MIUAX — MFS Municipal Intermediate Fund
Data updated: 2026-08-25
MIUAX — MFS Municipal Intermediate Fund. Long Municipal - National Bond · $435.63M AUM · 0.70% expense ratio. Holdings, fees, performance and SEC filings.
MIUAX Fund Overview
MIUAX — MFS Municipal Intermediate Fund is a US mutual fund managed by Mfs Municipal Series Trust, categorised as Long 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 Municipal Series Trust
- Category: Long Municipal - National Bond
- Assets under management: $435.63M
- 1-year return: 6.3%
- Ticker: MIUAX
- SEC CIK: 0000751656
- SEC series ID: S000071695
- Share class ID: C000227170
MIUAX Holdings
Top 10 holdings of MFS Municipal Intermediate Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| MFS Institutional Money Market Portfolio | 3.38% |
| Central Texas Regional Mobility Authority | 0.52% |
| Black Belt Energy Gas District | 0.48% |
| Black Belt Energy Gas District | 0.47% |
| Public Finance Authority | 0.46% |
| Black Belt Energy Gas District | 0.45% |
| Massachusetts Development Finance Agency | 0.45% |
| Massachusetts Development Finance Agency | 0.42% |
| Vermont Student Assistance Corp. | 0.42% |
| California Community Choice Financing Authority | 0.41% |
MIUAX Portfolio Allocation
Asset-class allocation of MFS Municipal Intermediate Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 95.7% |
| Cash & Equivalents | 3.4% |
| Securitized | 0.2% |
MIUAX Performance
Total returns for MIUAX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 1.9% |
| 1 year | 6.3% |
| 3 years (annualised) | 4.5% |
| 5 years (annualised) | 1.5% |
MIUAX Risk Information
Risk metrics for MIUAX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.7%
MIUAX Costs and Fees
MIUAX costs about $70 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.70%
- Gross expense ratio: 0.79%
- Portfolio turnover: 10%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
MIUAX Cashflows
Over the 12 months to 2026-06, MFS Municipal Intermediate Fund had net inflows of $137.83M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $16.43M |
| 2026-05 | $8.83M |
| 2026-04 | $19.52M |
| 2026-03 | $8.82M |
| 2026-02 | $9.25M |
| 2026-01 | $10.11M |
MIUAX Debt Constituents
Largest debt holdings of MFS Municipal Intermediate Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Central Texas Regional Mobility Authority | 0.52% |
| Black Belt Energy Gas District | 0.48% |
| Black Belt Energy Gas District | 0.47% |
| Public Finance Authority | 0.46% |
| Black Belt Energy Gas District | 0.45% |
| Massachusetts Development Finance Agency | 0.45% |
| Massachusetts Development Finance Agency | 0.42% |
| Vermont Student Assistance Corp. | 0.42% |
| California Community Choice Financing Authority | 0.41% |
| Park Creek Metropolitan District | 0.41% |
MIUAX Prospectus and SEC Filings
Official MFS Municipal Intermediate Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-07-28
- Prospectus (485BPOS) — filed 2025-07-28
- Prospectus (485BPOS) — filed 2024-07-26
- Portfolio holdings (N-PORT) — filed 2026-08-25
- Portfolio holdings (N-PORT) — filed 2026-05-26
- Portfolio holdings (N-PORT) — filed 2026-02-25
- Annual census (N-CEN) — filed 2026-06-11
- Annual census (N-CEN) — filed 2025-06-11
Related Funds
Other Long 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.