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Contract OI history

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Sep 17, 2027 EXPIRATION

BSX $40.00 Put

BSX270917P00040000

Latest saved OI3,248Oct 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 $40.00 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. 3,2481,6240 2026-10-02: 2,433 OI2026-10-05: 2,534 OI2026-10-06: 2,554 OI2026-10-07: 2,554 OI2026-10-08: 2,554 OI2026-10-09: 3,225 OI2026-10-13: 3,227 OI2026-10-14: 3,227 OI2026-10-15: 3,227 OI2026-10-16: 3,232 OI2026-10-21: 3,246 OI2026-10-23: 3,248 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, 2026Viewing3,248+2
Oct 21, 20263,246+14
Oct 16, 20263,232+5
Oct 15, 20263,2270
Oct 14, 20263,2270
Oct 13, 20263,227+2
Oct 09, 20263,225+671
Oct 08, 20262,5540
Oct 07, 20262,5540
Oct 06, 20262,554+20
Oct 05, 20262,534+101
Oct 02, 20262,433No prior observation