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Contract OI history

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Nov 20, 2026 EXPIRATION

BLK $1040.00 Put

BLK261120P01040000

Latest saved OI61Oct 23, 2026
Last change+1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BLK $1040.00 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. 61300 2026-10-02: 9 OI2026-10-05: 9 OI2026-10-06: 9 OI2026-10-07: 10 OI2026-10-08: 11 OI2026-10-09: 11 OI2026-10-13: 12 OI2026-10-14: 12 OI2026-10-15: 48 OI2026-10-16: 47 OI2026-10-21: 60 OI2026-10-23: 61 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, 2026Viewing61+1
Oct 21, 202660+13
Oct 16, 202647-1
Oct 15, 202648+36
Oct 14, 2026120
Oct 13, 202612+1
Oct 09, 2026110
Oct 08, 202611+1
Oct 07, 202610+1
Oct 06, 202690
Oct 05, 202690
Oct 02, 20269No prior observation