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Contract OI history

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May 21, 2027 EXPIRATION

SNDK $640.00 Put

SNDK270521P00640000

Latest saved OI11Oct 23, 2026
Last change+11vs previous saved observation
Saved market days3Oct 16, 2026 onwards
Daily open interest Hover a point for its date and OI
SNDK $640.00 put open interest history 3 saved observations from 2026-10-16 to 2026-10-23. Exact values and changes are listed in the table below. 1150 2026-10-16: 0 OI2026-10-21: 0 OI2026-10-23: 11 OI Oct 16, 2026Oct 23, 2026

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

SNDK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing11+11
Oct 21, 202600
Oct 16, 20260No prior observation