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Contract OI history

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Dec 18, 2026 EXPIRATION

BLK $900.00 Put

BLK261218P00900000

Latest saved OI111Oct 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 $900.00 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. 112560 2026-10-02: 103 OI2026-10-05: 110 OI2026-10-06: 110 OI2026-10-07: 110 OI2026-10-08: 111 OI2026-10-09: 111 OI2026-10-13: 112 OI2026-10-14: 112 OI2026-10-15: 112 OI2026-10-16: 112 OI2026-10-21: 110 OI2026-10-23: 111 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, 2026Viewing111+1
Oct 21, 2026110-2
Oct 16, 20261120
Oct 15, 20261120
Oct 14, 20261120
Oct 13, 2026112+1
Oct 09, 20261110
Oct 08, 2026111+1
Oct 07, 20261100
Oct 06, 20261100
Oct 05, 2026110+7
Oct 02, 2026103No prior observation