MEDAX Performance — MFS Emerging Markets Debt Fund, Class A
Data updated: 2026-10-13
MEDAX returned +1.76% year to date and +8.06% over one year to Jul 2026. Annualised returns are +8.45% over 3 years and +2.28% over 5 years. Against its Emerging Markets Bond category average the fund came out ahead over three years but behind over one: $100 invested three years ago grew to $128, against $126 for the category, and to $108 over one year, against $109. Volatility over the past three years was 6.44% a year. In the 12 months to Jul 2026 the fund lost a net $30.4M, and assets reached $7.52B.
MEDAX Growth of $100
What $100 invested in MFS Emerging Markets Debt Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Emerging Markets Bond category average over the same months.
| Period | MEDAX | Category average |
|---|---|---|
| 1 year (Aug 2025 – Jul 2026) | $108 | $109 |
| 3 years (Aug 2023 – Jul 2026) | $128 | $126 |
| 5 years (Aug 2021 – Jul 2026) | $112 | $115 |
| Since data start (Aug 2019 – Jul 2026) | $122 | $123 |
MEDAX Trailing Returns
Total returns to Jul 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +1.76% |
| 1 year | +8.06% |
| 3 years (annualised) | +8.45% |
| 5 years (annualised) | +2.28% |
MEDAX Annual Returns
Calendar-year total returns of MFS Emerging Markets Debt Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jul) | +1.76% |
| 2025 | +12.25% |
| 2024 | +6.79% |
| 2023 | +10.18% |
| 2022 | −15.04% |
| 2021 | −2.64% |
| 2020 | +7.73% |
| 2019 (Aug–Dec) | +1.96% |
MEDAX 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 | +1.0% | +1.1% | −3.4% | +2.7% | +0.8% | +0.7% | −1.1% | — | — | — | — | — |
| 2025 | +1.3% | +1.3% | −0.7% | −0.4% | +0.8% | +2.3% | +0.9% | +1.5% | +1.2% | +1.8% | +0.7% | +0.8% |
| 2024 | −0.8% | +1.1% | +2.1% | −1.8% | +1.4% | +0.6% | +1.9% | +2.3% | +1.8% | −1.7% | +1.0% | −1.1% |
| 2023 | +4.1% | −2.7% | +0.4% | +0.6% | −1.0% | +2.1% | +1.9% | −1.9% | −2.5% | −1.3% | +5.5% | +5.0% |
| 2022 | −2.6% | −5.2% | −0.3% | −5.0% | −0.4% | −6.7% | +2.8% | −0.4% | −6.5% | +0.2% | +8.0% | +0.9% |
| 2021 | −0.8% | −1.8% | −1.6% | +1.7% | +1.0% | +0.7% | +0.2% | +0.9% | −1.8% | −0.3% | −2.0% | +1.3% |
| 2020 | +1.7% | −0.9% | −12.5% | +3.2% | +5.5% | +2.8% | +3.2% | +1.0% | −1.4% | +0.3% | +3.8% | +2.1% |
| 2019 | — | — | — | — | — | — | — | −0.6% | −0.1% | +0.7% | 0.0% | +1.9% |
MEDAX Risk
Risk measures from monthly returns over Aug 2023 – Jul 2026.
- 3-year volatility (annualised): 6.44%
- 3-year Sharpe ratio: 0.61 (vs 4.5% risk-free rate)
- Best month: +5.48% (Nov 2023)
- Worst month: −3.37% (Mar 2026)
MEDAX Fund Flows
Monthly money in and out of MFS Emerging Markets Debt Fund, from SEC Form N-PORT.
- 12-month net flow: −$30.4M
- 12-month gross sales (incl. reinvestments): $2.0B
- Sales ÷ redemptions: 0.99×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jul 2026 | $129.8M | $102.1M | $27.7M |
| Jun 2026 | $129.1M | $137.9M | −$8.8M |
| May 2026 | $151.9M | $129.8M | $22.0M |
| Apr 2026 | $165.3M | $197.4M | −$32.1M |
| Mar 2026 | $226.4M | $201.5M | $24.9M |
| Feb 2026 | $181.5M | $128.3M | $53.2M |
| Jan 2026 | $208.6M | $114.5M | $94.1M |
| Dec 2025 | $138.9M | $384.6M | −$245.7M |
| Nov 2025 | $156.4M | $133.6M | $22.9M |
| Oct 2025 | $239.0M | $151.5M | $87.4M |
| Sep 2025 | $157.9M | $154.6M | $3.2M |
| Aug 2025 | $145.0M | $224.3M | −$79.3M |
MEDAX Assets Under Management
Net assets of MFS Emerging Markets Debt Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-07-31 | $7.52B |
| 2026-04-30 | $7.55B |
| 2026-01-31 | $7.58B |
| 2025-10-31 | $7.62B |
| 2025-07-31 | $7.37B |
| 2025-04-30 | $6.96B |
| 2025-01-31 | $7.36B |
| 2024-10-31 | $7.32B |
| 2024-07-31 | $7.14B |
| 2024-04-30 | $6.98B |
| 2024-01-31 | $6.65B |
| 2023-10-31 | $6.15B |
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.