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Contract OI history

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Dec 18, 2026 EXPIRATION

BSX $47.50 Put

BSX261218P00047500

Latest saved OI1,472Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $47.50 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. 1,4747370 2026-10-02: 1,474 OI2026-10-05: 1,474 OI2026-10-06: 1,474 OI2026-10-07: 1,474 OI2026-10-08: 1,474 OI2026-10-09: 1,474 OI2026-10-13: 1,470 OI2026-10-14: 1,470 OI2026-10-15: 1,470 OI2026-10-16: 1,470 OI2026-10-21: 1,472 OI2026-10-23: 1,472 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, 2026Viewing1,4720
Oct 21, 20261,472+2
Oct 16, 20261,4700
Oct 15, 20261,4700
Oct 14, 20261,4700
Oct 13, 20261,470-4
Oct 09, 20261,4740
Oct 08, 20261,4740
Oct 07, 20261,4740
Oct 06, 20261,4740
Oct 05, 20261,4740
Oct 02, 20261,474No prior observation