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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 Select Treasury Preferred Fund (STPXX) UBS Select Treasury Institutional Fund (SETXX)
Master Trust
Prime CNAV Master Fund Government 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 Select Treasury Preferred Fund (STPXX) UBS Select Treasury Institutional Fund (SETXX)
Master Trust
Prime CNAV Master Fund Government 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

Weekly Liquid Assets1

% of Fund's total assets

1"Weekly liquid assets" is a term defined in US SEC Rule 2a-7 (which governs money market funds) and includes cash, direct obligations of the US government, certain securities issued by US government instrumentalities with a remaining maturity date of 60 days or less, and securities that mature or are subject to a demand feature exercisable and payable within five business days.

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* The UBS Tax-Free Funds were liquidated on December 13, 2024. The historical information provided for UBS Tax-Free Funds is for informational purposes and be deleted from this website later in 2025.

* 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
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.