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Contract OI history

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Jun 17, 2027 EXPIRATION

COST $940.00 Put

COST270617P00940000

Latest saved OI191Oct 23, 2026
Last change+29vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $940.00 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. 191950 2026-10-09: 154 OI2026-10-13: 157 OI2026-10-14: 157 OI2026-10-15: 157 OI2026-10-16: 159 OI2026-10-21: 162 OI2026-10-23: 191 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, 2026Viewing191+29
Oct 21, 2026162+3
Oct 16, 2026159+2
Oct 15, 20261570
Oct 14, 20261570
Oct 13, 2026157+3
Oct 09, 2026154No prior observation