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Contract OI history

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Oct 30, 2026 EXPIRATION

COST $880.00 Put

COST261030P00880000

Latest saved OI163Oct 23, 2026
Last change+1vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $880.00 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. 167830 2026-10-09: 161 OI2026-10-13: 150 OI2026-10-14: 150 OI2026-10-15: 167 OI2026-10-16: 167 OI2026-10-21: 162 OI2026-10-23: 163 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, 2026Viewing163+1
Oct 21, 2026162-5
Oct 16, 20261670
Oct 15, 2026167+17
Oct 14, 20261500
Oct 13, 2026150-11
Oct 09, 2026161No prior observation