Service Center, Inc. ACCOUNT SERVICE AND 500 Boylston Street LITERATURE Boston, MA 02116-3741 SHAREHOLDERS 1-800-225-2606 8 a.m. to 8 p.m. ET INVESTMENT PROFESSIONALS 1-800-343-2829 8 a.m. to 8 p.m. ET RETIREMENT PLAN SERVICES 1-800-637-1255 8 a.m. to 8 p.m. ET - ------------------------------------------------------------------------------- Go paperless with eDELIVERY: Arrange to have MFS send prospectuses, reports, and proxies directly to your e-mail inbox. You'll get timely information and less clutter in your mailbox (not to mention help your fund save printing and postage costs). SIGN UP: If your account is registered with us, simply go to mfs.com, log in to your account via MFS Access, and select the eDelivery sign up options. If you own your MFS fund shares through a financial institution or a retirement plan, MFS TALK, MFS Access, and eDelivery may not be available to you. - ------------------------------------------------------------------------------- M F S(R) INVESTMENT MANAGEMENT ITEM 2. CODE OF ETHICS. The Registrant has not amended any provision in its Code of Ethics (the "Code") that relates to any element of the Code's definition enumerated in paragraph (b) of Item 2 of this Form N-CSR. ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. Not applicable for semi-annual reports. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. Not applicable for semi-annual reports. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS. Not applicable to the Registrant. ITEM 6. SCHEDULE OF INVESTMENTS. A schedule of investments for each series of the Registrant is included as part of the report to shareholders of such series under Item 1 of this Form N-CSR. ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. Not applicable to the Registrant. ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES. Not applicable to the Registrant. ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS. Not applicable to the Registrant. ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. There were no material changes to the procedures by which shareholders may send recommendations to the Board for nominees to the Registrant's Board since the Registrant last provided disclosure as to such procedures in response to the requirements of Item 407(c)(2)(iv) of Regulation S-K (as required by Item 22(b)(15) of Schedule 14A), or this Item. ITEM 11. CONTROLS AND PROCEDURES. (a) Based upon their evaluation of the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940 (the "Act")) as conducted within 90 days of the filing date of this report on Form N-CSR, the registrant's principal financial officer and principal executive officer have concluded that those disclosure controls and procedures provide reasonable assurance that the material information required to be disclosed by the registrant on this report is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms. (b) There were no changes in the registrant's internal controls over financial reporting (as defined in Rule 30a-3(d) under the Act) that occurred during the second fiscal quarter of the period covered by the report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. ITEM 12. EXHIBITS. (a) File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (1) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit. (2) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2 under the Act (17 CFR 270.30a-2): Attached hereto. (b) If the report is filed under Section 13(a) or 15(d) of the Exchange Act, provide the certifications required by Rule 30a-2(b) under the Act (17 CFR 270.30a-2(b)), Rule 13a-14(b) or Rule 15d-14(b) under the Exchange Act (17 CFR 240.13a-14(b) or 240.15d-14(b)) and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. 1350) as an exhibit. A certification furnished pursuant to this paragraph will not be deemed "filed" for the purposes of Section 18 of the Exchange Act (15 U.S.C. 78r), or otherwise subject to the liability of that section. Such certification will not be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Exchange Act, except to the extent that the registrant specifically incorporates it by reference: Attached hereto. NOTICE A copy of the Amended and Restated Declaration of Trust of the Registrant is on file with the Secretary of State of The Commonwealth of Massachusetts and notice is hereby given that this instrument is executed on behalf of the Registrant by an officer of the Registrant as an officer and not individually and the obligations of or arising out of this instrument are not binding upon any of the Trustees or shareholders individually, but are binding only upon the assets and property of the respective constituent series of the Registrant. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) MFS SERIES TRUST IV ------------------------------------------------------------------- By (Signature and Title)* MARIA F. DWYER ------------------------------------------------------ Maria F. Dwyer, President Date: April 16, 2007 -------------- Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* MARIA F. DWYER ------------------------------------------------------ Maria F. Dwyer, President (Principal Executive Officer) Date: April 16, 2007 -------------- By (Signature and Title)* TRACY ATKINSON ------------------------------------------------------ Tracy Atkinson, Treasurer (Principal Financial Officer and Accounting Officer) Date: April 16, 2007 -------------- * Print name and title of each signing officer under his or her signature.