OITracker Cboe delayed data

Contract OI history

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Jun 17, 2027 EXPIRATION

B $35.00 Put

B270617P00035000

Latest saved OI5,526Oct 23, 2026
Last change+2vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $35.00 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. 5,5262,7630 2026-10-02: 5,230 OI2026-10-05: 5,487 OI2026-10-06: 5,487 OI2026-10-07: 5,487 OI2026-10-08: 5,488 OI2026-10-09: 5,488 OI2026-10-13: 5,512 OI2026-10-14: 5,514 OI2026-10-15: 5,525 OI2026-10-16: 5,525 OI2026-10-21: 5,524 OI2026-10-23: 5,526 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

B contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing5,526+2
Oct 21, 20265,524-1
Oct 16, 20265,5250
Oct 15, 20265,525+11
Oct 14, 20265,514+2
Oct 13, 20265,512+24
Oct 09, 20265,4880
Oct 08, 20265,488+1
Oct 07, 20265,4870
Oct 06, 20265,4870
Oct 05, 20265,487+257
Oct 02, 20265,230No prior observation