OITracker Cboe delayed data

Contract OI history

Back to BSX

Dec 18, 2026 EXPIRATION

BSX $50.00 Call

BSX261218C00050000

Latest saved OI25,370Oct 23, 2026
Last change-72vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $50.00 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 25,44212,7210 2026-10-02: 24,857 OI2026-10-05: 24,850 OI2026-10-06: 24,850 OI2026-10-07: 24,853 OI2026-10-08: 24,853 OI2026-10-09: 24,875 OI2026-10-13: 25,350 OI2026-10-14: 25,350 OI2026-10-15: 25,351 OI2026-10-16: 25,373 OI2026-10-21: 25,442 OI2026-10-23: 25,370 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, 2026Viewing25,370-72
Oct 21, 202625,442+69
Oct 16, 202625,373+22
Oct 15, 202625,351+1
Oct 14, 202625,3500
Oct 13, 202625,350+475
Oct 09, 202624,875+22
Oct 08, 202624,8530
Oct 07, 202624,853+3
Oct 06, 202624,8500
Oct 05, 202624,850-7
Oct 02, 202624,857No prior observation