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Contract OI history

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Dec 18, 2026 EXPIRATION

CAH $220.00 Put

CAH261218P00220000

Latest saved OI86Oct 23, 2026
Last change+2vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CAH $220.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 90450 2026-10-02: 90 OI2026-10-05: 90 OI2026-10-06: 90 OI2026-10-07: 87 OI2026-10-08: 86 OI2026-10-09: 86 OI2026-10-13: 86 OI2026-10-14: 86 OI2026-10-15: 85 OI2026-10-16: 84 OI2026-10-21: 84 OI2026-10-23: 86 OI Oct 02, 2026Oct 23, 2026

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

CAH contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing86+2
Oct 21, 2026840
Oct 16, 202684-1
Oct 15, 202685-1
Oct 14, 2026860
Oct 13, 2026860
Oct 09, 2026860
Oct 08, 202686-1
Oct 07, 202687-3
Oct 06, 2026900
Oct 05, 2026900
Oct 02, 202690No prior observation