OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

CE $40.00 Put

CE280121P00040000

Latest saved OI2,168Oct 23, 2026
Last change0vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CE $40.00 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 2,1701,0850 2026-10-02: 2,169 OI2026-10-05: 2,169 OI2026-10-06: 2,169 OI2026-10-07: 2,169 OI2026-10-08: 2,169 OI2026-10-09: 2,170 OI2026-10-13: 2,170 OI2026-10-14: 2,170 OI2026-10-16: 2,169 OI2026-10-20: 2,168 OI2026-10-23: 2,168 OI Oct 02, 2026Oct 23, 2026

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

CE contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing2,1680
Oct 20, 20262,168-1
Oct 16, 20262,169-1
Oct 14, 20262,1700
Oct 13, 20262,1700
Oct 09, 20262,170+1
Oct 08, 20262,1690
Oct 07, 20262,1690
Oct 06, 20262,1690
Oct 05, 20262,1690
Oct 02, 20262,169No prior observation