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Contract OI history

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Oct 30, 2026 EXPIRATION

COST $952.50 Put

COST261030P00952500

Latest saved OI293Oct 23, 2026
Last change+190vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $952.50 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 2931460 2026-10-09: 0 OI2026-10-13: 78 OI2026-10-14: 78 OI2026-10-15: 79 OI2026-10-16: 80 OI2026-10-21: 103 OI2026-10-23: 293 OI Oct 09, 2026Oct 23, 2026

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

COST contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing293+190
Oct 21, 2026103+23
Oct 16, 202680+1
Oct 15, 202679+1
Oct 14, 2026780
Oct 13, 202678+78
Oct 09, 20260No prior observation