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Contract OI history

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Jan 15, 2027 EXPIRATION

BSX $55.00 Put

BSX270115P00055000

Latest saved OI1,831Oct 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. 1,8319150 2026-10-02: 1,827 OI2026-10-05: 1,827 OI2026-10-06: 1,827 OI2026-10-07: 1,827 OI2026-10-08: 1,827 OI2026-10-09: 1,829 OI2026-10-13: 1,829 OI2026-10-14: 1,829 OI2026-10-15: 1,829 OI2026-10-16: 1,829 OI2026-10-21: 1,831 OI2026-10-23: 1,831 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, 2026Viewing1,8310
Oct 21, 20261,831+2
Oct 16, 20261,8290
Oct 15, 20261,8290
Oct 14, 20261,8290
Oct 13, 20261,8290
Oct 09, 20261,829+2
Oct 08, 20261,8270
Oct 07, 20261,8270
Oct 06, 20261,8270
Oct 05, 20261,8270
Oct 02, 20261,827No prior observation