Vanguard S&P Small-Cap 600 ETF (VIOO) 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.

Vanguard S&P Small-Cap 600 ETF (VIOO) operates in the Financial Services sector, specifically the Asset Management - Global industry, with a market capitalization near $6.46B, listed on AMEX, carrying a beta of 1.08 to the broader market. This ETF invests in the S&P Small-Cap 600 Index, comprising 600 smaller U. public since 2010-09-09.

Open interest history tracks how outstanding options contracts change over time. No recent options activity for VIOO 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 →