FMBIX — Fidelity Municipal Bond Index Fund
Data updated: 2025-05-27
FMBIX — Fidelity Municipal Bond Index Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Long Municipal - National Bond · $174.92M AUM · 0.07% expense ratio · 0.9% 1-yr return. From SEC regulatory filings.
FMBIX Fund Overview
FMBIX — Fidelity Municipal Bond Index Fund is a US mutual fund managed by Fidelity Salem Street 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: Fidelity Salem Street Trust
- Category: Long Municipal - National Bond
- Assets under management: $174.92M
- 1-year return: 0.9%
- Ticker: FMBIX
- SEC CIK: 0000035315
- SEC series ID: S000065746
- Share class ID: C000212594
FMBIX Holdings
Top 10 holdings of Fidelity Municipal Bond Index Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| New York Ny Cty Mun Wtr Fin Au | 2.67% |
| California Cmnty Choice Fing Auth Clean Energy Proj Rev | 1.66% |
| PORT AUTH NY and NJ | 1.57% |
| Washington St | 1.34% |
| Illinois St | 1.32% |
| California St Pub Wks Brd Lse | 1.18% |
| California St Pub Wks Brd Lse | 1.05% |
| New York St Dorm Auth St Persincome Tax Rev | 0.90% |
| SALT RIVER PROJ AZ AGRIC and PWR | 0.88% |
| Pennsylvania St Tpk Commn Tpk | 0.87% |
FMBIX Portfolio Allocation
Asset-class allocation of Fidelity Municipal Bond Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 98.3% |
| Cash & Equivalents | 0.7% |
FMBIX Performance
Total returns for FMBIX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| 1 year | 0.9% |
| 3 years (annualised) | 0.9% |
| 5 years (annualised) | 0.3% |
FMBIX Risk Information
Risk metrics for FMBIX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 4.6%
FMBIX Costs and Fees
FMBIX costs about $7 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.07%
- Gross expense ratio: 0.07%
- Portfolio turnover: 15%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
FMBIX Cashflows
Over the 12 months to 2025-03, Fidelity Municipal Bond Index Fund had net inflows of $22.69M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2025-03 | −$6.70M |
| 2025-02 | $546.51K |
| 2025-01 | $5.57M |
| 2024-12 | $2.52M |
| 2024-11 | −$634.97K |
| 2024-10 | $3.13M |
FMBIX Debt Constituents
Largest debt holdings of Fidelity Municipal Bond Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| New York Ny Cty Mun Wtr Fin Au | 2.67% |
| California Cmnty Choice Fing Auth Clean Energy Proj Rev | 1.66% |
| PORT AUTH NY and NJ | 1.57% |
| Washington St | 1.34% |
| Illinois St | 1.32% |
| California St Pub Wks Brd Lse | 1.18% |
| California St Pub Wks Brd Lse | 1.05% |
| New York St Dorm Auth St Persincome Tax Rev | 0.90% |
| SALT RIVER PROJ AZ AGRIC and PWR | 0.88% |
| Pennsylvania St Tpk Commn Tpk | 0.87% |
FMBIX Prospectus and SEC Filings
Official Fidelity Municipal Bond Index Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
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.