OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

B $38.00 Call

B261218C00038000

Latest saved OI251Oct 23, 2026
Last change+41vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $38.00 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. 2511250 2026-10-02: 197 OI2026-10-05: 199 OI2026-10-06: 199 OI2026-10-07: 198 OI2026-10-08: 198 OI2026-10-09: 202 OI2026-10-13: 206 OI2026-10-14: 206 OI2026-10-15: 209 OI2026-10-16: 209 OI2026-10-21: 210 OI2026-10-23: 251 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, 2026Viewing251+41
Oct 21, 2026210+1
Oct 16, 20262090
Oct 15, 2026209+3
Oct 14, 20262060
Oct 13, 2026206+4
Oct 09, 2026202+4
Oct 08, 20261980
Oct 07, 2026198-1
Oct 06, 20261990
Oct 05, 2026199+2
Oct 02, 2026197No prior observation