FDLXX - Fidelity Treasury Only Money Market Fund
7-day yield, assets, and how it ranks - from the July 2026 month-end N-MFP filing.
Data: July 2026 month-end SEC filings
All figures are from the July 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 (July 2026 month-end), FDLXX (Fidelity Treasury Only Money Market Fund) has a 7-day net yield of 3.36%.
- FDLXX's 7-day yield ranks #457 of 870 US money-market fund ticker share classes reporting a yield for July 2026.
- FDLXX is a Government money-market fund share class with $13.7B in net assets (#94 of 870 ticker classes by size).
- The fund's series-level 7-day gross yield was 3.77% - the 0.41-point gap to this class's net yield reflects fund expenses.
- At July 2026 month-end the fund's portfolio had a weighted average maturity (WAM) of 49 days and a weighted average life (WAL) of 98 days, with 100.0% of assets in daily liquid assets and 100.0% in weekly liquid assets (SEC minimums: 25% daily, 50% weekly).
- Twelve months earlier (July 2025) FDLXX's 7-day yield was 3.94% - it has moved down 0.58 points over the year.
- FDLXX's highest month-end 7-day yield in the SEC's structured data (since April 2016) is 5.01%, reported for October 2023.
- 98.67% of FDLXX's 2025 dividend income came from US government obligations per Fidelity - generally exempt from state income tax, and the fund met the CA/NY/CT 50%-asset test.
Yield history
Portfolio (series level)
Other share classes of this fund
| Class | Ticker | 7-day yield | Net assets | Min. investment |
|---|---|---|---|---|
| Fidelity Treasury Only Money Market Fund - Class OUS | FYIXX | 3.41% | $5.0B | None |
Compare
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Fund context & source
Fidelity Treasury Only Money Market Fund is a series of Fidelity Hereford Street Trust (SEC series ID S000007053). The whole series held $18.6B across all share classes at July 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.
State-tax note (2025 tax year)
Fidelity reports that 98.67% of FDLXX'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 FDLXX's 7-day yield?
As of the July 2026 month-end SEC Form N-MFP filing (July 31, 2026), FDLXX (Fidelity Treasury Only Money Market Fund) has a 7-day net yield of 3.36%.
Is FDLXX a government money market fund?
Yes - FDLXX is classified as a Government money-market fund in its own July 2026 Form N-MFP filing.
What is the minimum initial investment for FDLXX?
FDLXX reports a minimum initial investment of None on its July 2026 Form N-MFP filing.