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Contract OI history

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Dec 18, 2026 EXPIRATION

BAX $27.50 Call

BAX261218C00027500

Latest saved OI1,158Oct 23, 2026
Last change+11vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BAX $27.50 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. 1,1635810 2026-10-02: 185 OI2026-10-05: 1,136 OI2026-10-06: 1,139 OI2026-10-07: 1,139 OI2026-10-08: 1,139 OI2026-10-09: 1,139 OI2026-10-13: 1,143 OI2026-10-14: 1,147 OI2026-10-15: 1,149 OI2026-10-16: 1,163 OI2026-10-21: 1,147 OI2026-10-23: 1,158 OI Oct 02, 2026Oct 23, 2026

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

BAX contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,158+11
Oct 21, 20261,147-16
Oct 16, 20261,163+14
Oct 15, 20261,149+2
Oct 14, 20261,147+4
Oct 13, 20261,143+4
Oct 09, 20261,1390
Oct 08, 20261,1390
Oct 07, 20261,1390
Oct 06, 20261,139+3
Oct 05, 20261,136+951
Oct 02, 2026185No prior observation