iShares Prime Money Market ETF (PMMF) Performance
PMMF total return
Distributions reinvested · as of Oct 23, 2026- YTD
- +3.0% since Dec 31, 2025
- 1 year
- +3.8% total return
- Since first price
- +7.0% since 2025
PMMF trailing returns vs SPY, QQQ, AGG
| Period | PMMF total return | Price only | S&P 500 (SPY) | Nasdaq-100 (QQQ) | U.S. bonds (AGG) |
|---|---|---|---|---|---|
| 1 month | +0.3% | +0.0% | −1.0% | −5.0% | +0.9% |
| 3 months | +1.0% | +0.0% | +3.2% | +1.9% | −0.4% |
| 6 months | +1.9% | +0.0% | +7.8% | +8.4% | −1.5% |
| YTD | +3.0% | +0.1% | +12.3% | +15.1% | −1.0% |
| 1 year | +3.8% | −0.2% | +14.4% | +15.9% | −1.1% |
| Since inceptionFeb 5, 2025 | +7.0% | +0.3% | — | — | — |
Total return from adjusted closes (distributions reinvested, before tax). Periods of 3 years or more are also shown annualized. Price only excludes distributions.
Growth of $10,000: PMMF vs SPY
From Feb 5, 2025: PMMF grew to $10,696, SPY to $12,825.
Year-end values with distributions reinvested, no taxes or trading costs. Start: first common trading day of both funds.
PMMF returns by calendar year
2026 is year to date.
PMMF annual returns table
| Year | PMMF | Largest drop | SPY | QQQ | AGG |
|---|---|---|---|---|---|
| 2026YTD | +3.0% | −0.0% | +12.3% | +15.1% | −1.0% |
Largest drop = deepest fall from a high within that calendar year.
Calendar-year return vs largest drop within the year
Most years include a sizable fall at some point even when the year ends higher.
PMMF risk statistics
| Statistic | Since 2025 |
|---|---|
| Annualized return | +4.0% |
| Volatility (annualized) | 0.1% |
| Sharpe ratio | 1.08 |
| Sortino ratio | 2.31 |
| Best month | +0.4% |
| Worst month | +0.3% |
| Best 12 months | +4.1% |
| Worst 12 months | +3.7% |
| Positive months | 100% |
| Beta vs S&P 500 | — |
| Correlation with S&P 500 | — |
From monthly total returns. Sharpe and Sortino use 1–3 month T-bills (BIL) as the risk-free rate, so they need history from 2007 on.
PMMF rolling returns
| Holding period | Periods | Worst | Median | Best | Positive |
|---|---|---|---|---|---|
| 1-year | 9 | +3.7% | +3.9% | +4.1% | 100% |
Every holding period starting at a month-end since 2025. Returns for 3 years and longer are annualized.
PMMF performance overview
iShares Prime Money Market ETF (PMMF) returned +3.8% over the past year, with distributions reinvested. Since its first recorded price on Feb 5, 2025 it has returned +7.0%. Over the same year S&P 500 (SPY) returned +14.4%.
Related: PMMF chart, PMMF dividends. See the PMMF overview for the latest quote and fund facts.
PMMF performance FAQ
What is the PMMF return over the past year?
PMMF returned +3.8% over the 12 months to October 23, 2026, including reinvested distributions. On price alone it fell 0.2%.
How much would $10,000 invested in PMMF be worth?
$10,000 invested in PMMF at its first recorded close on February 5, 2025 would be worth about $10,696 on October 23, 2026 with distributions reinvested.
How volatile is PMMF?
Over the past history PMMF had an annualized volatility of 0.1% and a Sharpe ratio of 1.08 (excess return over 1–3 month T-bills per unit of risk).