Meta description: Discover how BTC and ETH price swings are shaped by options expiry, using put-call ratios, max pain, and risk management strategies.
Options expiry is a recurring, underappreciated driver of Bitcoin (BTC) and Ether (ETH) volatility. When large volumes of derivative contracts near their expiry dates, ripples run through the crypto markets and prices can move sharply.
What are options expiries?
Options are contracts that give the holder the right, but not the obligation, to buy or sell BTC or ETH at a set price before the contract expires. As expiry approaches, the pricing of these options moves in tandem with market expectations. In crypto markets, expiries can occur across multiple timeframes, but many contracts expire on the last Friday of each month around 08:00 UTC. There are two main types: call options, which give the right to buy, and put options, which give the right to sell. The balance between calls and puts serves as a sentiment gauge for where traders expect prices to head, and it can influence near‑term moves when positions are rolled or hedged.
How expiry affects prices and volatility
When a large batch of options reaches expiry on the same date, even if only a fraction are exercised, the resulting hedging and position adjustments can amplify moves in the spot market for BTC and ETH. Traders reposition quickly, boosting volume and volatility within a narrow window. Historical patterns show that seasons of heavy expiry activity often correlate with spikes in volatility indices, as markets price in the new risk set around the expiry.
Sentiment indicators: put-call ratios and max pain
Put-call ratios provide a snapshot of market psychology. A ratio above 1 signals more bearish bets, while a ratio below 1 signals more bullish expectations. Max pain theory adds another lens: it identifies the price at which the largest number of options would expire worthless, potentially exerting influence as expiry nears. Large players may steer prices toward this level in the run‑up to expiry, creating short‑term pull and resistance zones.
Evidence and expectations
In June 2021, a notable expiry event coincided with a surge in the BTC volatility index after about $4 billion in BTC and ETH options were set to expire, with volatility jumping on June 14. More recently, the market has observed heavy expiry activity on major platforms; in August 2025, Deribit processed over $14.6 billion in BTC and ETH options expiry contracts, marking a record monthly total for digital assets in 2025.
Practical steps for traders
• Track key expiry metrics: open interest, put-call ratios, and max pain to identify potential volatility and directional bias.
• Hedge wisely: use options to protect spot exposure during high‑volatility expiry periods.
• Diversify: spread risk across assets and timeframes to reduce single‑event exposure.
• Leverage calendars and data tools: platforms like CoinGlass and CME Group calendars provide expiry insights and real‑time data to inform decisions.
Note: This article does not constitute investment advice. Readers should conduct their own research before trading or investing.