OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

BSX $30.00 Put

BSX280121P00030000

Latest saved OI4,541Oct 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 $30.00 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. 4,5412,2700 2026-10-02: 4,509 OI2026-10-05: 4,510 OI2026-10-06: 4,540 OI2026-10-07: 4,540 OI2026-10-08: 4,540 OI2026-10-09: 4,540 OI2026-10-13: 4,541 OI2026-10-14: 4,541 OI2026-10-15: 4,541 OI2026-10-16: 4,541 OI2026-10-21: 4,541 OI2026-10-23: 4,541 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, 2026Viewing4,5410
Oct 21, 20264,5410
Oct 16, 20264,5410
Oct 15, 20264,5410
Oct 14, 20264,5410
Oct 13, 20264,541+1
Oct 09, 20264,5400
Oct 08, 20264,5400
Oct 07, 20264,5400
Oct 06, 20264,540+30
Oct 05, 20264,510+1
Oct 02, 20264,509No prior observation