MTLBX — MFS Municipal Limited Maturity Fund
Data updated: 2026-07-13
MTLBX — MFS Municipal Limited Maturity Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Intermediate Municipal - National Bond · $3.11B AUM · 1.34% expense ratio · 4.0% 1-yr return. From SEC regulatory filings.
MTLBX Fund Overview
MTLBX — MFS Municipal Limited Maturity Fund is a US mutual fund managed by Mfs Series Trust IX, categorised as Intermediate Municipal - National Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Mfs Series Trust IX
- Category: Intermediate Municipal - National Bond
- Assets under management: $3.11B
- 1-year return: 4.0%
- Ticker: MTLBX
- SEC CIK: 0000063075
- SEC series ID: S000002496
- Share class ID: C000006758
MTLBX Holdings
Top 10 holdings of MFS Municipal Limited Maturity Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| MFS Institutional Money Market Portfolio | 3.62% |
| Dallas Fort Worth International Airport | 0.82% |
| Collier County Industrial Development Authority | 0.71% |
| California Community Choice Financing Authority | 0.71% |
| California Community Choice Financing Authority | 0.71% |
| Tennessee Energy Acquisition Corp. | 0.63% |
| Wisconsin Health & Educational Facilities Authority | 0.60% |
| San Francisco City & County Airport Comm-San Francisco International Airport | 0.59% |
| Colorado Health Facilities Authority | 0.58% |
| Tennergy Corp. | 0.54% |
MTLBX Portfolio Allocation
Asset-class allocation of MFS Municipal Limited Maturity Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 96.9% |
| Cash & Equivalents | 3.6% |
| Securitized | 0.2% |
MTLBX Performance
Total returns for MTLBX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 0.3% |
| 1 year | 4.0% |
| 3 years (annualised) | 3.0% |
| 5 years (annualised) | 0.7% |
MTLBX Risk Information
Risk metrics for MTLBX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 2.4%
MTLBX Costs and Fees
MTLBX costs about $134 per $10,000 invested per year in fund expenses.
- Net expense ratio: 1.34%
- Gross expense ratio: 1.47%
- Portfolio turnover: 29%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
MTLBX Cashflows
Over the 12 months to 2026-04, MFS Municipal Limited Maturity Fund had net inflows of $436.95M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-04 | $46.29M |
| 2026-03 | $5.38M |
| 2026-02 | $20.61M |
| 2026-01 | $43.68M |
| 2025-12 | $56.53M |
| 2025-11 | $45.27M |
MTLBX Debt Constituents
Largest debt holdings of MFS Municipal Limited Maturity Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Dallas Fort Worth International Airport | 0.82% |
| Collier County Industrial Development Authority | 0.71% |
| California Community Choice Financing Authority | 0.71% |
| California Community Choice Financing Authority | 0.71% |
| Tennessee Energy Acquisition Corp. | 0.63% |
| Wisconsin Health & Educational Facilities Authority | 0.60% |
| San Francisco City & County Airport Comm-San Francisco International Airport | 0.59% |
| Colorado Health Facilities Authority | 0.58% |
| Tennergy Corp. | 0.54% |
| Tarrant County Cultural Education Facilities Finance Corp. | 0.53% |
MTLBX Prospectus and SEC Filings
Official MFS Municipal Limited Maturity Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Intermediate Municipal - National Bond funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.