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Contract OI history

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Jan 15, 2027 EXPIRATION

COSM $500.00 Put

COSM270115P00000500

Latest saved OI90Oct 23, 2026
Last change-8vs previous saved observation
Saved market days6Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
COSM $500.00 put open interest history 6 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 98490 2026-10-08: 98 OI2026-10-13: 98 OI2026-10-14: 98 OI2026-10-16: 98 OI2026-10-20: 98 OI2026-10-23: 90 OI Oct 08, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

COSM contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing90-8
Oct 20, 2026980
Oct 16, 2026980
Oct 14, 2026980
Oct 13, 2026980
Oct 08, 202698No prior observation