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Contract OI history

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Dec 18, 2026 EXPIRATION

BSP $50.00 Put

BSP261218P00050000

Latest saved OI3,567Oct 23, 2026
Last change+1vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
BSP $50.00 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. 3,5671,7830 2026-10-08: 0 OI2026-10-13: 0 OI2026-10-14: 0 OI2026-10-15: 2,711 OI2026-10-16: 2,713 OI2026-10-21: 3,566 OI2026-10-23: 3,567 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, 2026Viewing3,567+1
Oct 21, 20263,566+853
Oct 16, 20262,713+2
Oct 15, 20262,711+2,711
Oct 14, 202600
Oct 13, 202600
Oct 08, 20260No prior observation