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Contract OI history

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Nov 20, 2026 EXPIRATION

COST $855.00 Put

COST261120P00855000

Latest saved OI156Oct 23, 2026
Last change-6vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $855.00 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. 197980 2026-10-09: 196 OI2026-10-13: 197 OI2026-10-14: 197 OI2026-10-15: 195 OI2026-10-16: 167 OI2026-10-21: 162 OI2026-10-23: 156 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, 2026Viewing156-6
Oct 21, 2026162-5
Oct 16, 2026167-28
Oct 15, 2026195-2
Oct 14, 20261970
Oct 13, 2026197+1
Oct 09, 2026196No prior observation