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Contract OI history

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Nov 20, 2026 EXPIRATION

CENX $40.00 Put

CENX261120P00040000

Latest saved OI1,302Oct 23, 2026
Last change-11vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
CENX $40.00 put open interest history 7 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 1,3266630 2026-10-08: 1,308 OI2026-10-09: 1,310 OI2026-10-13: 1,325 OI2026-10-14: 1,326 OI2026-10-16: 1,316 OI2026-10-21: 1,313 OI2026-10-23: 1,302 OI Oct 08, 2026Oct 23, 2026

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

CENX contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,302-11
Oct 21, 20261,313-3
Oct 16, 20261,316-10
Oct 14, 20261,326+1
Oct 13, 20261,325+15
Oct 09, 20261,310+2
Oct 08, 20261,308No prior observation