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Contract OI history

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Jan 21, 2028 EXPIRATION

HCA $320.00 Put

HCA280121P00320000

Latest saved OI23Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
HCA $320.00 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. 23110 2026-10-02: 19 OI2026-10-05: 19 OI2026-10-06: 19 OI2026-10-07: 19 OI2026-10-08: 19 OI2026-10-09: 19 OI2026-10-13: 22 OI2026-10-14: 22 OI2026-10-15: 22 OI2026-10-16: 22 OI2026-10-21: 23 OI2026-10-23: 23 OI Oct 02, 2026Oct 23, 2026

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

HCA contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026230
Oct 21, 2026Viewing23+1
Oct 16, 2026220
Oct 15, 2026220
Oct 14, 2026220
Oct 13, 202622+3
Oct 09, 2026190
Oct 08, 2026190
Oct 07, 2026190
Oct 06, 2026190
Oct 05, 2026190
Oct 02, 202619No prior observation