OITracker Cboe delayed data

Contract OI history

Back to KOS

Jan 21, 2028 EXPIRATION

KOS $2.50 Put

KOS280121P00002500

Latest saved OI2,423Oct 23, 2026
Last change+30vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
KOS $2.50 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 2,4231,2110 2026-10-02: 2,362 OI2026-10-06: 2,370 OI2026-10-07: 2,370 OI2026-10-08: 2,370 OI2026-10-09: 2,370 OI2026-10-13: 2,366 OI2026-10-14: 2,366 OI2026-10-15: 2,374 OI2026-10-16: 2,374 OI2026-10-20: 2,393 OI2026-10-23: 2,423 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

KOS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing2,423+30
Oct 20, 20262,393+19
Oct 16, 20262,3740
Oct 15, 20262,374+8
Oct 14, 20262,3660
Oct 13, 20262,366-4
Oct 09, 20262,3700
Oct 08, 20262,3700
Oct 07, 20262,3700
Oct 06, 20262,370+8
Oct 02, 20262,362No prior observation