$XSP Open Interest
S&P 500 MINI SPX OPTIONS INDEX ($XSP) had 985.0K open option contracts as of Nov 6, 2026: 293.48K calls and 691.51K puts. Open interest rose 15.7% over the past four weeks, and is $XSP's highest level in 12 weeks. The put/call open interest ratio is 2.36, so puts outnumber calls.
Open Interest by Strike
Showing results for $XSP, 2026-11-09(w), calls & puts
Open Interest Stats
Showing results for $XSP, 2026-11-09(w), calls & puts
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| Put Open Interest Total | |
| Open Interest Total | |
| Put-Call Open Interest Ratio |
Highest Open Interest Options
Showing results for $XSP, 2026-11-09(w), calls & puts
Open Interest Total by Expiry
Showing results for $XSP, 2026-11-09(w), calls & puts. View all expiries
Open Interest History
Showing daily totals for $XSP, all expirations, calls & puts. View full history
$XSP Open Interest FAQ
What is open interest?
Open interest is the number of option contracts that are open and not yet closed, exercised, or expired. The Options Clearing Corporation calculates it once a day from the previous day's trades, and it is published before the market opens.
How much open interest does $XSP have?
$XSP had 985.0K open option contracts as of Nov 6, 2026. Over the past 30 days, open interest averaged 899.75K contracts.
Is $XSP open interest rising or falling?
Open interest rose 15.7% over the past four weeks, and is $XSP's highest level in 12 weeks. It was 851.22K contracts on Oct 9, 2026. See the $XSP open interest history for a longer view.
What is the $XSP put/call open interest ratio?
The $XSP put/call open interest ratio was 2.36 as of Nov 6, 2026. Four weeks earlier it was 2.25.