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Contract OI history

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Jun 17, 2027 EXPIRATION

CIFR $21.00 Put

CIFR270617P00021000

Latest saved OI29Oct 23, 2026
Last change+8vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
CIFR $21.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 29140 2026-10-09: 0 OI2026-10-13: 2 OI2026-10-14: 2 OI2026-10-15: 2 OI2026-10-16: 2 OI2026-10-21: 21 OI2026-10-23: 29 OI Oct 09, 2026Oct 23, 2026

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

CIFR contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing29+8
Oct 21, 202621+19
Oct 16, 202620
Oct 15, 202620
Oct 14, 202620
Oct 13, 20262+2
Oct 09, 20260No prior observation