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Contract OI history

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Dec 18, 2026 EXPIRATION

COST $860.00 Put

COST261218P00860000

Latest saved OI613Oct 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 $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. 7303650 2026-10-09: 718 OI2026-10-13: 730 OI2026-10-14: 730 OI2026-10-15: 698 OI2026-10-16: 655 OI2026-10-21: 618 OI2026-10-23: 613 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, 2026Viewing613-5
Oct 21, 2026618-37
Oct 16, 2026655-43
Oct 15, 2026698-32
Oct 14, 20267300
Oct 13, 2026730+12
Oct 09, 2026718No prior observation