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Contract OI history

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Nov 06, 2026 EXPIRATION

COST $800.00 Put

COST261106P00800000

Latest saved OI321Oct 23, 2026
Last change+5vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $800.00 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. 3211600 2026-10-09: 313 OI2026-10-13: 315 OI2026-10-14: 315 OI2026-10-15: 315 OI2026-10-16: 315 OI2026-10-21: 316 OI2026-10-23: 321 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, 2026Viewing321+5
Oct 21, 2026316+1
Oct 16, 20263150
Oct 15, 20263150
Oct 14, 20263150
Oct 13, 2026315+2
Oct 09, 2026313No prior observation