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Contract OI history

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Oct 30, 2026 EXPIRATION

COST $735.00 Put

COST261030P00735000

Latest saved OI274Oct 23, 2026
Last change+6vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $735.00 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. 2741370 2026-10-09: 185 OI2026-10-13: 185 OI2026-10-14: 185 OI2026-10-15: 188 OI2026-10-16: 188 OI2026-10-21: 268 OI2026-10-23: 274 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, 2026Viewing274+6
Oct 21, 2026268+80
Oct 16, 20261880
Oct 15, 2026188+3
Oct 14, 20261850
Oct 13, 20261850
Oct 09, 2026185No prior observation