OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

B $41.00 Call

B261218C00041000

Latest saved OI709Oct 23, 2026
Last change+7vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $41.00 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. 7093540 2026-10-02: 140 OI2026-10-05: 140 OI2026-10-06: 140 OI2026-10-07: 144 OI2026-10-08: 143 OI2026-10-09: 143 OI2026-10-13: 146 OI2026-10-14: 147 OI2026-10-15: 331 OI2026-10-16: 332 OI2026-10-21: 702 OI2026-10-23: 709 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, 2026Viewing709+7
Oct 21, 2026702+370
Oct 16, 2026332+1
Oct 15, 2026331+184
Oct 14, 2026147+1
Oct 13, 2026146+3
Oct 09, 20261430
Oct 08, 2026143-1
Oct 07, 2026144+4
Oct 06, 20261400
Oct 05, 20261400
Oct 02, 2026140No prior observation