FZDXX - Fidelity 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), FZDXX (Fidelity Money Market Fund) has a 7-day net yield of 3.68%.
- FZDXX's 7-day yield ranks #324 of 886 US money-market fund ticker share classes reporting a yield for September 2026.
- FZDXX is a Prime money-market fund share class with $121.1B in net assets (#14 of 886 ticker classes by size).
- The fund's series-level 7-day gross yield was 3.98% - the 0.30-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 14 days and a weighted average life (WAL) of 24 days, with 63.0% of assets in daily liquid assets and 78.0% in weekly liquid assets (SEC minimums: 25% daily, 50% weekly).
- Twelve months earlier (September 2025) FZDXX's 7-day yield was 3.97% - it has moved down 0.29 points over the year.
- FZDXX's highest month-end 7-day yield in the SEC's structured data (since April 2016) is 5.22%, reported for December 2023.
Yield history
Portfolio (series level)
Other share classes of this fund
| Class | Ticker | 7-day yield | Net assets | Min. investment |
|---|---|---|---|---|
| Fidelity Money Market Fund | SPRXX | 3.56% | $11.7B | None |
Compare
SWVXX vs FZDXX · SPRXX vs FZDXX · SPAXX vs FZDXX · VMFXX vs FZDXX · FDLXX vs FZDXX · SNSXX vs FZDXX · VMRXX vs FZDXX · FDRXX vs FZDXX · VUSXX vs FZDXX · FZFXX vs FZDXX · SNVXX vs FZDXX · SNOXX vs FZDXX · FZDXX vs SNAXX · FZDXX vs VMSXX · FZDXX vs SWOXX · FZDXX vs TSCXX · FZDXX vs GABXX
Fund context & source
Fidelity Money Market Fund is a series of Fidelity Hereford Street Trust (SEC series ID S000007052). The whole series held $132.9B 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 Fidelity. Verify the filing itself on EDGAR: N-MFP filings for this series.
FAQ
What is FZDXX's 7-day yield?
As of the September 2026 month-end SEC Form N-MFP filing (September 30, 2026), FZDXX (Fidelity Money Market Fund) has a 7-day net yield of 3.68%.
Is FZDXX a government money market fund?
No - FZDXX is classified as a Prime money-market fund in its own September 2026 Form N-MFP filing.
What is the minimum initial investment for FZDXX?
FZDXX reports a minimum initial investment of $100,000 on its September 2026 Form N-MFP filing.