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Contract OI history

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Apr 16, 2027 EXPIRATION

COST $720.00 Put

COST270416P00720000

Latest saved OI248Oct 23, 2026
Last change-10vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $720.00 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. 2581290 2026-10-09: 248 OI2026-10-13: 248 OI2026-10-14: 248 OI2026-10-15: 248 OI2026-10-16: 258 OI2026-10-21: 258 OI2026-10-23: 248 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, 2026Viewing248-10
Oct 21, 20262580
Oct 16, 2026258+10
Oct 15, 20262480
Oct 14, 20262480
Oct 13, 20262480
Oct 09, 2026248No prior observation