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Contract OI history

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Mar 19, 2027 EXPIRATION

CIFR $21.00 Put

CIFR270319P00021000

Latest saved OI434Oct 23, 2026
Last change-4vs 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. 4382190 2026-10-09: 392 OI2026-10-13: 413 OI2026-10-14: 413 OI2026-10-15: 413 OI2026-10-16: 438 OI2026-10-21: 438 OI2026-10-23: 434 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, 2026Viewing434-4
Oct 21, 20264380
Oct 16, 2026438+25
Oct 15, 20264130
Oct 14, 20264130
Oct 13, 2026413+21
Oct 09, 2026392No prior observation