Bitcoin’s year-end options expiry has helped keep volatility unusually muted, even as macro conditions and risk assets more broadly have turned supportive for higher prices.
Throughout December, bitcoin has remained confined to a tight $85,000–$90,000 range, underperforming a rally in U.S. equities and gold’s surge to fresh record highs. While that stagnation has tested investor patience, the explanation lies less in waning demand and more in the mechanics of the derivatives market.
Those mechanics are now close to unwinding. Once the options roll off, market structure points to a higher-resolution outcome, with a move toward the mid-$90,000s appearing more likely than a sustained break below $85,000.
The range-bound trade has been driven by a dense concentration of options exposure around current spot levels. Options give traders the right, but not the obligation, to buy or sell bitcoin at a set price. Call options gain when prices rise, while put options benefit from declines. Dealers who write these contracts hedge dynamically in spot and futures markets, guided by delta and gamma.
Delta measures how much an option’s value changes for a $1 move in bitcoin, while gamma captures how quickly that sensitivity shifts as prices move. When gamma is elevated near spot, dealers are forced to trade frequently — buying on dips and selling into rallies — which dampens volatility.
According to analyst David on X, significant put gamma near $85,000 acted as a downside anchor through much of December, compelling dealers to buy bitcoin during pullbacks. At the same time, heavy call gamma around $90,000 limited upside moves, with dealers selling into strength. The result was a self-reinforcing range driven by hedging flows rather than strong directional conviction.
That stabilizing force is set to fade as roughly $27 billion in bitcoin options expire on Dec. 26. As expiry approaches, both gamma and delta decay, reducing the need for aggressive dealer hedging.
This expiry stands out for both its scale and its bullish skew. More than half of Deribit’s open interest is expected to roll off, with a put-call ratio of just 0.38 — indicating nearly three times as many calls as puts. Much of the open interest is concentrated in upside strikes between $100,000 and $116,000.
The so-called max pain level — where option buyers would incur the greatest losses and sellers would typically benefit — sits near $96,000, reinforcing the upside bias.
Implied volatility remains subdued as well. The Bitcoin Volmex implied volatility index is hovering near one-month lows around 45, suggesting traders are not pricing in elevated near-term risk and leaving the market vulnerable to a volatility pickup once the options-related pressure lifts.
