MBNYX Performance — MFS New York Municipal Bond Fund, Class B
Data updated: 2026-08-25
MBNYX returned +2.61% year to date and +7.29% over one year to Jun 2026. Annualised returns are +3.56% over 3 years and −0.11% over 5 years. The fund trailed its Long-Term Municipal Bond category average: $100 invested three years ago grew to $111, against $112 for the category, and to $107 over one year, against $108. Volatility over the past three years was 7.07% a year. In the 12 months to Jun 2026 the fund took in a net $7.6M, and assets reached $189.12M.
MBNYX Growth of $100
What $100 invested in MFS New York 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 | MBNYX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $107 | $108 |
| 3 years (Jul 2023 – Jun 2026) | $111 | $112 |
| 5 years (Jul 2021 – Jun 2026) | $99 | $103 |
| Since data start (Jul 2019 – Jun 2026) | $107 | $113 |
MBNYX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +2.61% |
| 1 year | +7.29% |
| 3 years (annualised) | +3.56% |
| 5 years (annualised) | −0.11% |
MBNYX Annual Returns
Calendar-year total returns of MFS New York Municipal Bond Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +2.61% |
| 2025 | +2.21% |
| 2024 | +2.44% |
| 2023 | +6.45% |
| 2022 | −12.92% |
| 2021 | +2.22% |
| 2020 | +3.02% |
| 2019 (Jul–Dec) | +1.77% |
MBNYX 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% | +1.5% | −2.3% | +1.4% | +0.4% | +1.1% | — | — | — | — | — | — |
| 2025 | +0.1% | +1.0% | −2.1% | −0.7% | −1.1% | +0.5% | −1.1% | +0.9% | +3.5% | +1.3% | +0.2% | −0.4% |
| 2024 | 0.0% | 0.0% | 0.0% | −1.4% | +0.1% | +2.4% | +0.8% | +0.6% | +1.2% | −1.5% | +2.0% | −1.9% |
| 2023 | +3.7% | −3.0% | +2.2% | +0.2% | −0.7% | +0.6% | +0.1% | −1.9% | −3.6% | −2.1% | +7.8% | +3.4% |
| 2022 | −2.7% | −0.8% | −3.7% | −3.3% | +1.2% | −2.7% | +2.9% | −3.2% | −4.6% | −1.6% | +5.8% | −0.5% |
| 2021 | +1.0% | −1.5% | +0.6% | +1.1% | +0.7% | +0.5% | +0.8% | −0.6% | −1.0% | −0.3% | +0.9% | +0.1% |
| 2020 | +1.8% | +1.6% | −5.7% | −2.5% | +2.8% | +1.6% | +1.6% | −0.7% | −0.2% | −0.3% | +2.1% | +1.0% |
| 2019 | — | — | — | — | — | — | +0.6% | +1.9% | −0.8% | −0.2% | +0.1% | +0.2% |
MBNYX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 7.07%
- 3-year Sharpe ratio: -0.13 (vs 4.5% risk-free rate)
- Best month: +7.82% (Nov 2023)
- Worst month: −3.58% (Sep 2023)
MBNYX Fund Flows
Monthly money in and out of MFS New York Municipal Bond Fund, from SEC Form N-PORT.
- 12-month net flow: $7.6M
- 12-month gross sales (incl. reinvestments): $52.6M
- Sales ÷ redemptions: 1.17×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $4.1M | $4.3M | −$169K |
| May 2026 | $2.5M | $3.6M | −$1.1M |
| Apr 2026 | $2.6M | $3.3M | −$673K |
| Mar 2026 | $4.6M | $3.4M | $1.2M |
| Feb 2026 | $2.8M | $3.2M | −$375K |
| Jan 2026 | $1.9M | $2.3M | −$386K |
| Dec 2025 | $12.6M | $6.5M | $6.1M |
| Nov 2025 | $3.9M | $4.8M | −$845K |
| Oct 2025 | $2.7M | $2.3M | $431K |
| Sep 2025 | $5.9M | $2.4M | $3.6M |
| Aug 2025 | $4.8M | $3.2M | $1.6M |
| Jul 2025 | $4.1M | $5.8M | −$1.7M |
MBNYX Assets Under Management
Net assets of MFS New York Municipal Bond Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $189.12M |
| 2026-03-31 | $186.72M |
| 2025-12-31 | $188.26M |
| 2025-09-30 | $181.66M |
| 2025-06-30 | $173.78M |
| 2025-03-31 | $180.42M |
| 2024-12-31 | $176.36M |
| 2024-09-30 | $180.27M |
| 2024-06-30 | $173.55M |
| 2024-03-31 | $172.05M |
| 2023-12-31 | $171.67M |
| 2023-09-30 | $156.55M |
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.