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Contract OI history

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Nov 20, 2026 EXPIRATION

CMCSA $21.00 Put

CMCSA261120P00021000

Latest saved OI6,987Oct 23, 2026
Last change+31vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
CMCSA $21.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 6,9873,4930 2026-10-09: 3,727 OI2026-10-13: 4,794 OI2026-10-14: 4,794 OI2026-10-15: 4,917 OI2026-10-16: 4,923 OI2026-10-21: 6,956 OI2026-10-23: 6,987 OI Oct 09, 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, 2026Viewing6,987+31
Oct 21, 20266,956+2,033
Oct 16, 20264,923+6
Oct 15, 20264,917+123
Oct 14, 20264,7940
Oct 13, 20264,794+1,067
Oct 09, 20263,727No prior observation