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Contract OI history

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Oct 23, 2026 EXPIRATION

COST $900.00 Put

COST261023P00900000

Latest saved OI266Oct 23, 2026
Last change-16vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $900.00 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. 2891440 2026-10-09: 149 OI2026-10-13: 259 OI2026-10-14: 259 OI2026-10-15: 289 OI2026-10-16: 245 OI2026-10-21: 282 OI2026-10-23: 266 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, 2026Viewing266-16
Oct 21, 2026282+37
Oct 16, 2026245-44
Oct 15, 2026289+30
Oct 14, 20262590
Oct 13, 2026259+110
Oct 09, 2026149No prior observation