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Contract OI history

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Oct 30, 2026 EXPIRATION

COST $940.00 Put

COST261030P00940000

Latest saved OI346Oct 23, 2026
Last change+26vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $940.00 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. 3461730 2026-10-09: 243 OI2026-10-13: 276 OI2026-10-14: 276 OI2026-10-15: 275 OI2026-10-16: 274 OI2026-10-21: 320 OI2026-10-23: 346 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, 2026Viewing346+26
Oct 21, 2026320+46
Oct 16, 2026274-1
Oct 15, 2026275-1
Oct 14, 20262760
Oct 13, 2026276+33
Oct 09, 2026243No prior observation