Open Interest in Crypto: A Leverage Gauge

Paired with price, open interest produces four classic readings. Price up, open interest up: new money entering a trend, leverage building. Price up, open interest down: short covering, the move powered by exit. Price down, open interest up: new shorts entering, bearish conviction. Price down, open interest down: long liquidation, often forced. Each describes what happened, not what will happen next.

The utility of open interest becomes clearest in a leverage unwind. Phase one: open interest builds steadily alongside price, funding turns positive, and leverage accumulates. Phase two: price stalls but open interest stays high, a sign that exhausted positions are waiting for a catalyst. Phase three: a trigger, often a macro print or a large spot sale, pushes price into the first cluster of liquidation levels. Phase four: a cascade, with open interest collapsing as thousands of positions are extinguished. The October 10, 2025 episode, roughly $19 billion liquidated, is the canonical example. Phase five: the aftermath, with open interest far lower and the system structurally calmer.

Open interest has limits. It is directionless: high leverage can break either way. It says nothing about position size distribution or purpose. A large share of open interest is not speculative–market makers, basis traders, and miners hold positions without directional views. Venue fragmentation means aggregates are estimates, not exact counts. And open interest lags the event: by the time it confirms a cascade, the damage is done.

In crypto, the dominance of perpetual futures makes open interest especially consequential. Perp volume reached roughly $61.8 trillion in 2025, according to CryptoQuant, dwarfing spot. The aggregate figure functions as a rough gauge of how much borrowed exposure sits in the system. Used as a context tool, it answers one question well: is this price move backed by people arriving or by people leaving? That question is worth asking. Just do not ask it for more.