Open interest is the value of contracts currently open on a market. Read against price, it sorts a move into four kinds. The framework comes from futures and is used across crypto. It applies to stock perps too, with some care, because these markets are new and that changes what a rise in open interest means.
The four readings
Price up with open interest up suggests new positions are being opened into the rise. Price up with open interest down suggests shorts closing. Price down with open interest up suggests new positions opened into the fall. Price down with open interest down suggests longs closing. The price and open interest quadrant takes each in turn.
Every open contract has a long and a short, so open interest alone never says which side started it. Price supplies the direction. Funding and the premium say which side is paying.
First bend: a growing market
On an old market, open interest rising means traders are adding. On a new market it can simply mean more traders have found it. Stock perps are young. Some of the rise in open interest on any given week may be the market itself growing. That is adoption. It says little about how the crowd is leaning on the stock.
Second bend: dollars move with price
Open interest is usually shown in dollars. If a stock rises a few percent and no contract is opened or closed, the dollar figure rises by the same few percent. So a small rise in open interest alongside a rise in price can be nothing at all. The change has to outrun the price move before it says anything about new positions.
Third bend: positions changing books
One ticker can list on several separate books. If traders move from one book to another, open interest falls on the first and rises on the second. Neither change is a view on the stock. Each book is read alone, as one ticker, several books explains, and a move on one row is worth checking against the others.
It needs a history
All of this compares open interest now with open interest earlier. The venue serves price history and funding history. It does not serve open-interest history. The only way to have yesterday’s figure is to have recorded it, which is the point of the open interest history the venue does not serve.
NoVo’s collector has recorded open interest on every stock and index perp, every pass, since 4 October 2026. A change is shown with the span it really covers.
Where to see it
The Stocks On-Chain tab of the Crypto Market Map shows open interest, its change and a chart of it for each stock and index perp, beside the 24-hour price change. Reading the two columns together is the quadrant.