SPX Options Expiration Dates
SPX expiration logic has two different layers: the standard monthly SPX cycle and the short-dated SPXW series. This page separates the AM-settled monthly reference dates from the PM-settled weekly context that traders often search for.
Standard SPX monthly
Third Friday cycle
Standard monthly SPX options use the monthly cycle, adjusted earlier for market holidays.
SPXW series
PM-settled short dates
SPXW is used for weekly and end-of-month short-dated S&P 500 index expirations.
June 2026 monthly
Thursday, June 18, 2026
The standard June 2026 cycle moves because Friday, June 19 is Juneteenth.
Settlement caveat
Do not mix standard SPX and SPXW in one unlabelled dataset
SPX and SPXW can appear close together in option chains, but they should not be collapsed into a single undifferentiated expiration series. Standard monthly SPX options are generally AM-settled, while SPXW weekly and end-of-month options are generally PM-settled. A backtest or risk report that ignores this distinction can assign the wrong settlement reference to the contract and misread the final trading window.
The practical solution is simple: store the root, expiration date, settlement family, and source symbol separately. Use monthly tables for the standard cycle, use SPXW-specific logic for short-dated index expirations, and make the contract symbol itself available in logs so a disputed result can be traced back to the exact listed instrument.
2026 standard monthly SPX reference dates
These dates are the standard monthly anchors. SPXW weekly and end-of-month expirations can add more dates around this table.
2027 standard monthly SPX reference dates
June 2027 is holiday-adjusted because Juneteenth is observed on Friday, June 18, 2027.
API workflow
Fetch listed expirations, then decode the contract symbol
SPX workflows should confirm listed dates before requesting contracts. After selecting a date, keep the OCC ticker in the downstream record because the root and expiration together identify which settlement family and product convention the model is actually observing.
curl "https://api.cutemarkets.com/v1/tickers/expirations/SPX/" \
-H "Authorization: Bearer YOUR_API_KEY"
curl "https://api.cutemarkets.com/v1/options/contracts/?underlying_ticker=SPX&expiration_date=2026-06-18&limit=100" \
-H "Authorization: Bearer YOUR_API_KEY"Last verified
Date-sensitive calendar references on this page were checked on April 27, 2026. Calendar math is useful for planning, but listed contracts and exchange calendars should still be verified before production workflows run.
SPX expiration FAQ
What is the difference between SPX and SPXW options?
Standard monthly SPX options are generally AM-settled. SPXW is the PM-settled weekly and end-of-month S&P 500 index option series commonly used for short-dated index workflows.
When is standard monthly SPX expiration?
Standard monthly SPX expirations follow the third-Friday monthly cycle, adjusted earlier when the market is closed on that Friday.
Can SPXW expire on days other than Friday?
Yes. Cboe lists SPXW weekly expirations across multiple weekdays, subject to listing rules and holidays. Confirm the listed contract before trading or modeling.
Related pages
SPXW expiration dates
Review the short-dated PM-settled SPXW calendar and November 2025 examples.
OCC option symbol format
Decode SPX and SPXW contract symbols into expiration and strike fields.
Quarterly OpEx dates
See the quarterly index expiration anchors for 2026 and 2027.
Full expiration calendar
Use the interactive calendar for weekly, monthly, quarterly, and holiday-adjusted OpEx dates.
Next OpEx date
Get the immediate answer for the next standard monthly OpEx and nearby weekly cycles.
Expirations API docs
Fetch listed expiration dates for any underlying ticker with one endpoint.
Options data catalog
Browse contracts, chains, quotes, trades, bars, and reference endpoints.