MFSX - MFS Active Short Muni Bond ETF
This fund seeks to provide a high level of current income that is exempt from federal income tax. It is an actively managed exchange-traded fund that invests primarily in a portfolio of short-term, investment-grade municipal bonds. The fund's managers select securities based on their assessment of the issuer's credit quality, the instrument's terms, and prevailing market and economic conditions to manage interest rate sensitivity and credit risk.
- Sector
- Financial Services
- Industry
- Asset Management
- Market Cap
- $14.9M
- Beta
- 0.00
- 52-Week Range
- 24.58-26.06
- Dividend Yield
- $0.04
- IPO Date
- Sep 10, 2026
- Exchange
- AMEX
MFSX Options Snapshot
Options pricing data for MFSX is refreshed daily after the close. When listed contracts exist, this page surfaces the latest at-the-money implied volatility, max pain strike, dealer gamma exposure (GEX), and 25-delta skew. Listed contracts and live snapshots appear once the options chain has been published by the exchange for the most recent session.
What This Page Covers
The MFSX overview links into per-metric analysis views: max pain, gamma exposure, volatility skew, expected move, options chain, open interest history, and aggregate Greeks. Microstructure data is available on short interest, short volume, fail-to-deliver, and market structure.
MFSX fund facts: expense ratio 0.25%, assets under management $19.7M, NAV $24.62 as of the data source's update on Oct 8, 2026, launched Sep 10, 2026, issued by MFS. See the MFSX holdings.
Frequently asked MFSX overview questions
- What is MFSX?
- MFSX is the ticker symbol for MFS Active Short Muni Bond ETF, an listed exchange-traded fund. This fund seeks to provide a high level of current income that is exempt from federal income tax. It is an actively managed exchange-traded fund that invests primarily in a portfolio of short-term, investment-grade municipal bonds. Listed on AMEX. MFSX is the ETF ticker shown on this page; ETF traders use the fund for diversified exposure to its underlying basket, for sector and factor rotation, and for hedging or replication strategies via the listed options chain.
- What are MFSX's key statistics?
- MFS Active Short Muni Bond ETF (MFSX) carries a market capitalization of $14.9M, 52-week range of 24.58-26.06. Full holdings disclosure, expense ratio, and tracking-error history live on the per-ticker fundamentals page or the sponsor's site; daily NAV and premium/discount-to-NAV are accessible from the same view. These structural inputs frame how the ETF options market prices implied volatility relative to its constituents.
- What sector or industry does MFSX belong to?
- MFS Active Short Muni Bond ETF operates in the Financial Services sector, in the Asset Management industry. Sector classification affects how the ticker correlates with sector ETFs, how it reacts to macro factors like rate moves and commodity prices, and how its options pricing compares to sector peers. Compare MFSX's implied volatility and skew against sector benchmarks to gauge whether the options market is pricing single-name or systemic risk relative to the broader peer group.
- How current is the MFSX data on this page?
- Options snapshots refresh after each trading session; if no snapshot is currently posted for MFSX, it usually reflects low options liquidity or a recently listed name. Fund-level fields (sponsor, expense ratio, holdings concentration where available) refresh from the vendor feed nightly. ETF-specific filings (N-CSR, N-PX, N-CEN) update on the SEC EDGAR cadence. FINRA microstructure data refreshes on the source's cadence; for ETFs the off-exchange volume signal is dominated by authorized-participant creation and redemption rather than directional flow.