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Contract OI history

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Dec 18, 2026 EXPIRATION

COST $940.00 Put

COST261218P00940000

Latest saved OI442Oct 23, 2026
Last change+3vs 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. 4422210 2026-10-09: 382 OI2026-10-13: 416 OI2026-10-14: 416 OI2026-10-15: 420 OI2026-10-16: 423 OI2026-10-21: 439 OI2026-10-23: 442 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, 2026Viewing442+3
Oct 21, 2026439+16
Oct 16, 2026423+3
Oct 15, 2026420+4
Oct 14, 20264160
Oct 13, 2026416+34
Oct 09, 2026382No prior observation