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Contract OI history

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Oct 23, 2026 EXPIRATION

COST $985.00 Put

COST261023P00985000

Latest saved OI502Oct 23, 2026
Last change+51vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $985.00 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. 5022510 2026-10-09: 1 OI2026-10-13: 1 OI2026-10-14: 1 OI2026-10-15: 400 OI2026-10-16: 421 OI2026-10-21: 451 OI2026-10-23: 502 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, 2026Viewing502+51
Oct 21, 2026451+30
Oct 16, 2026421+21
Oct 15, 2026400+399
Oct 14, 202610
Oct 13, 202610
Oct 09, 20261No prior observation