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Contract OI history

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Nov 20, 2026 EXPIRATION

HCA $430.00 Put

HCA261120P00430000

Latest saved OI380Oct 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 $430.00 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. 6413200 2026-10-02: 540 OI2026-10-05: 550 OI2026-10-06: 550 OI2026-10-07: 550 OI2026-10-08: 550 OI2026-10-09: 550 OI2026-10-13: 551 OI2026-10-14: 552 OI2026-10-15: 618 OI2026-10-16: 641 OI2026-10-21: 378 OI2026-10-23: 380 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, 2026Viewing380+2
Oct 21, 2026378-263
Oct 16, 2026641+23
Oct 15, 2026618+66
Oct 14, 2026552+1
Oct 13, 2026551+1
Oct 09, 20265500
Oct 08, 20265500
Oct 07, 20265500
Oct 06, 20265500
Oct 05, 2026550+10
Oct 02, 2026540No prior observation