OITracker Cboe delayed data

Contract OI history

Back to BLK

Jan 15, 2027 EXPIRATION

BLK $1100.00 Call

BLK270115C01100000

Latest saved OI430Oct 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 $1100.00 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 4322160 2026-10-02: 429 OI2026-10-05: 430 OI2026-10-06: 430 OI2026-10-07: 430 OI2026-10-08: 430 OI2026-10-09: 428 OI2026-10-13: 432 OI2026-10-14: 432 OI2026-10-15: 432 OI2026-10-16: 431 OI2026-10-21: 431 OI2026-10-23: 430 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, 2026Viewing430-1
Oct 21, 20264310
Oct 16, 2026431-1
Oct 15, 20264320
Oct 14, 20264320
Oct 13, 2026432+4
Oct 09, 2026428-2
Oct 08, 20264300
Oct 07, 20264300
Oct 06, 20264300
Oct 05, 2026430+1
Oct 02, 2026429No prior observation