MMBUX Performance — MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, Class I
Data updated: 2025-08-25
MMBUX returned +6.16% over one year to Jun 2025. Annualised returns are +10.58% over 3 years and +10.30% over 5 years. The fund trailed its US Mid-Cap Blend category average: $100 invested three years ago grew to $135, against $140 for the category, and to $106 over one year, against $110. Volatility over the past three years was 18.63% a year. In the 12 months to Jun 2025 the fund lost a net $420.3M, and assets reached $164.05M.
MMBUX Growth of $100
What $100 invested in MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Mid-Cap Blend category average over the same months.
| Period | MMBUX | Category average |
|---|---|---|
| 1 year (Jul 2024 – Jun 2025) | $106 | $110 |
| 3 years (Jul 2022 – Jun 2025) | $135 | $140 |
| 5 years (Jul 2020 – Jun 2025) | $163 | $175 |
| Since data start (Jul 2019 – Jun 2025) | $167 | $171 |
MMBUX Trailing Returns
Total returns to Jun 2025, from SEC N-PORT.
| Period | Total return |
|---|---|
| 1 year | +6.16% |
| 3 years (annualised) | +10.58% |
| 5 years (annualised) | +10.30% |
MMBUX Annual Returns
Calendar-year total returns of MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2025 (Jan–Jun) | −1.95% |
| 2024 | +11.73% |
| 2023 | +19.04% |
| 2022 | −18.83% |
| 2021 | +18.74% |
| 2020 | +24.71% |
| 2019 (Jul–Dec) | +6.45% |
MMBUX 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | −5.8% | −4.0% | +2.8% | −2.6% | +4.6% | +3.5% | — | — | — | — | — | — |
| 2024 | +3.9% | +5.0% | −1.1% | −0.6% | +2.5% | −6.1% | +1.5% | +0.9% | +5.6% | −6.7% | +8.3% | −0.8% |
| 2023 | −2.8% | −1.8% | +9.5% | +8.0% | −1.6% | −0.7% | −5.3% | −3.5% | +4.7% | +9.5% | +9.0% | −5.4% |
| 2022 | +1.0% | +0.2% | −8.4% | −7.4% | −0.9% | −8.1% | −8.7% | −3.0% | +8.8% | −5.3% | +5.0% | +8.4% |
| 2021 | +2.1% | +5.5% | −0.3% | +1.6% | +0.1% | +4.7% | −2.3% | +2.3% | 0.0% | +2.9% | −3.7% | +4.9% |
| 2020 | −17.9% | −6.9% | −1.0% | +2.4% | +7.4% | +15.3% | −2.1% | +3.9% | +5.7% | +5.9% | +12.7% | +1.3% |
| 2019 | — | — | — | — | — | — | +0.7% | −2.9% | +1.3% | +2.4% | +4.1% | +0.9% |
MMBUX Risk
Risk measures from monthly returns over Jul 2022 – Jun 2025.
- 3-year volatility (annualised): 18.63%
- 3-year Sharpe ratio: 0.33 (vs 4.5% risk-free rate)
- Best month: +9.50% (Oct 2023)
- Worst month: −8.71% (Jul 2022)
MMBUX Fund Flows
Monthly money in and out of MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund, from SEC Form N-PORT.
- 12-month net flow: −$420.3M
- 12-month gross sales (incl. reinvestments): $156.5M
- Sales ÷ redemptions: 0.27×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2025 | $1.4M | $4.3M | −$2.9M |
| May 2025 | $1.6M | $14.2M | −$12.7M |
| Apr 2025 | $1.2M | $13.3M | −$12.1M |
| Mar 2025 | $9.9M | $390.1M | −$380.2M |
| Feb 2025 | $1.4M | $8.0M | −$6.6M |
| Jan 2025 | $1.2M | $10.5M | −$9.3M |
| Dec 2024 | $3.7M | $7.8M | −$4.1M |
| Nov 2024 | $3.1M | $22.9M | −$19.8M |
| Oct 2024 | $123.2M | $15.4M | $107.8M |
| Sep 2024 | $2.8M | $45.4M | −$42.5M |
| Aug 2024 | $4.6M | $26.2M | −$21.6M |
| Jul 2024 | $2.3M | $18.7M | −$16.4M |
MMBUX Assets Under Management
Net assets of MassMutual Select T. Rowe Price Small and Mid Cap Blend Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2025-06-30 | $164.05M |
| 2025-03-31 | $182.04M |
| 2024-12-31 | $591.21M |
| 2024-09-30 | $625.03M |
| 2024-06-30 | $655.53M |
| 2024-03-31 | $885.14M |
| 2023-12-31 | $805.17M |
| 2023-09-30 | $729.16M |
| 2023-06-30 | $772.30M |
| 2023-03-31 | $726.47M |
| 2022-12-31 | $702.83M |
| 2022-09-30 | $665.94M |
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.