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Contract OI history

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Dec 18, 2026 EXPIRATION

BSP $40.00 Put

BSP261218P00040000

Latest saved OI1,360Oct 23, 2026
Last change+22vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
BSP $40.00 put open interest history 7 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 1,3606800 2026-10-08: 1 OI2026-10-13: 13 OI2026-10-14: 13 OI2026-10-15: 1,316 OI2026-10-16: 1,053 OI2026-10-21: 1,338 OI2026-10-23: 1,360 OI Oct 08, 2026Oct 23, 2026

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

BSP contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,360+22
Oct 21, 20261,338+285
Oct 16, 20261,053-263
Oct 15, 20261,316+1,303
Oct 14, 2026130
Oct 13, 202613+12
Oct 08, 20261No prior observation