Highest-yielding government money market funds
Ranked by August 2026 month-end SEC 7-day net yield (≥$100M net assets).
Data: August 2026 month-end SEC filings
All figures are from the August 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.
- The highest 7-day net yield among government money market funds with at least $100 million in net assets is 3.78%, reported by CMQXX (Capital Group Central Fund Series - Capital Group Central Cash Fund) as of .
- 451 government classes (≥$100M) reported a 7-day yield for August 2026; the median was 3.49%.
| # | Ticker | Fund | Category | 7-day yield | Net assets | Min. investment |
|---|---|---|---|---|---|---|
| 1 | CMQXX | Capital Group Central Fund Series - Capital Group Central Cash Fund | Government | 3.78% | $121.1B | None |
| 2 | FGNXX | Fidelity Series Government Money Market Fund | Government | 3.77% | $2.9B | None |
| 3 | FLGXX | Fidelity Flex Government Money Market Fund | Government | 3.77% | $221.7M | None |
| 4 | GCCXX | Goldman Sachs Central Government Fund | Government | 3.76% | $9.8B | None |
| 5 | AGJXX | U.S. Government Money Market Fund | Government | 3.75% | $258.0M | None |
| 6 | TRZXX | T. Rowe Price U.S. Treasury Money Fund | Government | 3.74% | $602.2M | None |
| 7 | QCMMFX | Money Market Account | Government | 3.71% | $499.6M | None |
| 8 | VUSXX | Vanguard Treasury Money Market Fund | Government | 3.69% | $113.4B | $3,000 |
| 9 | GABXX | Gabelli U.S Treasury Money Market Fund | Government | 3.69% | $5.6B | $10,000 |
| 10 | VSLXX | JPMorgan Securities Lending Money Market Fund | Government | 3.68% | $2.1B | $100,000,000 |
| 11 | MRGXX | State Street Institutional U.S. Government Money Market Fund | Government | 3.67% | $8.3B | $25,000,000 |
| 12 | SSOXX | State Street Institutional U.S. Government Money Market Fund | Government | 3.66% | $11.1B | $1,000,000,000 |
| 13 | TAFXX | NTAM Treasury Assets Fund | Government | 3.66% | $5.8B | $5,000,000,000 |
| 14 | NTYXX | Treasury Instruments Portfolio | Government | 3.66% | $3.7B | $5,000,000 |
| 15 | GFGXX | Goldman Sachs Government Fund Series II | Government | 3.66% | $300.1M | None |
| 16 | SWIXX | Treasury Instruments Portfolio | Government | 3.66% | $125.1M | None |
| 17 | FRSXX | Fidelity Investments Money Market Treasury Only Portfolio | Government | 3.65% | $94.1B | $10,000,000 |
| 18 | ICAXX | DWS Government Money Market Series | Government | 3.65% | $37.7B | $1,000,000 |
| 19 | IUGXX | Invesco Premier U.S. Government Money Portfolio | Government | 3.65% | $23.8B | $1,000 |
| 20 | TAQXX | State Street Treasury Obligations Money Market Fund | Government | 3.65% | $3.6B | $1,000,000,000 |
| 21 | WAEXX | Western Asset Premier Institutional U.S. Treasury Reserves | Government | 3.65% | $2.6B | None |
| 22 | CEIXX | BNY Dreyfus Institutional Preferred Treasury Securities Money Market Fund | Government | 3.65% | $2.2B | $1,000,000,000 |
| 23 | FUGXX | Invesco Premier U.S. Government Money Portfolio | Government | 3.65% | $680.2M | $1,000 |
| 24 | VMRXX | Vanguard Cash Reserves Federal Money Market Fund | Government | 3.64% | $116.6B | $3,000 |
| 25 | FRBXX | Fidelity Investments Money Market Treasury Portfolio | Government | 3.64% | $50.7B | $10,000,000 |
Screen: ticker share classes with at least $100 million in net assets and a reported 7-day net yield on the August 2026 month-end filings (588 of 870 ticker classes). Tiny classes are excluded because they report outlier yields; the full CSV has every class. Rankings are arithmetic on SEC filings - not recommendations.
FAQ
What is the highest-yielding government money market fund?
As of the August 2026 month-end SEC Form N-MFP filings, the highest 7-day net yield among government money market funds with at least $100 million in net assets is 3.78%, reported by CMQXX (Capital Group Central Fund Series - Capital Group Central Cash Fund).