MDIOX Performance — MFS International Diversification Fund, Class R1
Data updated: 2026-09-25
MDIOX returned +9.06% year to date and +21.51% over one year to May 2026. Annualised returns are +15.92% over 3 years and +5.96% over 5 years. The fund trailed its International Multi-Cap Blend category average: $100 invested three years ago grew to $156, against $170 for the category, and to $122 over one year, against $126. Volatility over the past three years was 12.09% a year. In the 12 months to May 2026 the fund lost a net $3.6B, and assets reached $44.59B.
MDIOX Growth of $100
What $100 invested in MFS International Diversification Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the International Multi-Cap Blend category average over the same months.
| Period | MDIOX | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $122 | $126 |
| 3 years (Jun 2023 – May 2026) | $156 | $170 |
| 5 years (Jun 2021 – May 2026) | $134 | $153 |
| Since data start (Sep 2019 – May 2026) | $182 | $206 |
MDIOX Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +9.06% |
| 1 year | +21.51% |
| 3 years (annualised) | +15.92% |
| 5 years (annualised) | +5.96% |
MDIOX Annual Returns
Calendar-year total returns of MFS International Diversification Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | +9.06% |
| 2025 | +26.57% |
| 2024 | +5.36% |
| 2023 | +13.18% |
| 2022 | −17.91% |
| 2021 | +6.62% |
| 2020 | +14.13% |
| 2019 (Sep–Dec) | +10.92% |
MDIOX 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 | +5.0% | +4.2% | −9.1% | +6.4% | +2.9% | — | — | — | — | — | — | — |
| 2025 | +4.0% | +1.7% | −0.1% | +2.8% | +4.7% | +3.0% | −1.0% | +2.8% | +2.8% | +0.8% | +0.7% | +1.8% |
| 2024 | −1.7% | +2.4% | +3.3% | −2.2% | +4.0% | −0.8% | +3.5% | +2.8% | +2.3% | −4.9% | −0.8% | −2.4% |
| 2023 | +8.3% | −3.9% | +3.1% | +2.1% | −3.6% | +4.0% | +2.7% | −3.5% | −4.2% | −3.2% | +7.3% | +4.5% |
| 2022 | −4.5% | −3.8% | −1.2% | −6.2% | +1.0% | −7.7% | +4.7% | −4.9% | −9.3% | +2.9% | +13.5% | −1.9% |
| 2021 | −1.2% | +0.8% | +2.0% | +2.6% | +3.5% | −1.4% | −0.2% | +1.8% | −4.2% | +3.1% | −3.8% | +3.7% |
| 2020 | −2.4% | −6.8% | −11.9% | +7.4% | +4.5% | +4.1% | +5.0% | +4.0% | −1.4% | −3.1% | +11.1% | +5.3% |
| 2019 | — | — | — | — | — | — | — | — | +1.7% | +3.3% | +1.7% | +3.8% |
MDIOX Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 12.09%
- 3-year Sharpe ratio: 0.94 (vs 4.5% risk-free rate)
- Best month: +7.31% (Nov 2023)
- Worst month: −9.08% (Mar 2026)
MDIOX Fund Flows
Monthly money in and out of MFS International Diversification Fund, from SEC Form N-PORT.
- 12-month net flow: −$3.6B
- 12-month gross sales (incl. reinvestments): $9.0B
- Sales ÷ redemptions: 0.71×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $459.6M | $1.3B | −$842.6M |
| Apr 2026 | $455.1M | $1.2B | −$732.4M |
| Mar 2026 | $513.0M | $1.1B | −$598.2M |
| Feb 2026 | $653.3M | $1.3B | −$663.8M |
| Jan 2026 | $638.6M | $1.3B | −$626.1M |
| Dec 2025 | $2.6B | $1.0B | $1.5B |
| Nov 2025 | $430.5M | $884.4M | −$454.0M |
| Oct 2025 | $698.0M | $1.3B | −$575.9M |
| Sep 2025 | $501.8M | $904.1M | −$402.3M |
| Aug 2025 | $571.4M | $664.3M | −$92.9M |
| Jul 2025 | $672.0M | $848.4M | −$176.4M |
| Jun 2025 | $839.6M | $832.0M | $7.7M |
MDIOX Assets Under Management
Net assets of MFS International Diversification Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $44.59B |
| 2026-02-28 | $46.91B |
| 2025-11-30 | $43.82B |
| 2025-08-31 | $43.26B |
| 2025-05-31 | $41.42B |
| 2025-02-28 | $39.00B |
| 2024-11-30 | $38.07B |
| 2024-08-31 | $39.92B |
| 2024-05-31 | $38.65B |
| 2024-02-29 | $37.79B |
| 2023-11-30 | $36.55B |
| 2023-08-31 | $37.05B |
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.