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Contract OI history

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Jan 21, 2028 EXPIRATION

COHR $55.00 Put

COHR280121P00055000

Latest saved OI509Oct 23, 2026
Last change+5vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
COHR $55.00 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. 5092540 2026-10-02: 298 OI2026-10-05: 298 OI2026-10-06: 302 OI2026-10-07: 302 OI2026-10-08: 302 OI2026-10-09: 302 OI2026-10-13: 362 OI2026-10-14: 362 OI2026-10-15: 362 OI2026-10-16: 362 OI2026-10-21: 504 OI2026-10-23: 509 OI Oct 02, 2026Oct 23, 2026

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

COHR contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing509+5
Oct 21, 2026504+142
Oct 16, 20263620
Oct 15, 20263620
Oct 14, 20263620
Oct 13, 2026362+60
Oct 09, 20263020
Oct 08, 20263020
Oct 07, 20263020
Oct 06, 2026302+4
Oct 05, 20262980
Oct 02, 2026298No prior observation