OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

CE $40.00 Put

CE270115P00040000

Latest saved OI739Oct 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. 8394190 2026-10-02: 830 OI2026-10-05: 838 OI2026-10-06: 838 OI2026-10-07: 838 OI2026-10-08: 839 OI2026-10-09: 738 OI2026-10-13: 738 OI2026-10-14: 738 OI2026-10-16: 737 OI2026-10-20: 739 OI2026-10-23: 739 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, 2026Viewing7390
Oct 20, 2026739+2
Oct 16, 2026737-1
Oct 14, 20267380
Oct 13, 20267380
Oct 09, 2026738-101
Oct 08, 2026839+1
Oct 07, 20268380
Oct 06, 20268380
Oct 05, 2026838+8
Oct 02, 2026830No prior observation