F/m Ultrashort Tax-Free Municipal ETF (ZMUN) Open Interest History

Open interest tracks the total number of outstanding options contracts. Rising OI alongside price moves can indicate growing commitment to the trend; declining OI suggests positions are being closed.

F/m Ultrashort Tax-Free Municipal ETF (ZMUN) operates in the Financial Services sector, specifically the Asset Management industry, with a market capitalization near $1.0M, listed on NASDAQ, carrying a beta of -0.00 to the broader market. The F/m Callable Tax-Free Municipal ETF is a passively-managed ETF seeking to track the price and yield performance of the Bloomberg Municipal Bond Currently Callable Index. public since 2025-09-30.

Open interest history tracks how outstanding options contracts change over time. No recent options activity for ZMUN as of 2026-06-02; this typically reflects low options liquidity, a recently listed name, or a temporary data feed delay. Snapshot will refresh on the next active session.

Learn how open interest is reported and how to read the data →