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Contract OI history

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Nov 20, 2026 EXPIRATION

BSP $40.00 Put

BSP261120P00040000

Latest saved OI1,672Oct 23, 2026
Last change+174vs 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. 1,6728360 2026-10-08: 387 OI2026-10-13: 425 OI2026-10-14: 425 OI2026-10-15: 664 OI2026-10-16: 681 OI2026-10-21: 1,498 OI2026-10-23: 1,672 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, 2026Viewing1,672+174
Oct 21, 20261,498+817
Oct 16, 2026681+17
Oct 15, 2026664+239
Oct 14, 20264250
Oct 13, 2026425+38
Oct 08, 2026387No prior observation