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Contract OI history

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Mar 19, 2027 EXPIRATION

CMCSA $21.00 Put

CMCSA270319P00021000

Latest saved OI1,980Oct 23, 2026
Last change+1vs 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. 1,9809900 2026-10-09: 1,882 OI2026-10-13: 1,906 OI2026-10-14: 1,906 OI2026-10-15: 1,905 OI2026-10-16: 1,908 OI2026-10-21: 1,979 OI2026-10-23: 1,980 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, 2026Viewing1,980+1
Oct 21, 20261,979+71
Oct 16, 20261,908+3
Oct 15, 20261,905-1
Oct 14, 20261,9060
Oct 13, 20261,906+24
Oct 09, 20261,882No prior observation