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Contract OI history

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Dec 18, 2026 EXPIRATION

CMCSA $21.00 Put

CMCSA261218P00021000

Latest saved OI3,025Oct 23, 2026
Last change+296vs 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. 3,0251,5120 2026-10-09: 2,640 OI2026-10-13: 2,655 OI2026-10-14: 2,655 OI2026-10-15: 2,683 OI2026-10-16: 2,820 OI2026-10-21: 2,729 OI2026-10-23: 3,025 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, 2026Viewing3,025+296
Oct 21, 20262,729-91
Oct 16, 20262,820+137
Oct 15, 20262,683+28
Oct 14, 20262,6550
Oct 13, 20262,655+15
Oct 09, 20262,640No prior observation