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Contract OI history

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Apr 16, 2027 EXPIRATION

COSM $500.00 Put

COSM270416P00000500

Latest saved OI302Oct 23, 2026
Last change0vs 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. 3021510 2026-10-08: 103 OI2026-10-13: 302 OI2026-10-14: 302 OI2026-10-16: 302 OI2026-10-20: 302 OI2026-10-23: 302 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, 2026Viewing3020
Oct 20, 20263020
Oct 16, 20263020
Oct 14, 20263020
Oct 13, 2026302+199
Oct 08, 2026103No prior observation