MMUIX Performance — MFS Utilities Fund, Class I
Data updated: 2026-09-28
MMUIX returned +6.66% year to date and +10.69% over one year to Jul 2026. Annualised returns are +10.27% over 3 years and +7.99% over 5 years. Against its Utilities Equity category average the fund came out behind over three years but ahead over one: $100 invested three years ago grew to $134, against $145 for the category, and to $111 over one year, against $107. Volatility over the past three years was 15.44% a year. In the 12 months to Jul 2026 the fund lost a net $140.7M, and assets reached $2.61B.
MMUIX Growth of $100
What $100 invested in MFS Utilities Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Utilities Equity category average over the same months.
| Period | MMUIX | Category average |
|---|---|---|
| 1 year (Aug 2025 – Jul 2026) | $111 | $107 |
| 3 years (Aug 2023 – Jul 2026) | $134 | $145 |
| 5 years (Aug 2021 – Jul 2026) | $147 | $156 |
| Since data start (Aug 2019 – Jul 2026) | $178 | $181 |
MMUIX Trailing Returns
Total returns to Jul 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +6.66% |
| 1 year | +10.69% |
| 3 years (annualised) | +10.27% |
| 5 years (annualised) | +7.99% |
MMUIX Annual Returns
Calendar-year total returns of MFS Utilities Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jul) | +6.66% |
| 2025 | +15.13% |
| 2024 | +11.66% |
| 2023 | −2.00% |
| 2022 | +0.70% |
| 2021 | +14.15% |
| 2020 | +6.23% |
| 2019 (Aug–Dec) | +8.33% |
MMUIX 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 | +2.2% | +10.5% | −3.4% | +3.0% | −5.2% | +2.3% | −2.1% | — | — | — | — | — |
| 2025 | +0.3% | +0.6% | +0.4% | +1.4% | +3.9% | +0.3% | +3.7% | −1.0% | +4.0% | +3.0% | +2.2% | −4.2% |
| 2024 | −4.9% | −0.8% | +5.0% | +0.3% | +8.7% | −5.5% | +7.2% | +4.2% | +5.9% | −3.0% | +3.4% | −7.8% |
| 2023 | −0.1% | −4.6% | +4.5% | +2.7% | −5.3% | +2.3% | +1.2% | −5.9% | −6.0% | +0.1% | +7.1% | +3.0% |
| 2022 | −3.3% | 0.0% | +7.0% | −3.2% | +2.8% | −6.8% | +6.8% | −0.5% | −10.3% | +3.9% | +7.3% | −1.2% |
| 2021 | −1.3% | −5.5% | +8.6% | +3.8% | −0.7% | −1.3% | +2.1% | +4.2% | −6.2% | +5.6% | −1.9% | +7.1% |
| 2020 | +4.1% | −7.4% | −14.6% | +6.8% | +4.5% | −1.5% | +6.0% | −1.4% | −1.4% | +3.8% | +6.1% | +3.4% |
| 2019 | — | — | — | — | — | — | — | +3.2% | +3.1% | +0.1% | −1.7% | +3.5% |
MMUIX Risk
Risk measures from monthly returns over Aug 2023 – Jul 2026.
- 3-year volatility (annualised): 15.44%
- 3-year Sharpe ratio: 0.37 (vs 4.5% risk-free rate)
- Best month: +10.52% (Feb 2026)
- Worst month: −7.84% (Dec 2024)
MMUIX Fund Flows
Monthly money in and out of MFS Utilities Fund, from SEC Form N-PORT.
- 12-month net flow: −$140.7M
- 12-month gross sales (incl. reinvestments): $306.8M
- Sales ÷ redemptions: 0.69×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jul 2026 | $14.7M | $35.7M | −$21.0M |
| Jun 2026 | $21.5M | $38.3M | −$16.8M |
| May 2026 | $12.6M | $30.5M | −$17.9M |
| Apr 2026 | $25.2M | $35.7M | −$10.5M |
| Mar 2026 | $34.1M | $37.2M | −$3.0M |
| Feb 2026 | $15.0M | $37.3M | −$22.4M |
| Jan 2026 | $19.4M | $35.9M | −$16.6M |
| Dec 2025 | $87.0M | $50.6M | $36.4M |
| Nov 2025 | $15.2M | $30.6M | −$15.4M |
| Oct 2025 | $21.7M | $39.3M | −$17.6M |
| Sep 2025 | $24.6M | $39.8M | −$15.2M |
| Aug 2025 | $15.9M | $36.7M | −$20.8M |
MMUIX Assets Under Management
Net assets of MFS Utilities Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-07-31 | $2.61B |
| 2026-04-30 | $2.82B |
| 2026-01-31 | $2.61B |
| 2025-10-31 | $2.68B |
| 2025-07-31 | $2.59B |
| 2025-04-30 | $2.45B |
| 2025-01-31 | $2.49B |
| 2024-10-31 | $2.69B |
| 2024-07-31 | $2.58B |
| 2024-04-30 | $2.43B |
| 2024-01-31 | $2.47B |
| 2023-10-31 | $2.50B |
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.