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Contract OI history

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Oct 23, 2026 EXPIRATION

COST $840.00 Put

COST261023P00840000

Latest saved OI617Oct 23, 2026
Last change+3vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $840.00 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. 6173080 2026-10-09: 69 OI2026-10-13: 73 OI2026-10-14: 73 OI2026-10-15: 74 OI2026-10-16: 177 OI2026-10-21: 614 OI2026-10-23: 617 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, 2026Viewing617+3
Oct 21, 2026614+437
Oct 16, 2026177+103
Oct 15, 202674+1
Oct 14, 2026730
Oct 13, 202673+4
Oct 09, 202669No prior observation