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Contract OI history

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Dec 18, 2026 EXPIRATION

COO $55.00 Put

COO261218P00055000

Latest saved OI479Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COO $55.00 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. 4792390 2026-10-09: 478 OI2026-10-13: 478 OI2026-10-14: 478 OI2026-10-15: 478 OI2026-10-16: 478 OI2026-10-21: 479 OI2026-10-23: 479 OI Oct 09, 2026Oct 23, 2026

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

COO contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing4790
Oct 21, 2026479+1
Oct 16, 20264780
Oct 15, 20264780
Oct 14, 20264780
Oct 13, 20264780
Oct 09, 2026478No prior observation