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United States

Institutional Investors
UBS Select 100% US Treasury Preferred Class P Fund (STAXX) UBS Select 100% US Treasury Preferred Class T Fund (SOPXX) UBS Select 100% US Treasury Institutional Fund (SIOXX) UBS Select Government Preferred Fund (SGPXX) UBS Select Government Institutional Fund (SEGXX) UBS RMA Government Money Market Fund (RMGXX) UBS Liquid Assets Government Fund UBS Government Money Market Investments Fund (PCEXX) UBS Select Treasury Preferred Fund (STPXX) UBS Select Treasury Institutional Fund (SETXX)
Individual Investors
UBS Select 100% US Treasury Preferred Class P Fund (STAXX) UBS Select 100% US Treasury Preferred Class T Fund (SOPXX) UBS Select 100% US Treasury Institutional Fund (SIOXX) UBS Prime Preferred Fund (UPPXX) UBS Prime Reserves Fund (UPRXX) UBS Select Government Preferred Fund (SGPXX) UBS Select Government Institutional Fund (SEGXX) UBS RMA Government Money Market Fund (RMGXX) UBS Liquid Assets Government Fund UBS Government Money Market Investments Fund (PCEXX) UBS Tax-Free Preferred Fund (SFPXX) UBS Tax-Free Reserves Fund (STFXX) UBS Select Treasury Preferred Fund (STPXX) UBS Select Treasury Institutional Fund (SETXX)
Master Trust
Prime CNAV Master Fund Government Master Fund Tax-Free Master Fund Treasury Master Fund 100% US Treasury Master Fund
Documents - All Funds
Tailored Shareholder Reports
US Money Market Reform Information
Daily Yields
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United States

Institutional Investors
UBS Select 100% US Treasury Preferred Class P Fund (STAXX) UBS Select 100% US Treasury Preferred Class T Fund (SOPXX) UBS Select 100% US Treasury Institutional Fund (SIOXX) UBS Select Government Preferred Fund (SGPXX) UBS Select Government Institutional Fund (SEGXX) UBS RMA Government Money Market Fund (RMGXX) UBS Liquid Assets Government Fund UBS Government Money Market Investments Fund (PCEXX) UBS Select Treasury Preferred Fund (STPXX) UBS Select Treasury Institutional Fund (SETXX)
Individual Investors
UBS Select 100% US Treasury Preferred Class P Fund (STAXX) UBS Select 100% US Treasury Preferred Class T Fund (SOPXX) UBS Select 100% US Treasury Institutional Fund (SIOXX) UBS Prime Preferred Fund (UPPXX) UBS Prime Reserves Fund (UPRXX) UBS Select Government Preferred Fund (SGPXX) UBS Select Government Institutional Fund (SEGXX) UBS RMA Government Money Market Fund (RMGXX) UBS Liquid Assets Government Fund UBS Government Money Market Investments Fund (PCEXX) UBS Tax-Free Preferred Fund (SFPXX) UBS Tax-Free Reserves Fund (STFXX) UBS Select Treasury Preferred Fund (STPXX) UBS Select Treasury Institutional Fund (SETXX)
Master Trust
Prime CNAV Master Fund Government Master Fund Tax-Free Master Fund Treasury Master Fund 100% US Treasury Master Fund
Documents - All Funds
Tailored Shareholder Reports
US Money Market Reform Information
Daily Yields

UBS Select Prime Preferred Fund (SPPXX)

Fund Information - Daily Liquid Assets Weekly Liquid Assets Daily Net Inflows/Outflows Six-Month Historical NAV Documents

Six-Month Historical NAV1

in USD

1The "Six-Month Historical NAV" graph above reflects the following: for the period prior to October 11, 2016, the fund's net asset value per share calculated based on market factors (during such periods, the fund priced its shares for transactional purposes at a stable $1.00 per share using the amortized cost method as permitted by SEC regulations); and for periods beginning October 11, 2016, the fund's last daily calculation of its net asset value per share based on market factors and used for transactional purposes (that is, its floating share price). As a result of Federal changes to the regulations governing money market funds, the fund transitioned from a stable $1.00 net asset value per share to a floating share price on October 11, 2016.

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* The UBS Select Prime Funds merged into the UBS Prime Funds effective as of August 23, 2024. The historical information provided for UBS Select Prime Funds is for informational purposes and is expected to be deleted from this website in March 2025.

For UBS Prime Funds and UBS Tax-Free Funds
You could lose money by investing in the Fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. The Fund may impose a fee upon the sale of your shares under certain circumstances or, until October 2, 2023, may temporarily suspend your ability to sell shares if the Fund’s liquidity falls below a required minimum because of market conditions or other factors. An investment in the Fund is not a bank account and not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The Fund’s sponsor is not required to reimburse the Fund for losses, and you should not expect that the sponsor will provide financial support to the Fund at any time, including during periods of market stress.

For UBS Select Government Funds and UBS Select Treasury Funds and 100% US Treasury Fund
You could lose money by investing in the Fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. An investment in the Fund is not a bank account and not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The Fund’s sponsor is not required to reimburse the Fund for losses, and you should not expect that the sponsor will provide financial support to the Fund at any time, including during periods of market stress.

Not FDIC Insured. May lose value. No bank guarantee.

UBS Asset Management (US) Inc. is each money market fund's distributor.