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Contract OI history

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Jan 15, 2027 EXPIRATION

COST $860.00 Put

COST270115P00860000

Latest saved OI900Oct 23, 2026
Last change+2vs 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. 9184590 2026-10-09: 918 OI2026-10-13: 905 OI2026-10-14: 905 OI2026-10-15: 898 OI2026-10-16: 898 OI2026-10-21: 898 OI2026-10-23: 900 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, 2026Viewing900+2
Oct 21, 20268980
Oct 16, 20268980
Oct 15, 2026898-7
Oct 14, 20269050
Oct 13, 2026905-13
Oct 09, 2026918No prior observation