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Contract OI history

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Oct 23, 2026 EXPIRATION

CMCSA $21.50 Put

CMCSA261023P00021500

Latest saved OI1,258Oct 23, 2026
Last change+197vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
CMCSA $21.50 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. 1,2586290 2026-10-09: 156 OI2026-10-13: 178 OI2026-10-14: 178 OI2026-10-15: 178 OI2026-10-16: 206 OI2026-10-21: 1,061 OI2026-10-23: 1,258 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, 2026Viewing1,258+197
Oct 21, 20261,061+855
Oct 16, 2026206+28
Oct 15, 20261780
Oct 14, 20261780
Oct 13, 2026178+22
Oct 09, 2026156No prior observation