MTLBX Performance — MFS Municipal Limited Maturity Fund, Class B
Data updated: 2026-09-28
MTLBX returned −0.01% year to date and +2.24% over one year to Jul 2026. Annualised returns are +2.87% over 3 years and +0.53% over 5 years. The fund trailed its Short-Term Municipal Bond category average: $100 invested three years ago grew to $109, against $110 for the category, and to $102 over one year, against $103. Volatility over the past three years was 2.78% a year. In the 12 months to Jul 2026 the fund took in a net $347.6M, and assets reached $3.09B.
MTLBX Growth of $100
What $100 invested in MFS Municipal Limited Maturity Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Short-Term Municipal Bond category average over the same months.
| Period | MTLBX | Category average |
|---|---|---|
| 1 year (Aug 2025 – Jul 2026) | $102 | $103 |
| 3 years (Aug 2023 – Jul 2026) | $109 | $110 |
| 5 years (Aug 2021 – Jul 2026) | $103 | $108 |
| Since data start (Aug 2019 – Jul 2026) | $107 | $112 |
MTLBX Trailing Returns
Total returns to Jul 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | −0.01% |
| 1 year | +2.24% |
| 3 years (annualised) | +2.87% |
| 5 years (annualised) | +0.53% |
MTLBX Annual Returns
Calendar-year total returns of MFS Municipal Limited Maturity Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jul) | −0.01% |
| 2025 | +4.16% |
| 2024 | +2.14% |
| 2023 | +3.59% |
| 2022 | −6.01% |
| 2021 | −0.02% |
| 2020 | +2.38% |
| 2019 (Aug–Dec) | +0.66% |
MTLBX 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 | +0.7% | +0.8% | −1.8% | +0.6% | +0.2% | +0.4% | −0.9% | — | — | — | — | — |
| 2025 | +0.6% | +0.7% | −0.6% | −0.3% | +0.3% | +0.8% | +0.3% | +0.6% | +0.9% | +0.3% | +0.2% | +0.2% |
| 2024 | +0.1% | +0.2% | 0.0% | −0.6% | −0.1% | +0.9% | +0.7% | +0.9% | +0.7% | −0.8% | +0.7% | −0.6% |
| 2023 | +1.7% | −1.5% | +1.3% | −0.3% | −0.6% | +0.5% | +0.3% | −0.4% | −1.1% | −0.2% | +2.8% | +1.3% |
| 2022 | −2.0% | −0.5% | −2.0% | −1.5% | +0.8% | −0.6% | +1.5% | −1.6% | −2.2% | −0.4% | +2.2% | +0.2% |
| 2021 | +0.5% | −1.0% | +0.2% | +0.4% | +0.2% | +0.1% | +0.5% | −0.2% | −0.7% | −0.2% | +0.2% | 0.0% |
| 2020 | +1.1% | +0.7% | −3.5% | −0.8% | +2.0% | +0.8% | +1.1% | 0.0% | +0.1% | −0.3% | +0.9% | +0.4% |
| 2019 | — | — | — | — | — | — | — | +0.8% | −0.6% | +0.1% | +0.1% | +0.2% |
MTLBX Risk
Risk measures from monthly returns over Aug 2023 – Jul 2026.
- 3-year volatility (annualised): 2.78%
- 3-year Sharpe ratio: -0.59 (vs 4.5% risk-free rate)
- Best month: +2.78% (Nov 2023)
- Worst month: −1.76% (Mar 2026)
MTLBX Fund Flows
Monthly money in and out of MFS Municipal Limited Maturity Fund, from SEC Form N-PORT.
- 12-month net flow: $347.6M
- 12-month gross sales (incl. reinvestments): $1.1B
- Sales ÷ redemptions: 1.49×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jul 2026 | $69.9M | $62.4M | $7.4M |
| Jun 2026 | $62.7M | $53.9M | $8.8M |
| May 2026 | $76.8M | $80.5M | −$3.8M |
| Apr 2026 | $110.9M | $64.6M | $46.3M |
| Mar 2026 | $76.4M | $71.1M | $5.4M |
| Feb 2026 | $70.2M | $49.6M | $20.6M |
| Jan 2026 | $101.4M | $57.7M | $43.7M |
| Dec 2025 | $121.4M | $64.8M | $56.5M |
| Nov 2025 | $93.6M | $48.4M | $45.3M |
| Oct 2025 | $97.5M | $56.4M | $41.1M |
| Sep 2025 | $80.0M | $52.1M | $27.9M |
| Aug 2025 | $96.5M | $48.2M | $48.3M |
MTLBX Assets Under Management
Net assets of MFS Municipal Limited Maturity Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-07-31 | $3.09B |
| 2026-04-30 | $3.11B |
| 2026-01-31 | $3.07B |
| 2025-10-31 | $2.91B |
| 2025-07-31 | $2.76B |
| 2025-04-30 | $2.63B |
| 2025-01-31 | $2.66B |
| 2024-10-31 | $2.56B |
| 2024-07-31 | $2.61B |
| 2024-04-30 | $2.60B |
| 2024-01-31 | $2.67B |
| 2023-10-31 | $2.61B |
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.