SIOXX - UBS Select 100% US Treasury Institutional Fund
7-day yield, assets, and how it ranks - from the October 2026 month-end N-MFP filing.
Data: October 2026 month-end SEC filings
All figures are from the October 2026 month-end Form N-MFP filings (report date ) - money-market funds must file within five business days of month-end. Regulatory data, not live quotes.
- As of the Form N-MFP filing (October 2026 month-end), SIOXX (UBS Select 100% US Treasury Institutional Fund) has a 7-day net yield of 3.82%.
- SIOXX's 7-day yield ranks #222 of 885 US money-market fund ticker share classes reporting a yield for October 2026.
- SIOXX is a Government money-market fund share class with $8.3B in net assets (#131 of 885 ticker classes by size).
- The fund's series-level 7-day gross yield was 4.00% - the 0.18-point gap to this class's net yield reflects fund expenses.
- At October 2026 month-end the fund's portfolio had a weighted average maturity (WAM) of 1 days and a weighted average life (WAL) of 1 days, with 99.9% of assets in daily liquid assets and 99.9% in weekly liquid assets (SEC minimums: 25% daily, 50% weekly).
- Twelve months earlier (October 2025) SIOXX's 7-day yield was 3.87% - it has moved down 0.05 points over the year.
- SIOXX's highest month-end 7-day yield in the SEC's structured data (since April 2016) is 5.18%, reported for March 2024.
Yield history
Portfolio (series level)
Other share classes of this fund
| Class | Ticker | 7-day yield | Net assets | Min. investment |
|---|---|---|---|---|
| Token-Enabled Shares | TOKXX | 3.82% | $101,855 | None |
Fund context & source
UBS Select 100% US Treasury Institutional Fund is a series of UBS Series Funds (SEC series ID S000084282). The whole series held $8.3B across all share classes at October 2026 month-end.
This page shows the class's month-end regulatory filing, not a live quote - 7-day yields move daily. For today's yield, check UBS Asset Management. Verify the filing itself on EDGAR: N-MFP filings for this series.
FAQ
What is SIOXX's 7-day yield?
As of the October 2026 month-end SEC Form N-MFP filing (October 30, 2026), SIOXX (UBS Select 100% US Treasury Institutional Fund) has a 7-day net yield of 3.82%.
Is SIOXX a government money market fund?
Yes - SIOXX is classified as a Government money-market fund in its own October 2026 Form N-MFP filing.
What is the minimum initial investment for SIOXX?
SIOXX reports a minimum initial investment of None on its October 2026 Form N-MFP filing.