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Contract OI history

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Dec 15, 2028 EXPIRATION

COST $620.00 Put

COST281215P00620000

Latest saved OI47Oct 23, 2026
Last change+25vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $620.00 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. 47230 2026-10-09: 21 OI2026-10-13: 21 OI2026-10-14: 21 OI2026-10-15: 21 OI2026-10-16: 21 OI2026-10-21: 22 OI2026-10-23: 47 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, 2026Viewing47+25
Oct 21, 202622+1
Oct 16, 2026210
Oct 15, 2026210
Oct 14, 2026210
Oct 13, 2026210
Oct 09, 202621No prior observation