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Contract OI history

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Oct 23, 2026 EXPIRATION

COST $860.00 Put

COST261023P00860000

Latest saved OI341Oct 23, 2026
Last change+14vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $860.00 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. 3411700 2026-10-09: 331 OI2026-10-13: 338 OI2026-10-14: 338 OI2026-10-15: 333 OI2026-10-16: 332 OI2026-10-21: 327 OI2026-10-23: 341 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, 2026Viewing341+14
Oct 21, 2026327-5
Oct 16, 2026332-1
Oct 15, 2026333-5
Oct 14, 20263380
Oct 13, 2026338+7
Oct 09, 2026331No prior observation