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Contract OI history

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Mar 19, 2027 EXPIRATION

CAH $230.00 Put

CAH270319P00230000

Latest saved OI218Oct 23, 2026
Last change+1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CAH $230.00 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. 2181090 2026-10-02: 213 OI2026-10-05: 215 OI2026-10-06: 217 OI2026-10-07: 216 OI2026-10-08: 216 OI2026-10-09: 216 OI2026-10-13: 216 OI2026-10-14: 216 OI2026-10-15: 216 OI2026-10-16: 216 OI2026-10-21: 217 OI2026-10-23: 218 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, 2026Viewing218+1
Oct 21, 2026217+1
Oct 16, 20262160
Oct 15, 20262160
Oct 14, 20262160
Oct 13, 20262160
Oct 09, 20262160
Oct 08, 20262160
Oct 07, 2026216-1
Oct 06, 2026217+2
Oct 05, 2026215+2
Oct 02, 2026213No prior observation