MHIIX Performance — MFS High Income Fund, Class I
Data updated: 2026-09-28
MHIIX returned +0.79% year to date and +4.21% over one year to Jul 2026. Annualised returns are +7.46% over 3 years and +3.53% over 5 years. Against its Short-Term Corporate Bond category average the fund came out ahead over three years but behind over one: $100 invested three years ago grew to $124, against $120 for the category, and to $104 over one year, against $104. Volatility over the past three years was 4.25% a year. In the 12 months to Jul 2026 the fund took in a net $13.3M, and assets reached $1.93B.
MHIIX Growth of $100
What $100 invested in MFS High Income Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Short-Term Corporate Bond category average over the same months.
| Period | MHIIX | Category average |
|---|---|---|
| 1 year (Aug 2025 – Jul 2026) | $104 | $104 |
| 3 years (Aug 2023 – Jul 2026) | $124 | $120 |
| 5 years (Aug 2021 – Jul 2026) | $119 | $116 |
| Since data start (Aug 2019 – Jul 2026) | $133 | $127 |
MHIIX Trailing Returns
Total returns to Jul 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +0.79% |
| 1 year | +4.21% |
| 3 years (annualised) | +7.46% |
| 5 years (annualised) | +3.53% |
MHIIX Annual Returns
Calendar-year total returns of MFS High Income Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jul) | +0.79% |
| 2025 | +8.98% |
| 2024 | +6.85% |
| 2023 | +12.48% |
| 2022 | −10.40% |
| 2021 | +3.47% |
| 2020 | +4.69% |
| 2019 (Aug–Dec) | +3.80% |
MHIIX 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 | +0.5% | +0.2% | −1.4% | +1.5% | +0.2% | +0.2% | −0.5% | — | — | — | — | — |
| 2025 | +1.5% | +0.5% | −1.1% | +0.2% | +1.8% | +1.8% | +0.5% | +1.2% | +0.9% | +0.2% | +0.5% | +0.5% |
| 2024 | +0.2% | +0.2% | +0.8% | −0.8% | +1.2% | +0.9% | +1.5% | +1.5% | +1.5% | −0.8% | +1.2% | −0.8% |
| 2023 | +3.9% | −1.5% | +1.8% | +0.5% | −0.8% | +1.2% | +1.2% | +0.2% | −1.2% | −1.2% | +4.4% | +3.5% |
| 2022 | −2.6% | −0.8% | −1.1% | −3.7% | +0.7% | −6.7% | +6.0% | −2.9% | −4.0% | +2.9% | +2.5% | −0.6% |
| 2021 | +0.1% | +0.1% | +0.1% | +1.0% | +0.1% | +1.2% | +0.4% | +0.4% | +0.1% | −0.5% | −1.1% | +1.7% |
| 2020 | −0.2% | −1.1% | −9.1% | +3.1% | +3.6% | +0.1% | +4.5% | +0.7% | −1.1% | +0.4% | +3.1% | +1.3% |
| 2019 | — | — | — | — | — | — | — | +1.0% | +0.1% | +0.7% | +0.7% | +1.3% |
MHIIX Risk
Risk measures from monthly returns over Aug 2023 – Jul 2026.
- 3-year volatility (annualised): 4.25%
- 3-year Sharpe ratio: 0.70 (vs 4.5% risk-free rate)
- Best month: +4.39% (Nov 2023)
- Worst month: −1.38% (Mar 2026)
MHIIX Fund Flows
Monthly money in and out of MFS High Income Fund, from SEC Form N-PORT.
- 12-month net flow: $13.3M
- 12-month gross sales (incl. reinvestments): $321.0M
- Sales ÷ redemptions: 1.04×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jul 2026 | $25.2M | $27.3M | −$2.1M |
| Jun 2026 | $22.1M | $20.5M | $1.5M |
| May 2026 | $22.8M | $20.9M | $1.9M |
| Apr 2026 | $25.8M | $29.3M | −$3.4M |
| Mar 2026 | $24.5M | $37.7M | −$13.2M |
| Feb 2026 | $30.8M | $24.7M | $6.1M |
| Jan 2026 | $29.0M | $26.2M | $2.8M |
| Dec 2025 | $29.1M | $26.2M | $2.9M |
| Nov 2025 | $27.9M | $29.0M | −$1.2M |
| Oct 2025 | $30.0M | $22.3M | $7.7M |
| Sep 2025 | $26.3M | $22.9M | $3.4M |
| Aug 2025 | $27.6M | $20.6M | $7.0M |
MHIIX Assets Under Management
Net assets of MFS High Income Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-07-31 | $1.93B |
| 2026-04-30 | $1.96B |
| 2026-01-31 | $1.99B |
| 2025-10-31 | $1.99B |
| 2025-07-31 | $1.95B |
| 2025-04-30 | $1.85B |
| 2025-01-31 | $1.91B |
| 2024-10-31 | $1.89B |
| 2024-07-31 | $1.84B |
| 2024-04-30 | $1.78B |
| 2024-01-31 | $1.77B |
| 2023-10-31 | $1.62B |
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.