MOSYX Performance — MassMutual Overseas Fund, Service Class
Data updated: 2026-08-27
MOSYX returned +2.30% year to date and +8.25% over one year to Jun 2026. Annualised returns are +9.91% over 3 years and +5.95% over 5 years. The fund trailed its Europe Equity category average: $100 invested three years ago grew to $133, against $151 for the category, and to $108 over one year, against $114. Volatility over the past three years was 13.08% a year. In the 12 months to Jun 2026 the fund lost a net $111.6M, and assets reached $258.77M.
MOSYX Growth of $100
What $100 invested in MassMutual Overseas Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Europe Equity category average over the same months.
| Period | MOSYX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $108 | $114 |
| 3 years (Jul 2023 – Jun 2026) | $133 | $151 |
| 5 years (Jul 2021 – Jun 2026) | $134 | $141 |
| Since data start (Jul 2019 – Jun 2026) | $174 | $183 |
MOSYX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +2.30% |
| 1 year | +8.25% |
| 3 years (annualised) | +9.91% |
| 5 years (annualised) | +5.95% |
MOSYX Annual Returns
Calendar-year total returns of MassMutual Overseas Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +2.30% |
| 2025 | +25.71% |
| 2024 | +0.49% |
| 2023 | +18.51% |
| 2022 | −14.95% |
| 2021 | +12.89% |
| 2020 | +8.81% |
| 2019 (Jul–Dec) | +8.62% |
MOSYX 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 | +1.7% | +2.7% | −9.0% | +5.3% | +2.4% | −0.2% | — | — | — | — | — | — |
| 2025 | −1.0% | +2.2% | +5.7% | +3.2% | +5.2% | +2.3% | −2.3% | +2.3% | +2.2% | 0.0% | +0.7% | +2.9% |
| 2024 | +2.5% | +2.2% | −1.6% | −2.8% | +4.4% | −3.2% | +2.0% | +3.3% | +2.9% | −2.0% | −1.0% | −5.7% |
| 2023 | +3.6% | −2.5% | +10.4% | +5.1% | −4.3% | +2.9% | −5.4% | −4.4% | +2.5% | +5.2% | +9.3% | −3.6% |
| 2022 | −1.0% | −4.8% | −2.4% | −8.9% | +2.5% | −6.1% | −8.9% | −6.2% | +4.4% | −2.2% | +14.3% | +5.8% |
| 2021 | +2.6% | +3.8% | −2.2% | −1.9% | +4.5% | +3.2% | −3.3% | +1.2% | +0.3% | +4.9% | −4.3% | +4.1% |
| 2020 | −17.7% | −7.5% | −3.6% | +5.1% | +4.0% | +7.4% | −3.2% | +5.1% | +3.2% | +5.9% | +18.6% | −4.3% |
| 2019 | — | — | — | — | — | — | +2.8% | −1.2% | −2.5% | +3.6% | +1.6% | +4.2% |
MOSYX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 13.08%
- 3-year Sharpe ratio: 0.41 (vs 4.5% risk-free rate)
- Best month: +9.33% (Nov 2023)
- Worst month: −9.02% (Mar 2026)
MOSYX Fund Flows
Monthly money in and out of MassMutual Overseas Fund, from SEC Form N-PORT.
- 12-month net flow: −$111.6M
- 12-month gross sales (incl. reinvestments): $128.5M
- Sales ÷ redemptions: 0.54×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $3.3M | $16.9M | −$13.6M |
| May 2026 | $4.2M | $12.0M | −$7.8M |
| Apr 2026 | $3.5M | $5.1M | −$1.7M |
| Mar 2026 | $5.3M | $7.9M | −$2.6M |
| Feb 2026 | $29.8M | $30.4M | −$594K |
| Jan 2026 | $3.6M | $40.9M | −$37.3M |
| Dec 2025 | $56.3M | $24.9M | $31.3M |
| Nov 2025 | $4.6M | $7.4M | −$2.7M |
| Oct 2025 | $4.7M | $7.2M | −$2.4M |
| Sep 2025 | $4.3M | $17.1M | −$12.8M |
| Aug 2025 | $4.7M | $61.9M | −$57.2M |
| Jul 2025 | $4.2M | $8.4M | −$4.2M |
MOSYX Assets Under Management
Net assets of MassMutual Overseas Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $258.77M |
| 2026-03-31 | $262.27M |
| 2025-12-31 | $315.83M |
| 2025-09-30 | $330.17M |
| 2025-06-30 | $396.88M |
| 2025-03-31 | $370.86M |
| 2024-12-31 | $430.32M |
| 2024-09-30 | $509.87M |
| 2024-06-30 | $475.31M |
| 2024-03-31 | $488.37M |
| 2023-12-31 | $489.89M |
| 2023-09-30 | $441.66M |
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.