MBABX Performance — MFS Alabama Municipal Bond Fund, Class B
Data updated: 2026-08-25
MBABX returned +2.42% year to date and +7.13% over one year to Jun 2026. Annualised returns are +3.26% over 3 years and −0.17% over 5 years. The fund trailed its Long-Term Municipal Bond category average: $100 invested three years ago grew to $110, against $112 for the category, and to $107 over one year, against $108. Volatility over the past three years was 6.66% a year. In the 12 months to Jun 2026 the fund took in a net $2.4M, and assets reached $72.34M.
MBABX Growth of $100
What $100 invested in MFS Alabama Municipal Bond Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Long-Term Municipal Bond category average over the same months.
| Period | MBABX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $107 | $108 |
| 3 years (Jul 2023 – Jun 2026) | $110 | $112 |
| 5 years (Jul 2021 – Jun 2026) | $99 | $103 |
| Since data start (Jul 2019 – Jun 2026) | $105 | $113 |
MBABX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +2.42% |
| 1 year | +7.13% |
| 3 years (annualised) | +3.26% |
| 5 years (annualised) | −0.17% |
MBABX Annual Returns
Calendar-year total returns of MFS Alabama Municipal Bond Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +2.42% |
| 2025 | +2.61% |
| 2024 | +0.92% |
| 2023 | +5.62% |
| 2022 | −11.46% |
| 2021 | +1.10% |
| 2020 | +3.26% |
| 2019 (Jul–Dec) | +1.79% |
MBABX 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 | +0.4% | +1.6% | −2.4% | +1.3% | +0.5% | +1.1% | — | — | — | — | — | — |
| 2025 | 0.0% | +1.1% | −2.1% | −0.7% | −0.7% | +0.4% | −0.9% | +0.8% | +3.2% | +1.3% | +0.3% | −0.1% |
| 2024 | −0.1% | −0.1% | −0.1% | −1.7% | +0.1% | +2.1% | +0.9% | +0.5% | +1.0% | −1.7% | +1.8% | −1.7% |
| 2023 | +3.3% | −2.8% | +1.9% | 0.0% | −0.9% | +0.4% | +0.1% | −1.3% | −3.4% | −1.7% | +7.6% | +2.9% |
| 2022 | −2.6% | −0.6% | −3.1% | −3.1% | +1.0% | −2.3% | +2.5% | −3.0% | −4.9% | −1.0% | +5.7% | −0.4% |
| 2021 | +0.6% | −1.5% | +0.5% | +1.0% | +0.4% | +0.2% | +0.7% | −0.4% | −1.0% | −0.2% | +0.8% | +0.1% |
| 2020 | +1.7% | +1.3% | −4.3% | −1.9% | +3.2% | +0.8% | +1.3% | −0.5% | −0.1% | −0.3% | +1.7% | +0.7% |
| 2019 | — | — | — | — | — | — | +0.5% | +1.7% | −0.6% | −0.2% | +0.1% | +0.2% |
MBABX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 6.66%
- 3-year Sharpe ratio: -0.19 (vs 4.5% risk-free rate)
- Best month: +7.60% (Nov 2023)
- Worst month: −3.41% (Sep 2023)
MBABX Fund Flows
Monthly money in and out of MFS Alabama Municipal Bond Fund, from SEC Form N-PORT.
- 12-month net flow: $2.4M
- 12-month gross sales (incl. reinvestments): $18.0M
- Sales ÷ redemptions: 1.15×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $1.3M | $857K | $492K |
| May 2026 | $1.4M | $924K | $466K |
| Apr 2026 | $965K | $1.7M | −$761K |
| Mar 2026 | $2.3M | $1.3M | $1.0M |
| Feb 2026 | $1.4M | $897K | $481K |
| Jan 2026 | $1.0M | $764K | $263K |
| Dec 2025 | $1.1M | $1.7M | −$622K |
| Nov 2025 | $3.6M | $2.1M | $1.5M |
| Oct 2025 | $1.0M | $894K | $108K |
| Sep 2025 | $1.7M | $1.5M | $227K |
| Aug 2025 | $990K | $1.7M | −$664K |
| Jul 2025 | $1.3M | $1.4M | −$85K |
MBABX Assets Under Management
Net assets of MFS Alabama Municipal Bond Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $72.34M |
| 2026-03-31 | $70.57M |
| 2025-12-31 | $69.55M |
| 2025-09-30 | $68.03M |
| 2025-06-30 | $66.98M |
| 2025-03-31 | $69.48M |
| 2024-12-31 | $71.05M |
| 2024-09-30 | $73.36M |
| 2024-06-30 | $69.62M |
| 2024-03-31 | $67.16M |
| 2023-12-31 | $66.46M |
| 2023-09-30 | $63.57M |
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.