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Contract OI history

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Jan 21, 2028 EXPIRATION

CMCSA $20.00 Put

CMCSA280121P00020000

Latest saved OI3,420Oct 23, 2026
Last change-2vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
CMCSA $20.00 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. 3,4601,7300 2026-10-09: 3,460 OI2026-10-13: 3,460 OI2026-10-14: 3,460 OI2026-10-15: 3,460 OI2026-10-16: 3,460 OI2026-10-21: 3,422 OI2026-10-23: 3,420 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, 2026Viewing3,420-2
Oct 21, 20263,422-38
Oct 16, 20263,4600
Oct 15, 20263,4600
Oct 14, 20263,4600
Oct 13, 20263,4600
Oct 09, 20263,460No prior observation