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 - Bonds industry, with a market capitalization near $1.0M, listed on NASDAQ, carrying a beta of -0.01 to the broader market. The F/m Callable Tax-Free Municipal ETF functions as a passively managed exchange-traded fund (ETF), aiming to mirror the price and yield characteristics 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 2026-07-17; 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 →