Open Interest vs. Volume
Volume measures activity over a period. Open interest measures outstanding derivatives positions. Reading them together gives more context than either number alone.
Key idea
Volume tells you how busy the market was. Open interest tells you how much position exposure is still outstanding.
In this guide
Volume measures turnover
High volume means contracts changed hands frequently during the measured period. It does not tell you whether total open exposure increased.
Open interest measures outstanding positions
Open interest rises when new exposure is created faster than positions are closed and falls when existing positions are removed.
Use the combination as context
Price, volume, open interest and funding can describe different parts of the same market. None of them is a reliable forecast by itself.
Primary references
Documentation and standards
References added
Official technical references for further verification. A source link is not a guarantee that every earlier editorial sentence has been reverified; provider specifications may also change over time.
Originally published 2026-09-13 · Guide text last updated 2026-09-19 · Reference links and live examples updated 2026-10-24
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