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Contract OI history

Back to COST

Jan 19, 2029 EXPIRATION

COST $1200.00 Put

COST290119P01200000

Latest saved OI88Oct 23, 2026
Last change+10vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $1200.00 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. 88440 2026-10-09: 27 OI2026-10-13: 27 OI2026-10-14: 27 OI2026-10-15: 51 OI2026-10-16: 69 OI2026-10-21: 78 OI2026-10-23: 88 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, 2026Viewing88+10
Oct 21, 202678+9
Oct 16, 202669+18
Oct 15, 202651+24
Oct 14, 2026270
Oct 13, 2026270
Oct 09, 202627No prior observation