OITracker Cboe delayed data

Contract OI history

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Oct 30, 2026 EXPIRATION

BLK $1030.00 Put

BLK261030P01030000

Latest saved OI5Oct 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 $1030.00 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. 520 2026-10-02: 5 OI2026-10-05: 5 OI2026-10-06: 5 OI2026-10-07: 5 OI2026-10-08: 5 OI2026-10-09: 5 OI2026-10-13: 4 OI2026-10-14: 4 OI2026-10-15: 5 OI2026-10-16: 5 OI2026-10-21: 5 OI2026-10-23: 5 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, 2026Viewing50
Oct 21, 202650
Oct 16, 202650
Oct 15, 20265+1
Oct 14, 202640
Oct 13, 20264-1
Oct 09, 202650
Oct 08, 202650
Oct 07, 202650
Oct 06, 202650
Oct 05, 202650
Oct 02, 20265No prior observation