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Contract OI history

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Jan 15, 2027 EXPIRATION

HCA $420.00 Put

HCA270115P00420000

Latest saved OI154Oct 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
HCA $420.00 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. 155770 2026-10-02: 144 OI2026-10-05: 144 OI2026-10-06: 146 OI2026-10-07: 148 OI2026-10-08: 154 OI2026-10-09: 155 OI2026-10-13: 146 OI2026-10-14: 150 OI2026-10-15: 150 OI2026-10-16: 150 OI2026-10-21: 152 OI2026-10-23: 154 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, 2026154+2
Oct 21, 2026Viewing152+2
Oct 16, 20261500
Oct 15, 20261500
Oct 14, 2026150+4
Oct 13, 2026146-9
Oct 09, 2026155+1
Oct 08, 2026154+6
Oct 07, 2026148+2
Oct 06, 2026146+2
Oct 05, 20261440
Oct 02, 2026144No prior observation