OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

M $21.00 Put

M261218P00021000

Latest saved OI599Oct 23, 2026
Last change0vs 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. 6463230 2026-10-02: 524 OI2026-10-05: 524 OI2026-10-06: 582 OI2026-10-07: 606 OI2026-10-08: 606 OI2026-10-09: 604 OI2026-10-13: 597 OI2026-10-14: 597 OI2026-10-15: 598 OI2026-10-16: 646 OI2026-10-21: 599 OI2026-10-23: 599 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, 2026Viewing5990
Oct 21, 2026599-47
Oct 16, 2026646+48
Oct 15, 2026598+1
Oct 14, 20265970
Oct 13, 2026597-7
Oct 09, 2026604-2
Oct 08, 20266060
Oct 07, 2026606+24
Oct 06, 2026582+58
Oct 05, 20265240
Oct 02, 2026524No prior observation