OITracker Cboe delayed data

Contract OI history

Back to O

Jan 21, 2028 EXPIRATION

O $37.50 Put

O280121P00037500

Latest saved OI241Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
O $37.50 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 2621310 2026-10-02: 262 OI2026-10-05: 262 OI2026-10-06: 247 OI2026-10-07: 247 OI2026-10-08: 247 OI2026-10-09: 247 OI2026-10-13: 247 OI2026-10-14: 247 OI2026-10-15: 241 OI2026-10-16: 241 OI2026-10-21: 241 OI2026-10-23: 241 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

O contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing2410
Oct 21, 20262410
Oct 16, 20262410
Oct 15, 2026241-6
Oct 14, 20262470
Oct 13, 20262470
Oct 09, 20262470
Oct 08, 20262470
Oct 07, 20262470
Oct 06, 2026247-15
Oct 05, 20262620
Oct 02, 2026262No prior observation