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Contract OI history

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Nov 13, 2026 EXPIRATION

BLK $1000.00 Put

BLK261113P01000000

Latest saved OI74Oct 23, 2026
Last change+16vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BLK $1000.00 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. 74370 2026-10-02: 0 OI2026-10-05: 3 OI2026-10-06: 3 OI2026-10-07: 3 OI2026-10-08: 13 OI2026-10-09: 15 OI2026-10-13: 15 OI2026-10-14: 15 OI2026-10-15: 15 OI2026-10-16: 18 OI2026-10-21: 58 OI2026-10-23: 74 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, 2026Viewing74+16
Oct 21, 202658+40
Oct 16, 202618+3
Oct 15, 2026150
Oct 14, 2026150
Oct 13, 2026150
Oct 09, 202615+2
Oct 08, 202613+10
Oct 07, 202630
Oct 06, 202630
Oct 05, 20263+3
Oct 02, 20260No prior observation