Every stock perp reports 24-hour volume and open interest. They are easy to confuse because both are dollar figures about the same market. They measure different things, and comparing them says more than either does alone.
What each one counts
Volume is the value of contracts that changed hands over the last 24 hours. A position opened and closed within the hour adds to volume twice and leaves nothing behind. Open interest is the value of contracts open right now. It counts positions that are still being held. The distinction is the same one made for options in volume versus open interest.
Divide the day’s volume by open interest. The result is how many times the open positions turned over, roughly speaking. A high ratio means a lot of trading against a small base of held positions. A low ratio means positions are sitting, with little trading around them.
High volume, flat open interest
Heavy trading with open interest unchanged is churn. Traders are passing the same exposure back and forth, or opening and closing inside the day. The move that comes with it has activity behind it and little new commitment. Nobody has added a position they intend to keep.
Open interest rising on modest volume
This is a market being built. Positions are opened and held. It is the quieter of the two patterns and often the more informative. Combine it with price to see which way the new positions lean, as open interest against price sets out, and with funding to see which side is paying.
High volume, falling open interest
Positions are being closed in size. On a sharp price move this is consistent with stops and liquidations, and it can also be traders taking profit by choice. The numbers do not say which. Open interest without price discusses how far the figure can be pushed without more context.
What is specific to stock perps
The 24-hour window is not uniform. A window that covers a weekday session contains hours when the stock market was open and perp traders had a live reference. A window that covers a Sunday contains none. Weekend volume is normally lower, so the ratio falls on a weekend with no change in anyone’s behavior. Compare a weekend with other weekends.
These are also separate books. Volume and open interest are read per book and never added across books that share a ticker. And the markets are young, so a normal ratio for a given name is still being established. NoVo’s collector has recorded each market since 4 October 2026, and the dashboards label an average with the span it really covers.
Where to see it
The Stocks On-Chain tab of the Crypto Market Map shows volume, open interest and the change in open interest for every stock and index perp, in adjacent columns.