SPY Options Expiration Dates 2026

SPY is liquid enough that weekly expiration workflows are common, but a robust implementation should still begin with listed dates. The calendar tells you whether January 9, April 17, or May 15 belongs to a weekly, monthly, or quarterly cycle. The API tells you which SPY contracts are actually listed for that date, which strikes exist, and which OCC tickers should be used in downstream quote, trade, or aggregate requests.

This distinction is especially important for backtests. If a model assumes a date exists and later joins bars, quotes, or snapshots to that assumption, it can create silent survivorship or empty-chain errors. A cleaner implementation fetches expirations, tags each date, requests contracts for the selected date, and stores the full contract ticker with every measurement.