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Performance
Performance Chart
The chart shows the growth of an initial investment of $10,000 in MFS Municipal Intermediate Fund, comparing it to the performance of the S&P 500 index or another benchmark. All prices have been adjusted for splits and dividends.
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Returns By Period
MFS Municipal Intermediate Fund (MIUIX) has returned -0.70% so far this year and 4.68% over the past 12 months.
MFS Municipal Intermediate Fund
- 1D
- 0.11%
- 1M
- -3.05%
- YTD
- -0.70%
- 6M
- 0.99%
- 1Y
- 4.68%
- 3Y*
- 3.78%
- 5Y*
- —
- 10Y*
- —
Benchmark (S&P 500 Index)
- 1D
- 2.91%
- 1M
- -5.09%
- YTD
- -4.63%
- 6M
- -2.39%
- 1Y
- 16.33%
- 3Y*
- 16.69%
- 5Y*
- 10.18%
- 10Y*
- 12.16%
Monthly Returns
Based on dividend-adjusted daily data since May 26, 2021, MIUIX's average daily return is 0.00%, while the average monthly return is +0.10%. At this rate, your investment would double in approximately 57.8 years.
Historically, 56% of months were positive and 44% were negative. The best month was Nov 2023 with a return of +5.3%, while the worst month was Sep 2022 at -3.5%. The longest winning streak lasted 7 consecutive months, and the longest losing streak was 4 months.
On a daily basis, MIUIX closed higher 33% of trading days. The best single day was Apr 10, 2025 with a return of +1.7%, while the worst single day was Apr 7, 2025 at -1.6%.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 1.07% | 1.35% | -3.05% | -0.70% | |||||||||
| 2025 | 0.85% | 1.44% | -1.11% | -0.17% | 0.21% | 0.86% | -0.01% | 0.87% | 1.84% | 1.07% | 0.30% | 0.32% | 6.64% |
| 2024 | 0.20% | 0.17% | -0.11% | -1.01% | -0.13% | 1.84% | 0.85% | 0.84% | 1.05% | -1.29% | 1.68% | -1.09% | 3.00% |
| 2023 | 2.91% | -2.26% | 2.05% | -0.22% | -1.03% | 0.71% | 0.26% | -1.21% | -2.26% | -1.37% | 5.29% | 2.51% | 5.19% |
| 2022 | -2.01% | -0.62% | -2.89% | -2.18% | 1.09% | -1.51% | 2.30% | -2.16% | -3.53% | -0.69% | 3.90% | 0.19% | -8.06% |
| 2021 | 0.10% | 0.10% | 0.70% | -0.30% | -0.79% | -0.27% | 0.30% | 0.01% | -0.17% |
Benchmark Metrics
MFS Municipal Intermediate Fund has an annualized alpha of 1.07%, beta of 0.01, and R² of 0.00 versus S&P 500 Index. Calculated based on daily prices since May 27, 2021.
- This fund participated in 32.29% of S&P 500 Index downside but only 19.07% of its upside — more exposed to losses than it benefited from rallies.
- Beta of 0.01 may look defensive, but with R² of 0.00 this fund is largely uncorrelated with S&P 500 Index — low beta reflects independence, not downside protection. See the Volatility section for a true picture of this fund's risk.
- R² of 0.00 means this fund moves largely independently of S&P 500 Index — capture ratios reflect limited market correlation rather than active downside protection. Consider using a more representative benchmark.
- Alpha
- 1.07%
- Beta
- 0.01
- R²
- 0.00
- Upside Capture
- 19.07%
- Downside Capture
- 32.29%
Expense Ratio
MIUIX has an expense ratio of 0.45%, placing it in the medium range.
Return for Risk
Risk / Return Rank
MIUIX ranks 70 for risk / return — better than 70% of mutual funds on our site. You're getting solid returns for the risk taken. A good sign, especially for investors who want growth without excessive volatility.
Return / Risk — by metrics
The table below present risk-adjusted performance metrics for MFS Municipal Intermediate Fund (MIUIX) and compare them to a chosen benchmark (S&P 500 Index).
| MIUIX | Benchmark | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 1.33 | 0.90 | +0.43 |
Sortino ratioReturn per unit of downside risk | 1.82 | 1.39 | +0.43 |
Omega ratioGain probability vs. loss probability | 1.37 | 1.21 | +0.16 |
Calmar ratioReturn relative to maximum drawdown | 1.44 | 1.40 | +0.04 |
Martin ratioReturn relative to average drawdown | 5.73 | 6.61 | -0.88 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
Explore MIUIX risk-adjusted metrics in detail
Dive deeper into individual metrics with historical trends, benchmark comparisons, and performance across different time periods.
Dividends
Dividend History
MFS Municipal Intermediate Fund provided a 3.69% dividend yield over the last twelve months, with an annual payout of $0.34 per share. The fund has been increasing its distributions for 4 consecutive years.
| Period | TTM | 2025 | 2024 | 2023 | 2022 | 2021 |
|---|---|---|---|---|---|---|
| Dividend | $0.34 | $0.45 | $0.33 | $0.22 | $0.12 | $0.06 |
Dividend yield | 3.69% | 4.82% | 3.61% | 2.39% | 1.30% | 0.64% |
Monthly Dividends
The table displays the monthly dividend distributions for MFS Municipal Intermediate Fund. The dividends shown in the table have been adjusted to account for any splits that may have occurred.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | $0.03 | $0.03 | $0.00 | $0.06 | |||||||||
| 2025 | $0.06 | $0.05 | $0.06 | $0.05 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.45 |
| 2024 | $0.03 | $0.03 | $0.00 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.05 | $0.03 | $0.33 |
| 2023 | $0.02 | $0.02 | $0.03 | $0.00 | $0.03 | $0.02 | $0.02 | $0.00 | $0.03 | $0.00 | $0.03 | $0.03 | $0.22 |
| 2022 | $0.00 | $0.00 | $0.00 | $0.02 | $0.00 | $0.00 | $0.00 | $0.02 | $0.02 | $0.02 | $0.02 | $0.03 | $0.12 |
| 2021 | $0.01 | $0.00 | $0.05 | $0.06 |
Drawdowns
Drawdowns Chart
The Drawdowns chart displays portfolio losses from any high point along the way. Drawdowns are calculated considering price movements and all distributions paid, if any.
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Worst Drawdowns
The table below displays the maximum drawdowns of the MFS Municipal Intermediate Fund. A maximum drawdown is a measure of risk, indicating the largest reduction in portfolio value due to a series of losing trades.
The maximum drawdown for the MFS Municipal Intermediate Fund was 12.91%, occurring on Oct 25, 2022. Recovery took 584 trading sessions.
The current MFS Municipal Intermediate Fund drawdown is 3.05%.
Depth | Start | To Bottom | Bottom | To Recover | End | Total |
|---|---|---|---|---|---|---|
| -12.91% | Aug 6, 2021 | 308 | Oct 25, 2022 | 584 | Feb 25, 2025 | 892 |
| -4.14% | Mar 3, 2025 | 28 | Apr 9, 2025 | 78 | Aug 1, 2025 | 106 |
| -3.15% | Mar 2, 2026 | 20 | Mar 27, 2026 | — | — | — |
| -0.64% | Sep 18, 2025 | 7 | Sep 26, 2025 | 10 | Oct 10, 2025 | 17 |
| -0.4% | Jun 17, 2021 | 5 | Jun 23, 2021 | 10 | Jul 8, 2021 | 15 |
Volatility
Volatility Chart
The chart below shows the rolling one-month volatility.
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