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Contract OI history

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Oct 30, 2026 EXPIRATION

CMCSA $20.50 Put

CMCSA261030P00020500

Latest saved OI345Oct 23, 2026
Last change+67vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
CMCSA $20.50 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. 3451720 2026-10-09: 0 OI2026-10-13: 7 OI2026-10-14: 7 OI2026-10-15: 25 OI2026-10-16: 62 OI2026-10-21: 278 OI2026-10-23: 345 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, 2026Viewing345+67
Oct 21, 2026278+216
Oct 16, 202662+37
Oct 15, 202625+18
Oct 14, 202670
Oct 13, 20267+7
Oct 09, 20260No prior observation