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Contract OI history

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Jan 21, 2028 EXPIRATION

COST $970.00 Put

COST280121P00970000

Latest saved OI147Oct 23, 2026
Last change+4vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $970.00 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. 147730 2026-10-09: 118 OI2026-10-13: 118 OI2026-10-14: 118 OI2026-10-15: 140 OI2026-10-16: 143 OI2026-10-21: 143 OI2026-10-23: 147 OI Oct 09, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

COST contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing147+4
Oct 21, 20261430
Oct 16, 2026143+3
Oct 15, 2026140+22
Oct 14, 20261180
Oct 13, 20261180
Oct 09, 2026118No prior observation