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Contract OI history

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Nov 20, 2026 EXPIRATION

COST $840.00 Put

COST261120P00840000

Latest saved OI1,083Oct 23, 2026
Last change-35vs 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. 1,4077030 2026-10-09: 1,407 OI2026-10-13: 1,393 OI2026-10-14: 1,393 OI2026-10-15: 1,351 OI2026-10-16: 1,305 OI2026-10-21: 1,118 OI2026-10-23: 1,083 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, 2026Viewing1,083-35
Oct 21, 20261,118-187
Oct 16, 20261,305-46
Oct 15, 20261,351-42
Oct 14, 20261,3930
Oct 13, 20261,393-14
Oct 09, 20261,407No prior observation