MRSGX Performance — MFS Research International Fund, Class R1
Data updated: 2026-07-27
MRSGX returned +8.28% year to date and +16.05% over one year to May 2026. Annualised returns are +12.62% over 3 years and +4.57% over 5 years. The fund trailed its International Mid-Cap Blend category average: $100 invested three years ago grew to $143, against $163 for the category, and to $116 over one year, against $122. Volatility over the past three years was 12.49% a year. In the 12 months to May 2026 the fund lost a net $1.2B, and assets reached $17.76B.
MRSGX Growth of $100
What $100 invested in MFS Research International Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the International Mid-Cap Blend category average over the same months.
| Period | MRSGX | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $116 | $122 |
| 3 years (Jun 2023 – May 2026) | $143 | $163 |
| 5 years (Jun 2021 – May 2026) | $125 | $142 |
| Since data start (Sep 2019 – May 2026) | $171 | $194 |
MRSGX Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +8.28% |
| 1 year | +16.05% |
| 3 years (annualised) | +12.62% |
| 5 years (annualised) | +4.57% |
MRSGX Annual Returns
Calendar-year total returns of MFS Research International Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | +8.28% |
| 2025 | +21.45% |
| 2024 | +2.06% |
| 2023 | +12.22% |
| 2022 | −18.19% |
| 2021 | +10.80% |
| 2020 | +12.04% |
| 2019 (Sep–Dec) | +12.06% |
MRSGX 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 | +5.6% | +4.9% | −9.0% | +5.3% | +2.0% | — | — | — | — | — | — | — |
| 2025 | +3.8% | +1.9% | −1.1% | +3.1% | +5.0% | +2.1% | −2.9% | +2.2% | +2.0% | +0.7% | +0.9% | +2.1% |
| 2024 | −0.9% | +2.1% | +3.2% | −3.1% | +4.9% | −1.6% | +3.1% | +3.3% | +0.3% | −4.8% | −0.6% | −3.4% |
| 2023 | +7.8% | −3.6% | +2.8% | +3.0% | −4.2% | +3.8% | +1.9% | −2.9% | −4.9% | −3.1% | +7.4% | +4.7% |
| 2022 | −5.4% | −3.4% | −1.2% | −6.3% | +1.6% | −8.1% | +5.3% | −5.7% | −9.8% | +4.3% | +12.9% | −1.9% |
| 2021 | −1.7% | +1.4% | +2.3% | +2.8% | +4.2% | −1.8% | +1.1% | +2.9% | −4.0% | +3.6% | −3.8% | +3.8% |
| 2020 | −2.0% | −6.8% | −12.2% | +6.2% | +5.5% | +3.7% | +3.7% | +4.8% | −1.2% | −4.2% | +11.5% | +5.0% |
| 2019 | — | — | — | — | — | — | — | — | +2.5% | +3.5% | +1.9% | +3.6% |
MRSGX Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 12.49%
- 3-year Sharpe ratio: 0.65 (vs 4.5% risk-free rate)
- Best month: +7.40% (Nov 2023)
- Worst month: −9.03% (Mar 2026)
MRSGX Fund Flows
Monthly money in and out of MFS Research International Fund, from SEC Form N-PORT.
- 12-month net flow: −$1.2B
- 12-month gross sales (incl. reinvestments): $1.6B
- Sales ÷ redemptions: 0.57×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $49.0M | $396.4M | −$347.4M |
| Apr 2026 | $48.1M | $205.8M | −$157.7M |
| Mar 2026 | $69.8M | $247.8M | −$177.9M |
| Feb 2026 | $53.7M | $468.4M | −$414.7M |
| Jan 2026 | $45.5M | $372.7M | −$327.2M |
| Dec 2025 | $947.4M | $394.2M | $553.2M |
| Nov 2025 | $37.0M | $195.4M | −$158.4M |
| Oct 2025 | $64.9M | $152.6M | −$87.6M |
| Sep 2025 | $55.3M | $110.3M | −$55.0M |
| Aug 2025 | $109.2M | $80.3M | $29.0M |
| Jul 2025 | $87.4M | $124.1M | −$36.7M |
| Jun 2025 | $61.6M | $110.9M | −$49.4M |
MRSGX Assets Under Management
Net assets of MFS Research International Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $17.76B |
| 2026-02-28 | $18.84B |
| 2025-11-30 | $17.69B |
| 2025-08-31 | $17.32B |
| 2025-05-31 | $17.10B |
| 2025-02-28 | $16.31B |
| 2024-11-30 | $16.09B |
| 2024-08-31 | $17.01B |
| 2024-05-31 | $16.62B |
| 2024-02-29 | $16.26B |
| 2023-11-30 | $15.67B |
| 2023-08-31 | $16.06B |
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.