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Contract OI history

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Oct 30, 2026 EXPIRATION

COST $900.00 Put

COST261030P00900000

Latest saved OI384Oct 23, 2026
Last change+18vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $900.00 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. 4152070 2026-10-09: 415 OI2026-10-13: 405 OI2026-10-14: 405 OI2026-10-15: 395 OI2026-10-16: 382 OI2026-10-21: 366 OI2026-10-23: 384 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, 2026Viewing384+18
Oct 21, 2026366-16
Oct 16, 2026382-13
Oct 15, 2026395-10
Oct 14, 20264050
Oct 13, 2026405-10
Oct 09, 2026415No prior observation