<Page> 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: 811-08764 ------------------------------------------------- UBS PACE Select Advisors Trust - -------------------------------------------------------------------------------- (Exact name of registrant as specified in charter) 51 West 52nd Street, New York, New York 10019-6114 - -------------------------------------------------------------------------------- (Address of principal executive offices) (Zip code) Amy R. Doberman UBS Global Asset Management (US) Inc. 51 West 52nd Street New York, NY 10019-6114 (Name and address of agent for service) Copy to: Jack W. Murphy, Esq. Dechert LLP 1775 I Street, N.W. Washington, DC 20006-2401 Registrant's telephone number, including area code: 212-882 5000 Date of fiscal year end: July 31 Date of reporting period: January 31, 2004 <Page> ITEM 1. REPORTS TO STOCKHOLDERS. <Page> [UBS GLOBAL ASSET MANAGEMENT LOGO] UBS PACE MONEY MARKET INVESTMENTS SEMIANNUAL REPORT JANUARY 31, 2004 <Page> UBS PACE MONEY MARKET INVESTMENTS March 15, 2004 DEAR SHAREHOLDER, We present you with the semiannual report for UBS PACE Money Market Investments for the six months ended January 31, 2004. PERFORMANCE During the six months ended January 31, 2004, the Portfolio returned 0.25% (before the deduction of the UBS PACE program fee; after the deduction of the maximum program fee, the Portfolio declined 0.51%). In comparison, the 90-Day US T-Bill Index and the Lipper Money Market Funds Median returned 0.48% and 0.17%, respectively. (Returns over various time periods are shown in the table on page 4. Please note that the returns shown do not reflect the deduction of taxes that a shareholder would pay on Portfolio distributions.) AN INTERVIEW WITH PORTFOLIO MANAGER MICHAEL H. MARKOWITZ Q. CAN YOU DESCRIBE THE ECONOMIC ENVIRONMENT OVER THE REVIEW PERIOD? A. During the reporting period, the combined effects of significantly higher military spending, an increase in exports and a stronger manufacturing sector, among other things, fueled an uptick in economic growth. The third quarter's GDP figure came in at 8.2%--far higher than anticipated, and the sharpest recorded advance since 1984. This was followed by a fourth quarter GDP figure of 4.1%, which, though lower than expected, still represented a solid gain. [SIDENOTE] UBS PACE MONEY MARKET INVESTMENTS INVESTMENT ADVISOR: UBS Global Asset Management (US) Inc. PORTFOLIO MANAGER: Michael H. Markowitz OBJECTIVE: Current income consistent with preservation of capital and liquidity. INVESTMENT PROCESS: The Portfolio is a money market mutual fund and seeks to maintain a stable price of $1.00 per share, although it may be possible to lose money by investing in this Portfolio. The Portfolio invests in a diversified portfolio of high-quality money market instruments of governmental and private issuers. Security selection is based on the assessment of relative values and changes in market and economic conditions. 1 <Page> Q. WHAT ACTIONS DID THE FEDERAL RESERVE BOARD (THE "FED") TAKE DURING THE PERIOD? A. Since cutting short-term interest rates on June 25, 2003, to 1.00%--its lowest level since 1958--the Federal Reserve (the "Fed") has held rates steady. At its most recent meeting on January 28, 2004, Fed Chairman Alan Greenspan rationalized this position, noting that, "An accommodative stance on monetary policy, coupled with robust underlying growth in productivity, is providing important ongoing support to economic activity." However, for the first time since August 2003, the statement contained no reference as to how long the Fed would be willing to keep rates low, other than to say that it "could be patient." This prompted many market participants to conclude that an increase in short-term rates was a likely possibility in the approaching months. Q. AGAINST THIS BACKDROP, HOW DID YOU MANAGE THE FUND'S PORTFOLIO? A. Throughout the reporting period, we continued to employ a "barbell" strategy, whereby we purchased securities at both ends of the maturity spectrum. The Portfolio's longer-term securities--with maturities up to one year--were used to lock in higher yields as interest rates fell, while shorter-term securities--typically one month or less in maturity--provided liquidity. This strategy was beneficial because it allowed us to generate incremental yield compared with a more "laddered" approach, wherein a portfolio is spread out among all maturity levels. As always, we focused on emphasizing quality and liquidity for the Portfolio. Most notably, this focus involved shifting more of the Portfolio's holdings into commercial paper, as spreads in these investments grew more attractive in the healthier credit environment that characterized the period. At period end, commercial paper was the largest position in the Portfolio. Q. WHAT IS YOUR OUTLOOK FOR THE ECONOMY, AND HOW DO YOU ANTICIPATE STRUCTURING THE FUND GOING FORWARD? A. Looking ahead, we are fairly positive with regard to growth prospects for the economy. However, the extent to which growth occurs could depend on a major contingency: Job growth. Although the economy appears to be on solid footing, it has not yet triggered a significant increase in jobs. With approximately 70% of the economy driven by the consumer, continued high unemployment could hurt consumer confidence and temper the economic expansion in 2004. Given the current environment, we expect to continue employing a barbell strategy in order to lock in higher rates. Maintaining a high-quality portfolio 2 <Page> will also be of paramount importance as we seek to meet our investment goal of providing current income consistent with preservation of capital and liquidity. As always, we appreciate the opportunity to help you achieve your financial goals. If you have any questions about UBS PACE Money Market Investments, please contact your financial advisor. Sincerely, /s/ Joseph A. Varnas JOSEPH A. VARNAS PRESIDENT UBS PACE Select Advisors Trust MANAGING DIRECTOR UBS Global Asset Management (US) Inc. /s/ Michael H. Markowitz MICHAEL H. MARKOWITZ PORTFOLIO MANAGER UBS PACE Money Market Investments MANAGING DIRECTOR UBS Global Asset Management (US) Inc. This letter is intended to assist shareholders in understanding how the Portfolio performed during the six-month period ended January 31, 2004, and reflects our views at the time of its writing. Of course, these views may change in response to changing circumstances, and they do not guarantee the future performance of the markets or the Portfolio. We encourage you to consult your financial advisor regarding your personal investment program. 3 <Page> PERFORMANCE AT A GLANCE (UNAUDITED) <Table> <Caption> AVERAGE ANNUAL TOTAL RETURNS SINCE FOR PERIODS ENDED 1/31/04 6 MONTHS 1 YEAR 5 YEARS INCEPTION# - --------------------------------------------------------------------------------- UBS PACE Money Market Investments without UBS PACE program fee* 0.25% 0.59% 3.30% 4.07% - --------------------------------------------------------------------------------- UBS PACE Money Market Investments with maximum UBS PACE program fee* -0.51 -0.91 1.76 2.52 - --------------------------------------------------------------------------------- 90-Day U.S. T-Bill Index** 0.48 1.04 3.43 4.15 - --------------------------------------------------------------------------------- Lipper Money Market Funds Median 0.17 0.43 3.05 3.86 - --------------------------------------------------------------------------------- </Table> Average annual total returns for UBS PACE Money Market Investments, for periods ended December 31, 2003, after deduction of the maximum UBS PACE program fee, were as follows: 1-year period, -0.88%; 5-year period, 1.83%; since inception, 2.55%. For UBS PACE Money Market Investments, the 7-day current yield for the period ended January 31, 2004 was 0.50%, without the UBS PACE program fee. With the maximum UBS PACE program fee, the 7-day current yield was -1.00%. The Portfolio's yield quotation more closely reflects the current earnings of the Portfolio than the total return quotation. Yields will fluctuate and reflect any fee waivers. # Since inception returns are calculated as of commencement of issuance on August 24, 1995 for UBS PACE Money Market Investments. Inception returns for the Index and Lipper median are as of the nearest month-end of the Portfolio's inception: August 31, 1995. * The maximum annual UBS PACE program fee is 1.5% of the value of UBS PACE assets. ** 90-Day US T-Bills are promissory notes issued by the US Treasury and sold through competitive bidding, with a short-term maturity date, in this case, of three months. This Index is derived from secondary market interest rates as published by the Federal Reserve Bank. Past performance does not predict future performance and the performance information provided does not reflect the deduction of taxes that a shareholder would pay on Portfolio distributions. The return and principal value of an investment will fluctuate, so that an investor's shares, when redeemed, may be worth more or less than their original cost. Performance results assume reinvestment of all dividends and capital gain distributions. Total returns for periods of less than one year have not been annualized. Lipper peer group data calculated by Lipper Inc.; used with permission. The Lipper median is the return of the fund that places in the middle of a Lipper peer group. An investment in UBS PACE Money Market Investments is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Although the Portfolio seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Portfolio. 4 <Page> PORTFOLIO STATISTICS <Table> <Caption> CHARACTERISTICS 1/31/04 - -------------------------------------------------------------------------------- Net Assets (mm) $ 129.9 Number of issuers (excluding Governments) 50 - -------------------------------------------------------------------------------- Weighted Average Maturity 52 days - -------------------------------------------------------------------------------- <Caption> PORTFOLIO COMPOSITION* 1/31/04 - -------------------------------------------------------------------------------- Commercial Paper 64.3% - -------------------------------------------------------------------------------- U.S. Government and Agency Obligations 16.6 - -------------------------------------------------------------------------------- Bank Obligations 15.0 - -------------------------------------------------------------------------------- Short-Term Corporate Obligations 3.1 - -------------------------------------------------------------------------------- Money Market Funds 1.3 - -------------------------------------------------------------------------------- Liabilities in Excess of Other Assets (0.3) - -------------------------------------------------------------------------------- TOTAL 100.0% - -------------------------------------------------------------------------------- <Caption> TOP 10 HOLDINGS (EXCLUDING U.S. GOVERNMENT AND AGENCY OBLIGATIONS)* 1/31/04 - -------------------------------------------------------------------------------- Giro Multi-Funding 3.2% - -------------------------------------------------------------------------------- SunTrust Bank 2.3 - -------------------------------------------------------------------------------- Wells Fargo Bank 2.3 - -------------------------------------------------------------------------------- Variable Funding Capital 2.3 - -------------------------------------------------------------------------------- RWE 2.3 - -------------------------------------------------------------------------------- Giro Funding U.S. 2.3 - -------------------------------------------------------------------------------- Receivables Capital 2.3 - -------------------------------------------------------------------------------- Triple A One Funding 2.3 - -------------------------------------------------------------------------------- Bank of America 2.3 - -------------------------------------------------------------------------------- Old Line Funding 2.3 - -------------------------------------------------------------------------------- TOTAL 23.9% - -------------------------------------------------------------------------------- </Table> * Weightings represent percentages of net assets as of January 31, 2004. The Portfolio is actively managed and its composition will vary over time. 5 <Page> UBS PACE MONEY MARKET INVESTMENTS STATEMENT OF NET ASSETS -- JANUARY 31, 2004 (UNAUDITED) <Table> <Caption> PRINCIPAL AMOUNT MATURITY INTEREST (000) DATES RATES VALUE - ------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS--16.57% 02/05/04 to 0.930 to $ 8,000 U.S. Treasury Bills 04/22/04 1.000%@ $ 7,990,587 1,530 Federal Farm Credit Bank 03/17/04 1.100@ 1,527,896 07/06/04 to 1.070 to 6,500 Federal Home Loan Bank 12/03/04 1.450 6,500,000 09/13/04 to 1.350 to 5,500 Federal Home Loan Mortgage Corp. 11/16/04 1.400 5,500,000 Total U.S. Government and Agency Obligations (cost--$21,518,483) 21,518,483 - ------------------------------------------------------------------------------------------------------- BANK NOTE-U.S.--2.31% 3,000 Wells Fargo Bank NA (cost--$3,000,000) 02/02/04 1.030* 3,000,000 - ------------------------------------------------------------------------------------------------------- CERTIFICATES OF DEPOSIT--12.63% NON-U.S.--7.47% 2,000 Abbey National Treasury Services PLC 02/02/04 1.025* 1,999,894 2,000 Deutsche Bank AG 04/08/04 1.070 2,000,000 1,500 Fortis Bank NV 02/13/04 1.040* 1,499,608 2,200 Natexis Banque Populaires 04/06/04 1.070 2,200,000 2,000 Westdeutsche Landesbank AG 02/02/04 1.050* 1,999,980 9,699,482 U.S.--5.16% 1,000 American Express Centurion Bank 02/18/04 1.020 1,000,000 2,700 First Tennessee Bank N.A. 03/12/04 1.030 2,700,000 3,000 SunTrust Bank 02/02/04 1.060* 3,000,000 6,700,000 Total Certificates of Deposit (cost--$16,399,482) 16,399,482 - ------------------------------------------------------------------------------------------------------- COMMERCIAL PAPER@--64.34% ASSET BACKED-AUTO & TRUCK--2.31% 3,000 New Center Asset Trust 03/22/04 1.080 2,995,500 ASSET BACKED-BANKING--1.88% 2,440 Atlantis One Funding Corp. 03/08/04 1.090 2,437,340 ASSET BACKED-FINANCE--1.18% 1,538 K2 (USA) LLC 02/27/04 1.100 1,536,778 </Table> 6 <Page> <Table> <Caption> PRINCIPAL AMOUNT MATURITY INTEREST (000) DATES RATES VALUE - ------------------------------------------------------------------------------------------------------- COMMERCIAL PAPER@--(CONTINUED) ASSET BACKED-MISCELLANEOUS--22.81% $ 2,000 Falcon Asset Securitization Corp. 03/01/04 1.040% $ 1,998,324 2,460 Galaxy Funding, Inc. 04/07/04 1.110 2,454,994 3,000 Giro Funding U.S. Corp. 02/18/04 1.030 2,998,541 02/09/04 to 1.030 to 4,187 Giro Multi-Funding Corp. 02/17/04 1.090 4,185,275 3,000 Old Line Funding Corp. 02/26/04 1.020 2,997,875 3,000 Preferred Receivables Funding Corp. 02/27/04 1.020 2,997,790 3,000 Receivables Capital Corp. 02/20/04 1.030 2,998,369 3,000 Thunderbay Funding 03/02/04 1.030 2,997,425 3,000 Triple A One Funding 02/20/04 1.030 2,998,369 3,000 Variable Funding Capital Corp. 02/06/04 1.040 2,999,567 29,626,529 BANKING-NON-U.S.--10.92% 1,500 Alliance & Leicester PLC 03/12/04 1.080 1,498,200 1,400 Den Norske Bank ASA 04/06/04 1.050 1,397,346 3,000 Depfa Bank PLC 03/12/04 1.100 2,996,333 02/10/04 to 1.040 to 2,000 HBOS Treasury Services PLC 04/14/04 1.070 1,997,624 3,000 Nationwide Building Society 04/05/04 1.040 2,994,453 1,300 Royal Bank of Scotland PLC 02/12/04 1.010 1,299,599 2,000 Westpac Trust Securities NZ Ltd. 04/08/04 1.050 1,996,092 14,179,647 BANKING-U.S.--17.89% 3,000 Bank of America Corp. 02/26/04 1.020 2,997,875 2,300 Danske Corp. 02/09/04 1.010 2,299,484 3,000 Dexia Delaware LLC 04/15/04 1.030 2,993,648 2,500 ING (US) Funding LLC 05/03/04 1.040 2,493,356 3,000 Nordea North America, Inc. 03/18/04 1.080 2,995,860 3,000 Societe Generale North America, Inc. 03/18/04 1.080 2,995,860 2,623 Toronto-Dominion Holdings USA, Inc. 03/08/04 1.085 2,620,154 1,550 UniCredito Delaware, Inc. 02/06/04 1.100 1,549,763 2,290 Westpac Capital Corp. 04/07/04 1.100 2,285,382 23,231,382 </Table> 7 <Page> <Table> <Caption> PRINCIPAL AMOUNT MATURITY INTEREST (000) DATES RATES VALUE - ------------------------------------------------------------------------------------------------------- COMMERCIAL PAPER@--(CONCLUDED) BROKERAGE--2.31% $ 3,000 Citigroup Global Markets Holdings, Inc. 04/01/04 1.040% $ 2,994,800 FINANCE-NONCAPTIVE DIVERSIFIED--1.77% 2,300 International Lease Finance Corp. 02/02/04 1.010 2,299,935 PHARMACEUTICALS--0.96% 1,250 Aventis SA 02/18/04 1.020 1,249,398 UTILITIES-OTHER--2.31% 3,000 RWE AG 02/17/04 1.090 2,998,547 Total Commercial Paper (cost--$83,549,856) 83,549,856 - ------------------------------------------------------------------------------------------------------- SHORT-TERM CORPORATE OBLIGATIONS--3.08% ENERGY-INTEGRATED--1.54% 2,000 BP Capital Markets PLC 02/02/04 1.045* 2,000,000 FINANCE-NONCAPTIVE DIVERSIFIED--1.54% 2,000 General Electric Capital Corp. 02/09/04 1.190* 2,000,000 Total Short-Term Corporate Obligations (cost--$4,000,000) 4,000,000 - ------------------------------------------------------------------------------------------------------- <Caption> NUMBER OF SHARES (000) - --------- MONEY MARKET FUNDS+--1.34% 16 AIM Liquid Assets Portfolio 02/02/04 0.960 16,398 1,730 BlackRock Provident Institutional TempFund 02/02/04 0.926 1,729,673 Total Money Market Funds (cost--$1,746,071) 1,746,071 - ------------------------------------------------------------------------------------------------------- Total Investments (cost--$130,213,892)--100.27% 130,213,892 Liabilities in excess of other assets--(0.27)% (353,209) Net Assets (applicable to 129,860,858 shares of beneficial interest outstanding equivalent to $1.00 per share)--100.00% $ 129,860,683 - ------------------------------------------------------------------------------------------------------- </Table> * Variable rate securities--maturity dates reflect earlier of reset date or stated maturity date. The interest rates shown are the current rates as of January 31, 2004, and reset periodically. @ Interest rates shown are the discount rates at date of purchase. + Interest rates shown reflect yield at January 31, 2004. Weighted average maturity -- 52 days See accompanying notes to financial statements 8 <Page> UBS PACE MONEY MARKET INVESTMENTS STATEMENT OF OPERATIONS <Table> <Caption> FOR THE SIX MONTHS ENDED JANUARY 31, 2004 (UNAUDITED) - ----------------------------------------------------------------------------------------------- INVESTMENT INCOME: Interest $ 707,333 EXPENSES: Transfer agency and related services fees 260,202 Investment management and administration fees 227,677 Reports and notices to shareholders 78,839 Professional fees 21,184 Federal and state registration fees 15,959 Custody and accounting 6,505 Trustees' fees 2,591 Other expenses 7,074 620,031 Less: Fee waivers and expense reimbursements from investment manager and administrator (229,727) Net expenses 390,304 Net investment income 317,029 Net realized gain from investment activities 17 Net increase in net assets resulting from operations $ 317,046 - --------------------------------------------------------------------------------------------- </Table> STATEMENT OF CHANGES IN NET ASSETS <Table> <Caption> FOR THE SIX MONTHS ENDED FOR THE JANUARY 31, 2004 YEAR ENDED (UNAUDITED) JULY 31, 2003 - --------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income $ 317,029 $ 1,175,404 Net realized gains from investment activities 17 28 Net increase in net assets resulting from operations 317,046 1,175,432 DIVIDENDS TO SHAREHOLDERS FROM: Net investment income (317,029) (1,175,404) FROM BENEFICIAL INTEREST TRANSACTIONS: Net increase in net assets from beneficial interest transactions 5,946,014 11,913,188 Net increase in net assets 5,946,031 11,913,216 NET ASSETS: Beginning of period 123,914,652 112,001,436 End of period $ 129,860,683 $ 123,914,652 - --------------------------------------------------------------------------------------------- </Table> See accompanying notes to financial statements 9 <Page> UBS PACE MONEY MARKET INVESTMENTS NOTES TO FINANCIAL STATEMENTS (UNAUDITED) ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES UBS PACE Money Market Investments (the "Portfolio") is a diversified portfolio of UBS PACE Select Advisors Trust (the "Trust"), which was organized as a Delaware statutory trust under the laws of the State of Delaware by Certificate of Trust dated September 9, 1994, as amended June 9, 1995, and is registered with the Securities and Exchange Commission under the Investment Company Act of 1940, as amended, as an open-end management investment company. The trustees of the Trust have authority to issue an unlimited number of shares of beneficial interest, par value $0.001 per share. The Trust currently offers twelve portfolios available for investment, each having its own investment objectives and policies. Shares of the Portfolio currently are available only to participants in the UBS PACE(SM) Select Advisors Program and the UBS PACE(SM) Multi Advisor Program. The Trust accounts separately for the assets, liabilities and operations for each portfolio. Expenses directly attributable to each portfolio are charged to that portfolio's operations; expenses which are applicable to all portfolios are allocated among them on a pro rata basis. The preparation of financial statements in accordance with accounting principles generally accepted in the United States requires the Portfolio's management to make estimates and assumptions that affect the reported amounts and disclosures in the financial statements. Actual results could differ from those estimates. The following is a summary of significant accounting policies: VALUATION AND ACCOUNTING FOR INVESTMENTS AND INVESTMENT INCOME--Investments are valued at amortized cost which approximates market value, unless the Trust's Board of Trustees (the "Board") determines that this does not represent fair value. Investment transactions are recorded on the trade date. Realized gains and losses from investment transactions are calculated using the identified cost method. Interest income is recorded on an accrual basis. Discounts are accreted and premiums are amortized as adjustments to interest income and the identified cost of investments. REPURCHASE AGREEMENTS--The Portfolio may purchase securities or other obligations from a bank or securities dealer (or its affiliate), subject to the seller's agreement to repurchase them at an agreed upon date (or upon demand) and price. The Portfolio maintains custody of the underlying obligations prior to their repurchase, either through its regular custodian or through a special "tri-party" custodian or sub-custodian that maintains a separate account for both the Portfolio and its counterparty. The underlying collateral is valued daily on a mark-to-market basis to ensure that the value, including accrued interest, is at least equal to the repurchase price. In the event of default of the obligation to 10 <Page> repurchase, the Portfolio generally has the right to liquidate the collateral and apply the proceeds in satisfaction of the obligation. Repurchase agreements involving obligations other than U.S. government securities (such as commercial paper, corporate bonds and mortgage loans) may be subject to special risks and may not have the benefit of certain protections in the event of counterparty insolvency. If the seller (or seller's guarantor, if any) becomes insolvent, the Portfolio may suffer delays, costs and possible losses in connection with the disposition or retention of the collateral. Under certain circumstances, in the event of default or bankruptcy by the other party to the agreement, realization and/or retention of the collateral may be subject to legal proceedings. The Portfolio may participate in joint repurchase agreement transactions with other funds managed, advised or sub-advised by UBS Global Asset Management (US) Inc. ("UBS Global AM"), the investment manager and administrator of the Portfolio. UBS Global AM is an indirect wholly owned asset management subsidiary of UBS AG, an international diversified organization with headquarters in Zurich, Switzerland and operations in many areas of the financial services industry. DIVIDENDS AND DISTRIBUTIONS--Dividends and distributions to shareholders are recorded on the ex-dividend date. The amount of dividends and distributions is determined in accordance with federal income tax regulations, which may differ from accounting principles generally accepted in the United States. These "book/tax" differences are either considered temporary or permanent in nature. To the extent these differences are permanent in nature, such amounts are reclassified within the capital accounts based on their federal tax-basis treatment; temporary differences do not require reclassification. CONCENTRATION OF RISK The ability of the issuers of debt securities held by the Portfolio to meet their obligations may be affected by economic developments, including those particular to a specific industry or region. INVESTMENT MANAGER AND ADMINISTRATOR The Board has approved an Investment Management and Administration Contract ("Management Contract") with UBS Global AM. In accordance with the Management Contract, the Portfolio pays UBS Global AM an investment management and administration fee, which is accrued daily and paid monthly, at an annual rate of 0.35% of the Portfolio's average daily net assets. At January 31, 2004, the Portfolio owed UBS Global AM $38,908 for investment management and administration fees. Effective December 1, 2003, UBS Global AM has contractually undertaken to waive a portion of the Portfolio's investment management and administration fees and reimburse a portion of the Portfolio's other expenses, when necessary, 11 <Page> to maintain the total annual operating expenses at a level not exceeding 0.60%. The Portfolio will reimburse UBS Global AM for any such payments during a three year period to the extent that operating expenses are otherwise below the expense caps. For the six months ended January 31, 2004, UBS Global AM agreed to waive $227,677 of its investment management and administration fees and reimburse the Portfolio $2,050 for certain operating expenses. At January 31, 2004, UBS Global AM owed the Portfolio $35,729 for fee waivers. At January 31, 2004, the Portfolio had fee waivers/expense reimbursements subject to repayment and respective dates of expirations as follows: <Table> <Caption> FEE WAIVERS/EXPENSE EXPIRES EXPIRES EXPIRES EXPIRES REIMBURSEMENTS JULY 31, JULY 31, JULY 31, JULY 31, SUBJECT TO REPAYMENT 2004 2005 2006 2007 - -------------------------------------------------------------------- $ 2,163,688 $ 375,953 $ 854,351 $ 703,657 $ 229,727 - -------------------------------------------------------------------- </Table> OTHER LIABILITIES AND COMPONENTS OF NET ASSETS At January 31, 2004, dividends payable, payable for shares of beneficial interest repurchased and other accrued expenses (excluding investment management and administration fees) were $32,627, $1,025,908, and $221,842, respectively. At January 31, 2004, the Portfolio had the following components of net assets: paid in capital of $129,860,858 and accumulated net realized loss of $175 for total net assets of $129,860,683. FEDERAL TAX STATUS The Portfolio intends to distribute all of its income and to comply with the other requirements of the Internal Revenue Code applicable to regulated investment companies. Accordingly, no provision for federal income taxes is required. In addition, by distributing during each calendar year substantially all net investment income, realized capital gains and certain other amounts, if any, the Portfolio intends not to be subject to federal excise tax. The tax character of distributions paid to shareholders during the six months ended January 31, 2004 and the fiscal year ended July 31, 2003 was ordinary income. The components of accumulated earnings on a tax basis for the current period will be calculated after the Portfolio's fiscal year ending July 31, 2004. At July 31, 2003, the Portfolio had a net capital loss carryforward of $192. This loss carryforward is available as a reduction, to the extent provided in the regulations, of any future net realized capital gains, and will expire by July 31, 2007. To the extent that such losses are used to offset future realized capital gains, it is probable that the realized capital gains so offset will not be distributed. 12 <Page> SHARES OF BENEFICIAL INTEREST There is an unlimited amount of $0.001 par value shares of beneficial interest authorized. Transactions in shares of beneficial interest, at $1.00 per share, were as follows: <Table> <Caption> FOR THE SIX FOR THE MONTHS ENDED YEAR ENDED JANUARY 31, 2004 JULY 31, 2003 - ---------------------------------------------------------------------------- Shares sold 77,326,467 184,782,987 Shares repurchased (71,679,933) (174,057,834) Dividends reinvested 299,480 1,188,035 Net increase in shares outstanding 5,946,014 11,913,188 - ---------------------------------------------------------------------------- </Table> 13 <Page> UBS PACE MONEY MARKET INVESTMENTS FINANCIAL HIGHLIGHTS Selected data for a share of beneficial interest outstanding throughout each period is presented below: <Table> <Caption> FOR THE SIX MONTHS ENDED FOR THE YEARS ENDED JULY 31, JANUARY 31, 2004 --------------------------------------------------------- (UNAUDITED) 2003 2002 2001 2000 1999 - -------------------------------------------------------------------------------------------------------------- NET ASSET VALUE, BEGINNING OF PERIOD $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 Net investment income 0.002 0.009 0.021 0.053 0.054 0.047 Dividends from net investment income (0.002) (0.009) (0.021) (0.053) (0.054) (0.047) NET ASSET VALUE, END OF PERIOD $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 TOTAL INVESTMENT RETURN(1) 0.25% 0.96% 2.10% 5.44% 5.53% 4.85% RATIOS/SUPPLEMENTAL DATA: Net assets, end of period (000's) $ 129,861 $ 123,915 $ 112,001 $ 76,657 $ 65,521 $ 47,174 Expenses to average net assets, net of fee waivers and expense reimbursements 0.60%* 0.57% 0.50% 0.50% 0.50% 0.50% Expenses to average net assets, before fee waivers and expense reimbursements 0.95%* 1.13% 1.43% 1.00% 0.95% 1.07% Net investment income to average net assets, net of fee waivers and expense reimbursements 0.48%* 0.94% 2.03% 5.26% 5.46% 4.70% Net investment income to average net assets, before fee waivers and expense reimbursements 0.13%* 0.38% 1.10% 4.76% 5.01% 4.13% - -------------------------------------------------------------------------------------------------------------- </Table> * Annualized. (1) Total investment return is calculated assuming a $10,000 investment on the first day of each period reported, reinvestment of all dividends and other distributions, if any, at net asset value on the payable dates, and a sale at net asset value on the last day of each period reported. Total investment return for a period of less than one year has not been annualized. The figures do not include program fees; results would be lower if this fee was included. Returns do not reflect the deduction of taxes that a shareholder would pay on Portfolio distributions. 14 <Page> TRUSTEES Brian M. Storms Richard R. Burt CHAIRMAN Meyer Feldberg Carl W. Schafer Margo N. Alexander William D. White Richard Q. Armstrong David J. Beaubien PRINCIPAL OFFICERS Joseph A. Varnas Michael H. Markowitz PRESIDENT VICE PRESIDENT Amy R. Doberman W. Douglas Beck VICE PRESIDENT AND SECRETARY VICE PRESIDENT Paul H. Schubert VICE PRESIDENT AND TREASURER INVESTMENT MANAGER, ADMINISTRATOR AND PRINCIPAL UNDERWRITER UBS Global Asset Management (US) Inc. 51 West 52nd Street New York, New York 10019-6114 THE FINANCIAL INFORMATION INCLUDED HEREIN IS TAKEN FROM THE RECORDS OF THE PORTFOLIO WITHOUT EXAMINATION BY INDEPENDENT AUDITORS WHO DO NOT EXPRESS AN OPINION THEREON. THIS REPORT IS NOT TO BE USED IN CONNECTION WITH THE OFFERING OF SHARES OF THE PORTFOLIO UNLESS ACCOMPANIED OR PRECEDED BY AN EFFECTIVE PROSPECTUS. (C)2004 UBS Global Asset Management (US) Inc. All rights reserved. <Page> Presorted [UBS LOGO] Standard U.S. Postage PAID Smithtown, NY Permit 700 UBS GLOBAL ASSET MANAGEMENT (US) INC. 51 West 52nd Street New York, New York 10019 <Page> ITEM 2. CODE OF ETHICS. Form N-CSR disclosure requirement not applicable to this filing of a semi-annual report. ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. Form N-CSR disclosure requirement not applicable to this filing of a semi-annual report. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. Form N-CSR disclosure requirement not applicable to this filing of a semi-annual report. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS. Not applicable to the registrant. ITEM 6. [RESERVED BY SEC FOR FUTURE USE. ] ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. Not applicable to the registrant. ITEM 8. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS. Not applicable to the registrant. ITEM 9. CONTROLS AND PROCEDURES. (a) The registrant's principal executive officer and principal financial officer have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended) are effective based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of this document. <Page> (b) The registrant's principal executive officer and principal financial officer are aware of no changes in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal half-year that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. ITEM 10. EXHIBITS. (a) (1) Code of Ethics - Form N-CSR disclosure requirement not applicable to this filing of a semi-annual report. (a) (2) Certifications of principal executive officer and principal financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 is attached hereto as Exhibit EX-99.CERT. (b) Certifications of principal executive officer and principal financial officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 is attached hereto as Exhibit EX-99.906CERT. <Page> 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. UBS PACE Select Advisors Trust By: /s/ Joseph A. Varnas -------------------- Joseph A. Varnas President Date: April 8, 2004 ------------- 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: /s/ Joseph A. Varnas -------------------- Joseph A. Varnas President Date: April 8, 2004 ------------- By: /s/ Paul H. Schubert -------------------- Paul H. Schubert Treasurer Date: April 8, 2004 -------------