Bitcoin and Ethereum options worth nearly $16.6 billion have built up for the 2026 third-quarter expiry, with call open interest exceeding puts across both markets.

According to Coinbase Markets, Bitcoin accounts for roughly $14.73 billion of the notional value, compared with approximately $1.92 billion for Ethereum. Its Sept. 15 market update showed 186,000 $BTC contracts and 756,100 $ETH contracts in open interest.

For quarterly contracts on Deribit, September options expire on the final Friday of the quarter at 08:00 UTC. The exchange’s official expiry policy places the 2026 Q3 settlement on Friday, Sept. 25.