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Contract OI history

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Jan 15, 2027 EXPIRATION

COST $945.00 Put

COST270115P00945000

Latest saved OI228Oct 23, 2026
Last change+36vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $945.00 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. 2281140 2026-10-09: 184 OI2026-10-13: 185 OI2026-10-14: 185 OI2026-10-15: 183 OI2026-10-16: 183 OI2026-10-21: 192 OI2026-10-23: 228 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, 2026Viewing228+36
Oct 21, 2026192+9
Oct 16, 20261830
Oct 15, 2026183-2
Oct 14, 20261850
Oct 13, 2026185+1
Oct 09, 2026184No prior observation