Wealthy PotSPRXX Review (2026)
SPRXX trades a sliver of extra credit risk for a slightly higher yield than a government fund like SPAXX. For most investors the difference is small, but if you want to squeeze a bit more from cash at Fidelity and understand prime-fund mechanics, it delivers.
By Wealthy Pot · Last updated September 2026
Pros
- A prime fund that typically yields a bit more than government funds
- No minimum investment
- Broad diversification of short-term instruments
Cons
- Prime funds carry modestly more credit risk than government funds
- Fully taxable at the state level
- Can face liquidity fees/gates in extreme stress
Who SPRXX is for
Best for Fidelity investors comfortable with a prime money-market fund who want a marginally higher yield than the government sweep and don’t need state-tax benefits.
Yield, fees & minimum
Fidelity Money Market Fund (SPRXX) is a prime money-market fund from Fidelity, with a 0.42% expense ratio and a $0 minimum. Its 7-day SEC yield (3.36% (7-day SEC yield)) changes daily with short-term rates — confirm the current figure on the official page. State tax: mostly taxable (14.6% u.s. government obligations, 2025 — a prime fund holds corporate paper). It is not an automatic sweep — you buy and sell it yourself.
The bottom line
SPRXX trades a sliver of extra credit risk for a slightly higher yield than a government fund like SPAXX. For most investors the difference is small, but if you want to squeeze a bit more from cash at Fidelity and understand prime-fund mechanics, it delivers. Main drawback: prime funds carry slightly more credit risk and can face redemption fees/gates in a crisis.
Compare SPRXX with…
See how SPRXX stacks up in our money-market fund comparison, or compare FDIC-insured options in our high-yield savings guide.
We summarize the fund's published facts, not user reviews. 7-day yields are variable, change daily, and are re-checked against Fidelity's official page. Money-market funds are not FDIC-insured and, while low-risk, can lose value in extreme conditions. Some outbound links may be affiliate links — that never affects which funds we include or how we rate them. Nothing here is financial advice.