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Contract OI history

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Dec 18, 2026 EXPIRATION

CYPH $4.00 Put

CYPH261218P00004000

Latest saved OI1,007Oct 23, 2026
Last change-18vs previous saved observation
Saved market days6Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
CYPH $4.00 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. 1,0255120 2026-10-09: 1,007 OI2026-10-13: 1,007 OI2026-10-15: 1,025 OI2026-10-16: 1,025 OI2026-10-21: 1,025 OI2026-10-23: 1,007 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, 2026Viewing1,007-18
Oct 21, 20261,0250
Oct 16, 20261,0250
Oct 15, 20261,025+18
Oct 13, 20261,0070
Oct 09, 20261,007No prior observation