OITracker Cboe delayed data

Contract OI history

Back to BLK

Nov 20, 2026 EXPIRATION

BLK $880.00 Put

BLK261120P00880000

Latest saved OI11Oct 23, 2026
Last change-10vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BLK $880.00 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. 176880 2026-10-02: 18 OI2026-10-05: 18 OI2026-10-06: 18 OI2026-10-07: 20 OI2026-10-08: 20 OI2026-10-09: 20 OI2026-10-13: 176 OI2026-10-14: 176 OI2026-10-15: 20 OI2026-10-16: 21 OI2026-10-21: 21 OI2026-10-23: 11 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, 2026Viewing11-10
Oct 21, 2026210
Oct 16, 202621+1
Oct 15, 202620-156
Oct 14, 20261760
Oct 13, 2026176+156
Oct 09, 2026200
Oct 08, 2026200
Oct 07, 202620+2
Oct 06, 2026180
Oct 05, 2026180
Oct 02, 202618No prior observation