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Contract OI history

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Feb 19, 2027 EXPIRATION

BSX $35.00 Put

BSX270219P00035000

Latest saved OI1,198Oct 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 $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. 1,1985990 2026-10-02: 990 OI2026-10-05: 1,000 OI2026-10-06: 1,003 OI2026-10-07: 1,003 OI2026-10-08: 1,003 OI2026-10-09: 1,007 OI2026-10-13: 1,025 OI2026-10-14: 1,025 OI2026-10-15: 1,030 OI2026-10-16: 1,030 OI2026-10-21: 1,198 OI2026-10-23: 1,198 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, 2026Viewing1,1980
Oct 21, 20261,198+168
Oct 16, 20261,0300
Oct 15, 20261,030+5
Oct 14, 20261,0250
Oct 13, 20261,025+18
Oct 09, 20261,007+4
Oct 08, 20261,0030
Oct 07, 20261,0030
Oct 06, 20261,003+3
Oct 05, 20261,000+10
Oct 02, 2026990No prior observation