MMOPX Performance — MassMutual Inflation-Protected and Income Fund
Data updated: 2026-08-27
MMOPX returned +1.27% year to date and +2.23% over one year to Jun 2026. Annualised returns are +3.91% over 3 years and +0.53% over 5 years. The fund trailed its Short-Term Securitized Bond category average: $100 invested three years ago grew to $112, against $120 for the category, and to $102 over one year, against $105. Volatility over the past three years was 4.18% a year. In the 12 months to Jun 2026 the fund lost a net $11.6M, and assets reached $204.17M. Returns are those of sibling share class MPSAX; this class's own returns are not reported in filings.
MMOPX Growth of $100
What $100 invested in MassMutual Inflation-Protected and Income Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Short-Term Securitized Bond category average over the same months.
| Period | MMOPX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $102 | $105 |
| 3 years (Jul 2023 – Jun 2026) | $112 | $120 |
| 5 years (Jul 2021 – Jun 2026) | $103 | $117 |
| Since data start (Jul 2019 – Jun 2026) | $118 | $126 |
MMOPX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +1.27% |
| 1 year | +2.23% |
| 3 years (annualised) | +3.91% |
| 5 years (annualised) | +0.53% |
MMOPX Annual Returns
Calendar-year total returns of MassMutual Inflation-Protected and Income Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +1.27% |
| 2025 | +5.50% |
| 2024 | +2.31% |
| 2023 | +4.94% |
| 2022 | −13.73% |
| 2021 | +5.88% |
| 2020 | +10.80% |
| 2019 (Jul–Dec) | +1.90% |
MMOPX Monthly Returns
Monthly total returns as reported on SEC Form N-PORT.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +0.4% | +1.1% | −1.1% | +1.2% | +0.1% | −0.4% | — | — | — | — | — | — |
| 2025 | +0.5% | +2.1% | +1.5% | −0.1% | −0.4% | +0.9% | +0.2% | +1.4% | −0.2% | +0.2% | 0.0% | −0.6% |
| 2024 | +0.9% | −1.2% | +0.5% | +0.8% | +1.8% | −1.7% | +1.6% | +0.8% | +1.8% | −1.6% | +0.5% | −1.8% |
| 2023 | +2.8% | −1.3% | +2.1% | −0.3% | −1.2% | +0.2% | −1.9% | −0.5% | +0.3% | +2.8% | +2.7% | −0.7% |
| 2022 | −2.1% | +0.6% | −2.1% | −3.7% | −1.1% | −2.0% | −6.8% | −2.2% | +4.1% | −0.6% | +0.9% | +0.8% |
| 2021 | 0.0% | −1.7% | +0.5% | +0.6% | +1.2% | +1.4% | −0.8% | −0.2% | +2.6% | +0.2% | +0.9% | +1.1% |
| 2020 | −4.2% | +1.1% | +1.9% | +2.0% | +0.2% | +3.7% | 0.0% | +1.2% | +2.7% | +1.2% | +1.2% | −0.6% |
| 2019 | — | — | — | — | — | — | −1.4% | +2.4% | +0.4% | 0.0% | +0.5% | 0.0% |
MMOPX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 4.18%
- 3-year Sharpe ratio: -0.14 (vs 4.5% risk-free rate)
- Best month: +2.75% (Oct 2023)
- Worst month: −1.86% (Jul 2023)
MMOPX Fund Flows
Monthly money in and out of MassMutual Inflation-Protected and Income Fund, from SEC Form N-PORT.
- 12-month net flow: −$11.6M
- 12-month gross sales (incl. reinvestments): $78.3M
- Sales ÷ redemptions: 0.87×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $6.4M | $5.2M | $1.2M |
| May 2026 | $6.2M | $4.8M | $1.4M |
| Apr 2026 | $4.2M | $5.1M | −$920K |
| Mar 2026 | $9.5M | $7.0M | $2.5M |
| Feb 2026 | $5.0M | $3.5M | $1.5M |
| Jan 2026 | $5.7M | $6.6M | −$832K |
| Dec 2025 | $6.7M | $15.7M | −$9.0M |
| Nov 2025 | $7.7M | $10.5M | −$2.8M |
| Oct 2025 | $7.7M | $6.7M | $1.0M |
| Sep 2025 | $6.8M | $8.8M | −$2.0M |
| Aug 2025 | $5.4M | $10.9M | −$5.5M |
| Jul 2025 | $7.1M | $5.2M | $1.8M |
MMOPX Assets Under Management
Net assets of MassMutual Inflation-Protected and Income Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $204.17M |
| 2026-03-31 | $203.28M |
| 2025-12-31 | $200.41M |
| 2025-09-30 | $214.76M |
| 2025-06-30 | $219.41M |
| 2025-03-31 | $220.53M |
| 2024-12-31 | $229.07M |
| 2024-09-30 | $244.10M |
| 2024-06-30 | $241.31M |
| 2024-03-31 | $253.55M |
| 2023-12-31 | $249.91M |
| 2023-09-30 | $260.46M |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.