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Contract OI history

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Dec 18, 2026 EXPIRATION

BCS $27.00 Put

BCS261218P00027000

Latest saved OI31Oct 23, 2026
Last change-1,277vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BCS $27.00 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. 1,3086540 2026-10-02: 1,307 OI2026-10-05: 1,307 OI2026-10-06: 1,307 OI2026-10-07: 1,307 OI2026-10-08: 1,308 OI2026-10-09: 1,308 OI2026-10-13: 1,308 OI2026-10-14: 1,308 OI2026-10-15: 1,308 OI2026-10-16: 1,308 OI2026-10-21: 1,308 OI2026-10-23: 31 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

BCS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing31-1,277
Oct 21, 20261,3080
Oct 16, 20261,3080
Oct 15, 20261,3080
Oct 14, 20261,3080
Oct 13, 20261,3080
Oct 09, 20261,3080
Oct 08, 20261,308+1
Oct 07, 20261,3070
Oct 06, 20261,3070
Oct 05, 20261,3070
Oct 02, 20261,307No prior observation