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Contract OI history

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Jan 21, 2028 EXPIRATION

CYPH $2.50 Put

CYPH280121P00002500

Latest saved OI484Oct 23, 2026
Last change0vs previous saved observation
Saved market days6Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
CYPH $2.50 put open interest history 6 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 4842420 2026-10-09: 416 OI2026-10-13: 483 OI2026-10-15: 484 OI2026-10-16: 484 OI2026-10-21: 484 OI2026-10-23: 484 OI Oct 09, 2026Oct 23, 2026

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

CYPH contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing4840
Oct 21, 20264840
Oct 16, 20264840
Oct 15, 2026484+1
Oct 13, 2026483+67
Oct 09, 2026416No prior observation