OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

BLK $990.00 Put

BLK270115P00990000

Latest saved OI99Oct 23, 2026
Last change-15vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BLK $990.00 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. 114570 2026-10-02: 114 OI2026-10-05: 114 OI2026-10-06: 114 OI2026-10-07: 114 OI2026-10-08: 114 OI2026-10-09: 114 OI2026-10-13: 114 OI2026-10-14: 114 OI2026-10-15: 114 OI2026-10-16: 114 OI2026-10-21: 114 OI2026-10-23: 99 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, 2026Viewing99-15
Oct 21, 20261140
Oct 16, 20261140
Oct 15, 20261140
Oct 14, 20261140
Oct 13, 20261140
Oct 09, 20261140
Oct 08, 20261140
Oct 07, 20261140
Oct 06, 20261140
Oct 05, 20261140
Oct 02, 2026114No prior observation