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Contract OI history

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Nov 20, 2026 EXPIRATION

COST $600.00 Put

COST261120P00600000

Latest saved OI240Oct 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 $600.00 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. 2401200 2026-10-09: 71 OI2026-10-13: 71 OI2026-10-14: 71 OI2026-10-15: 73 OI2026-10-16: 73 OI2026-10-21: 240 OI2026-10-23: 240 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, 2026Viewing2400
Oct 21, 2026240+167
Oct 16, 2026730
Oct 15, 202673+2
Oct 14, 2026710
Oct 13, 2026710
Oct 09, 202671No prior observation