OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

BX $135.00 Put

BX261218P00135000

Latest saved OI392Oct 23, 2026
Last change-2vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BX $135.00 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. 4062030 2026-10-02: 403 OI2026-10-05: 406 OI2026-10-06: 406 OI2026-10-07: 406 OI2026-10-08: 406 OI2026-10-09: 405 OI2026-10-13: 405 OI2026-10-14: 405 OI2026-10-15: 404 OI2026-10-16: 404 OI2026-10-21: 394 OI2026-10-23: 392 OI Oct 02, 2026Oct 23, 2026

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

BX contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing392-2
Oct 21, 2026394-10
Oct 16, 20264040
Oct 15, 2026404-1
Oct 14, 20264050
Oct 13, 20264050
Oct 09, 2026405-1
Oct 08, 20264060
Oct 07, 20264060
Oct 06, 20264060
Oct 05, 2026406+3
Oct 02, 2026403No prior observation