OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

M $21.00 Put

M270115P00021000

Latest saved OI349Oct 23, 2026
Last change+11vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
M $21.00 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. 3491740 2026-10-02: 308 OI2026-10-05: 308 OI2026-10-06: 306 OI2026-10-07: 306 OI2026-10-08: 306 OI2026-10-09: 311 OI2026-10-13: 312 OI2026-10-14: 312 OI2026-10-15: 313 OI2026-10-16: 334 OI2026-10-21: 338 OI2026-10-23: 349 OI Oct 02, 2026Oct 23, 2026

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

M contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing349+11
Oct 21, 2026338+4
Oct 16, 2026334+21
Oct 15, 2026313+1
Oct 14, 20263120
Oct 13, 2026312+1
Oct 09, 2026311+5
Oct 08, 20263060
Oct 07, 20263060
Oct 06, 2026306-2
Oct 05, 20263080
Oct 02, 2026308No prior observation