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Contract OI history

Back to COST

Jan 15, 2027 EXPIRATION

COST $440.00 Put

COST270115P00440000

Latest saved OI632Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $440.00 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. 6343170 2026-10-09: 634 OI2026-10-13: 634 OI2026-10-14: 634 OI2026-10-15: 632 OI2026-10-16: 632 OI2026-10-21: 632 OI2026-10-23: 632 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, 2026Viewing6320
Oct 21, 20266320
Oct 16, 20266320
Oct 15, 2026632-2
Oct 14, 20266340
Oct 13, 20266340
Oct 09, 2026634No prior observation