VMFXX - Vanguard Federal Money Market Fund
7-day yield, assets, and how it ranks - from the September 2026 month-end N-MFP filing.
Data: September 2026 month-end SEC filings
All figures are from the September 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 (September 2026 month-end), VMFXX (Vanguard Federal Money Market Fund) has a 7-day net yield of 3.79%.
- VMFXX's 7-day yield ranks #102 of 886 US money-market fund ticker share classes reporting a yield for September 2026.
- VMFXX is a Government money-market fund share class with $376.8B in net assets (#2 of 886 ticker classes by size).
- The fund's series-level 7-day gross yield was 3.90% - the 0.11-point gap to this class's net yield reflects fund expenses.
- At September 2026 month-end the fund's portfolio had a weighted average maturity (WAM) of 22 days and a weighted average life (WAL) of 49 days, with 55.3% of assets in daily liquid assets and 67.8% in weekly liquid assets (SEC minimums: 25% daily, 50% weekly).
- Twelve months earlier (September 2025) VMFXX's 7-day yield was 4.08% - it has moved down 0.29 points over the year.
- VMFXX's highest month-end 7-day yield in the SEC's structured data (since April 2016) is 5.31%, reported for December 2023.
Yield history
Portfolio (series level)
Compare
VMFXX vs SPAXX · VMFXX vs SWVXX · VMFXX vs VUSXX · VMRXX vs VMFXX · VMFXX vs VMSXX · VMFXX vs FDLXX · VMFXX vs SNSXX · VMFXX vs SPRXX · VMFXX vs FDRXX · VMFXX vs FZFXX · VMFXX vs SNVXX · VMFXX vs SNOXX · VMFXX vs FZDXX · VMFXX vs SNAXX · VMFXX vs SWOXX · VMFXX vs TSCXX · VMFXX vs GABXX
Fund context & source
Vanguard Federal Money Market Fund is a series of Vanguard Money Market Reserves (SEC series ID S000004462). The whole series held $376.8B across all share classes at September 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 Vanguard. Verify the filing itself on EDGAR: N-MFP filings for this series.
State-tax note (2025 tax year)
Vanguard reports that 66.61% of VMFXX's 2025 dividend income came from US government obligations - the portion most states exempt from income tax. The fund met the 50%-of-assets test that California, Connecticut, and New York require (source). Figures change each tax year. Full table and calculator: tax-equivalent yield.
FAQ
What is VMFXX's 7-day yield?
As of the September 2026 month-end SEC Form N-MFP filing (September 30, 2026), VMFXX (Vanguard Federal Money Market Fund) has a 7-day net yield of 3.79%.
Is VMFXX a government money market fund?
Yes - VMFXX is classified as a Government money-market fund in its own September 2026 Form N-MFP filing.
What is the minimum initial investment for VMFXX?
VMFXX reports a minimum initial investment of $3,000 on its September 2026 Form N-MFP filing.