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Contract OI history

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Jan 15, 2027 EXPIRATION

COST $900.00 Put

COST270115P00900000

Latest saved OI1,528Oct 23, 2026
Last change+13vs 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. 1,5447720 2026-10-09: 1,498 OI2026-10-13: 1,527 OI2026-10-14: 1,527 OI2026-10-15: 1,544 OI2026-10-16: 1,533 OI2026-10-21: 1,515 OI2026-10-23: 1,528 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, 2026Viewing1,528+13
Oct 21, 20261,515-18
Oct 16, 20261,533-11
Oct 15, 20261,544+17
Oct 14, 20261,5270
Oct 13, 20261,527+29
Oct 09, 20261,498No prior observation