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Contract OI history

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Dec 18, 2026 EXPIRATION

BSX $35.00 Put

BSX261218P00035000

Latest saved OI3,105Oct 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
BSX $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. 3,1051,5520 2026-10-02: 2,243 OI2026-10-05: 2,284 OI2026-10-06: 2,289 OI2026-10-07: 2,273 OI2026-10-08: 2,273 OI2026-10-09: 2,324 OI2026-10-13: 2,451 OI2026-10-14: 2,451 OI2026-10-15: 2,470 OI2026-10-16: 2,840 OI2026-10-21: 3,103 OI2026-10-23: 3,105 OI Oct 02, 2026Oct 23, 2026

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

BSX contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing3,105+2
Oct 21, 20263,103+263
Oct 16, 20262,840+370
Oct 15, 20262,470+19
Oct 14, 20262,4510
Oct 13, 20262,451+127
Oct 09, 20262,324+51
Oct 08, 20262,2730
Oct 07, 20262,273-16
Oct 06, 20262,289+5
Oct 05, 20262,284+41
Oct 02, 20262,243No prior observation