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Contract OI history

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Nov 20, 2026 EXPIRATION

CMCSA $18.50 Put

CMCSA261120P00018500

Latest saved OI36,944Oct 23, 2026
Last change+44vs previous saved observation
Saved market days2Oct 21, 2026 onwards
Daily open interest Hover a point for its date and OI
CMCSA $18.50 put open interest history 2 saved observations from 2026-10-21 to 2026-10-23. Exact values and changes are listed in the table below. 36,94418,4720 2026-10-21: 36,900 OI2026-10-23: 36,944 OI Oct 21, 2026Oct 23, 2026

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

CMCSA contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing36,944+44
Oct 21, 202636,900No prior observation