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Contract OI history

Back to COST

Dec 15, 2028 EXPIRATION

COST $1100.00 Put

COST281215P01100000

Latest saved OI273Oct 23, 2026
Last change+3vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $1100.00 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. 2731360 2026-10-09: 269 OI2026-10-13: 269 OI2026-10-14: 269 OI2026-10-15: 269 OI2026-10-16: 269 OI2026-10-21: 270 OI2026-10-23: 273 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, 2026Viewing273+3
Oct 21, 2026270+1
Oct 16, 20262690
Oct 15, 20262690
Oct 14, 20262690
Oct 13, 20262690
Oct 09, 2026269No prior observation