Every last Friday of the month, bitcoin options worth billions of dollars expire on venues like Deribit and CME. The event doesn't just settle contracts – it reshuffles dealer hedges, reprices implied volatility and can create sharp, short-lived moves in spot price. For traders who understand the mechanics, expiry is a recurring pattern worth planning for.
What gamma hedging does to spot price
Market makers who sell options hedge their delta exposure by buying or selling bitcoin futures (or the spot asset itself). As an option nears expiry, gamma – the rate of change of delta – spikes. That forces dealers to adjust hedges more aggressively on small price moves. The result can be 'sticky' price zones near strikes where open interest is concentrated. Once the options expire, those hedges unwind, sometimes leaving a price 'air pocket' in their wake.
Why max pain gets overhyped
Max pain is the strike price where option holders theoretically lose the most at settlement. It's frequently cited as a magnet for the spot price. But max pain is a static heuristic, not a predictive model. It ignores dealer gamma exposure, actual hedging flows and the fact that many positions are rolled or closed before expiry. What matters more is the real-time distribution of open interest by strike – that's where hedging pressure actually builds.
Reading the signals before expiry
Experienced traders look at several data points ahead of expiry: open interest clusters by strike, options skew (the difference in implied volatility between puts and calls), the implied volatility term structure, and estimated dealer gamma exposure. A skewed put/call ratio or a sudden jump in short-dated volatility can signal where dealers are leaning. On crypto-native venues like Deribit, where most retail and professional flow lives, these signals tend to be sharper than on the CME, which attracts more macro-hedging institutions.
A step-by-step approach for expiry week
A disciplined playbook starts with marking the calendar – know the exact settlement time. Then map the open interest strip to identify large strikes. Check implied volatility levels across the term structure – a steep contango or backwardation can hint at positioning. Estimate dealer gamma exposure using public data or third-party analytics. Watch the perpetual futures basis and funding rate: when basis spikes near expiry, arbitrageurs may be adding pressure. Finally, plan a few scenarios for price pinning and post-expiry drift, and size positions conservatively. The biggest risk isn't the move itself – it's being wrong-footed when liquidity thins around a large strike.
For traders, the key is to treat expiry as a known risk event rather than a tradeable signal. The mechanics are repeatable; the outcomes aren't.
