OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

BLK $1100.00 Put

BLK270115P01100000

Latest saved OI460Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BLK $1100.00 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. 4602300 2026-10-02: 423 OI2026-10-05: 433 OI2026-10-06: 433 OI2026-10-07: 433 OI2026-10-08: 433 OI2026-10-09: 433 OI2026-10-13: 444 OI2026-10-14: 444 OI2026-10-15: 454 OI2026-10-16: 454 OI2026-10-21: 460 OI2026-10-23: 460 OI Oct 02, 2026Oct 23, 2026

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

BLK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing4600
Oct 21, 2026460+6
Oct 16, 20264540
Oct 15, 2026454+10
Oct 14, 20264440
Oct 13, 2026444+11
Oct 09, 20264330
Oct 08, 20264330
Oct 07, 20264330
Oct 06, 20264330
Oct 05, 2026433+10
Oct 02, 2026423No prior observation