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Contract OI history

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Jan 15, 2027 EXPIRATION

CENX $40.00 Put

CENX270115P00040000

Latest saved OI1,125Oct 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 $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. 1,1255620 2026-10-08: 1,122 OI2026-10-09: 1,122 OI2026-10-13: 1,122 OI2026-10-14: 1,122 OI2026-10-16: 1,125 OI2026-10-21: 1,125 OI2026-10-23: 1,125 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, 2026Viewing1,1250
Oct 21, 20261,1250
Oct 16, 20261,125+3
Oct 14, 20261,1220
Oct 13, 20261,1220
Oct 09, 20261,1220
Oct 08, 20261,122No prior observation