MIDAX Performance — MFS International New Discovery Fund, Class A
Data updated: 2026-08-25
MIDAX returned +6.19% year to date and +7.23% over one year to Jun 2026. Annualised returns are +9.66% over 3 years and +2.63% over 5 years. The fund trailed its International Mid-Cap Growth category average: $100 invested three years ago grew to $132, against $147 for the category, and to $107 over one year, against $115. Volatility over the past three years was 13.22% a year. In the 12 months to Jun 2026 the fund took in a net $839.3M, and assets reached $7.63B.
MIDAX Growth of $100
What $100 invested in MFS International New Discovery Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the International Mid-Cap Growth category average over the same months.
| Period | MIDAX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $107 | $115 |
| 3 years (Jul 2023 – Jun 2026) | $132 | $147 |
| 5 years (Jul 2021 – Jun 2026) | $114 | $129 |
| Since data start (Jul 2019 – Jun 2026) | $142 | $183 |
MIDAX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +6.19% |
| 1 year | +7.23% |
| 3 years (annualised) | +9.66% |
| 5 years (annualised) | +2.63% |
MIDAX Annual Returns
Calendar-year total returns of MFS International New Discovery Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +6.19% |
| 2025 | +16.61% |
| 2024 | +0.64% |
| 2023 | +12.78% |
| 2022 | −18.81% |
| 2021 | +4.66% |
| 2020 | +9.70% |
| 2019 (Jul–Dec) | +8.10% |
MIDAX 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 | +3.6% | +4.9% | −9.8% | +7.0% | +2.5% | −1.2% | — | — | — | — | — | — |
| 2025 | +0.9% | +0.9% | +0.6% | +4.5% | +4.3% | +3.4% | −1.8% | +3.1% | +0.7% | −1.7% | +0.5% | +0.4% |
| 2024 | −2.8% | +1.7% | +2.6% | −2.2% | +2.4% | −1.0% | +5.0% | +2.7% | +3.2% | −5.9% | −0.5% | −3.9% |
| 2023 | +7.2% | −3.6% | +2.5% | +1.9% | −3.5% | +2.3% | +3.4% | −2.6% | −4.7% | −3.6% | +8.1% | +5.8% |
| 2022 | −7.2% | −1.7% | −2.1% | −5.8% | +0.1% | −7.6% | +6.2% | −5.0% | −9.6% | +3.4% | +11.6% | −0.8% |
| 2021 | −1.7% | −0.7% | +2.9% | +2.4% | +2.2% | −0.2% | +1.1% | +2.7% | −3.5% | +0.8% | −4.2% | +3.1% |
| 2020 | −2.5% | −8.7% | −15.8% | +9.8% | +6.9% | +1.7% | +3.8% | +5.6% | −0.6% | −2.5% | +10.2% | +4.7% |
| 2019 | — | — | — | — | — | — | −1.7% | −1.0% | +1.3% | +4.0% | +1.7% | +3.5% |
MIDAX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 13.22%
- 3-year Sharpe ratio: 0.39 (vs 4.5% risk-free rate)
- Best month: +8.11% (Nov 2023)
- Worst month: −9.80% (Mar 2026)
MIDAX Fund Flows
Monthly money in and out of MFS International New Discovery Fund, from SEC Form N-PORT.
- 12-month net flow: $839.3M
- 12-month gross sales (incl. reinvestments): $1.7B
- Sales ÷ redemptions: 1.97×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $26.9M | $76.2M | −$49.4M |
| May 2026 | $26.3M | $150.1M | −$123.8M |
| Apr 2026 | $30.8M | $127.3M | −$96.6M |
| Mar 2026 | $31.3M | $102.1M | −$70.8M |
| Feb 2026 | $37.5M | $70.5M | −$33.0M |
| Jan 2026 | $37.2M | $48.9M | −$11.7M |
| Dec 2025 | $280.4M | $58.2M | $222.3M |
| Nov 2025 | $75.2M | $35.8M | $39.5M |
| Oct 2025 | $691.5M | $62.9M | $628.6M |
| Sep 2025 | $18.5M | $45.4M | −$26.9M |
| Aug 2025 | $27.1M | $35.6M | −$8.6M |
| Jul 2025 | $424.8M | $55.1M | $369.6M |
MIDAX Assets Under Management
Net assets of MFS International New Discovery Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $7.63B |
| 2026-03-31 | $7.28B |
| 2025-12-31 | $7.55B |
| 2025-09-30 | $6.95B |
| 2025-06-30 | $6.49B |
| 2025-03-31 | $5.93B |
| 2024-12-31 | $5.85B |
| 2024-09-30 | $6.62B |
| 2024-06-30 | $6.24B |
| 2024-03-31 | $6.42B |
| 2023-12-31 | $6.47B |
| 2023-09-30 | $6.04B |
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.