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Contract OI history

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Dec 18, 2026 EXPIRATION

BSX $55.00 Put

BSX261218P00055000

Latest saved OI1,571Oct 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 $55.00 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. 1,5757870 2026-10-02: 1,565 OI2026-10-05: 1,575 OI2026-10-06: 1,572 OI2026-10-07: 1,572 OI2026-10-08: 1,572 OI2026-10-09: 1,572 OI2026-10-13: 1,574 OI2026-10-14: 1,574 OI2026-10-15: 1,574 OI2026-10-16: 1,574 OI2026-10-21: 1,571 OI2026-10-23: 1,571 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, 2026Viewing1,5710
Oct 21, 20261,571-3
Oct 16, 20261,5740
Oct 15, 20261,5740
Oct 14, 20261,5740
Oct 13, 20261,574+2
Oct 09, 20261,5720
Oct 08, 20261,5720
Oct 07, 20261,5720
Oct 06, 20261,572-3
Oct 05, 20261,575+10
Oct 02, 20261,565No prior observation