OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

S $21.00 Call

S261218C00021000

Latest saved OI4,028Oct 23, 2026
Last change-43vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
S $21.00 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 4,0712,0350 2026-10-02: 2,981 OI2026-10-05: 2,966 OI2026-10-06: 2,963 OI2026-10-07: 2,963 OI2026-10-08: 2,963 OI2026-10-09: 2,887 OI2026-10-13: 2,886 OI2026-10-14: 2,886 OI2026-10-15: 2,861 OI2026-10-16: 2,832 OI2026-10-21: 4,071 OI2026-10-23: 4,028 OI Oct 02, 2026Oct 23, 2026

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

S contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing4,028-43
Oct 21, 20264,071+1,239
Oct 16, 20262,832-29
Oct 15, 20262,861-25
Oct 14, 20262,8860
Oct 13, 20262,886-1
Oct 09, 20262,887-76
Oct 08, 20262,9630
Oct 07, 20262,9630
Oct 06, 20262,963-3
Oct 05, 20262,966-15
Oct 02, 20262,981No prior observation