MBWVX Performance — MFS West Virginia Municipal Bond Fund, Class B
Data updated: 2026-08-25
MBWVX returned +2.24% year to date and +6.88% over one year to Jun 2026. Annualised returns are +2.99% over 3 years and +0.07% over 5 years. The fund trailed its Long-Term Municipal Bond category average: $100 invested three years ago grew to $109, against $112 for the category, and to $107 over one year, against $108. Volatility over the past three years was 6.37% a year. In the 12 months to Jun 2026 the fund lost a net $6.6M, and assets reached $82.90M.
MBWVX Growth of $100
What $100 invested in MFS West Virginia 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 | MBWVX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $107 | $108 |
| 3 years (Jul 2023 – Jun 2026) | $109 | $112 |
| 5 years (Jul 2021 – Jun 2026) | $100 | $103 |
| Since data start (Jul 2019 – Jun 2026) | $106 | $113 |
MBWVX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +2.24% |
| 1 year | +6.88% |
| 3 years (annualised) | +2.99% |
| 5 years (annualised) | +0.07% |
MBWVX Annual Returns
Calendar-year total returns of MFS West Virginia Municipal Bond Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +2.24% |
| 2025 | +2.53% |
| 2024 | +1.18% |
| 2023 | +5.21% |
| 2022 | −10.05% |
| 2021 | +1.27% |
| 2020 | +3.30% |
| 2019 (Jul–Dec) | +1.40% |
MBWVX 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 | +0.2% | +1.5% | −2.1% | +1.3% | +0.5% | +0.9% | — | — | — | — | — | — |
| 2025 | +0.1% | +1.0% | −2.0% | −0.6% | −1.0% | +0.6% | −1.1% | +0.8% | +3.6% | +1.3% | +0.1% | −0.2% |
| 2024 | −0.2% | −0.1% | −0.1% | −1.3% | −0.2% | +1.9% | +0.8% | +0.6% | +1.1% | −1.4% | +1.8% | −1.6% |
| 2023 | +3.4% | −2.7% | +1.8% | 0.0% | −0.8% | +0.6% | +0.3% | −1.8% | −3.2% | −1.7% | +7.0% | +2.7% |
| 2022 | −2.1% | −0.4% | −2.8% | −3.0% | +1.1% | −2.4% | +2.6% | −2.7% | −4.3% | −0.9% | +5.1% | −0.3% |
| 2021 | +0.4% | −1.1% | +0.2% | +0.8% | +0.5% | +0.4% | +0.7% | −0.5% | −0.7% | −0.3% | +0.7% | +0.1% |
| 2020 | +1.4% | +1.1% | −3.5% | −1.6% | +2.6% | +0.9% | +1.1% | −0.4% | +0.1% | −0.4% | +1.4% | +0.6% |
| 2019 | — | — | — | — | — | — | +0.5% | +1.3% | −0.4% | −0.2% | +0.1% | +0.2% |
MBWVX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 6.37%
- 3-year Sharpe ratio: -0.24 (vs 4.5% risk-free rate)
- Best month: +7.04% (Nov 2023)
- Worst month: −3.25% (Sep 2023)
MBWVX Fund Flows
Monthly money in and out of MFS West Virginia Municipal Bond Fund, from SEC Form N-PORT.
- 12-month net flow: −$6.6M
- 12-month gross sales (incl. reinvestments): $11.2M
- Sales ÷ redemptions: 0.63×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $421K | $422K | −$1K |
| May 2026 | $1.3M | $3.7M | −$2.5M |
| Apr 2026 | $797K | $714K | $83K |
| Mar 2026 | $1.3M | $2.0M | −$633K |
| Feb 2026 | $662K | $1.1M | −$460K |
| Jan 2026 | $932K | $892K | $41K |
| Dec 2025 | $2.0M | $3.4M | −$1.5M |
| Nov 2025 | $891K | $824K | $67K |
| Oct 2025 | $679K | $1.1M | −$451K |
| Sep 2025 | $1.2M | $461K | $715K |
| Aug 2025 | $446K | $1.9M | −$1.5M |
| Jul 2025 | $585K | $1.1M | −$560K |
MBWVX Assets Under Management
Net assets of MFS West Virginia Municipal Bond Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $82.90M |
| 2026-03-31 | $83.62M |
| 2025-12-31 | $85.60M |
| 2025-09-30 | $86.91M |
| 2025-06-30 | $86.01M |
| 2025-03-31 | $90.58M |
| 2024-12-31 | $91.57M |
| 2024-09-30 | $97.41M |
| 2024-06-30 | $94.52M |
| 2024-03-31 | $93.95M |
| 2023-12-31 | $93.44M |
| 2023-09-30 | $90.17M |
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.