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Contract OI history

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Dec 18, 2026 EXPIRATION

CENX $35.00 Put

CENX261218P00035000

Latest saved OI1,160Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
CENX $35.00 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. 1,1605800 2026-10-08: 1,136 OI2026-10-09: 1,136 OI2026-10-13: 1,142 OI2026-10-14: 1,142 OI2026-10-16: 1,143 OI2026-10-21: 1,160 OI2026-10-23: 1,160 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, 2026Viewing1,1600
Oct 21, 20261,160+17
Oct 16, 20261,143+1
Oct 14, 20261,1420
Oct 13, 20261,142+6
Oct 09, 20261,1360
Oct 08, 20261,136No prior observation