OITracker Cboe delayed data

Contract OI history

Back to TOST

Jan 21, 2028 EXPIRATION

TOST $40.00 Call

TOST280121C00040000

Latest saved OI6,436Oct 23, 2026
Last change+47vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $40.00 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. 6,4363,2180 2026-10-02: 6,224 OI2026-10-05: 6,236 OI2026-10-06: 6,236 OI2026-10-07: 6,238 OI2026-10-08: 6,238 OI2026-10-09: 6,241 OI2026-10-13: 6,241 OI2026-10-14: 6,241 OI2026-10-15: 6,341 OI2026-10-16: 6,341 OI2026-10-21: 6,389 OI2026-10-23: 6,436 OI Oct 02, 2026Oct 23, 2026

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

TOST contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20266,436+47
Oct 21, 2026Viewing6,389+48
Oct 16, 20266,3410
Oct 15, 20266,341+100
Oct 14, 20266,2410
Oct 13, 20266,2410
Oct 09, 20266,241+3
Oct 08, 20266,2380
Oct 07, 20266,238+2
Oct 06, 20266,2360
Oct 05, 20266,236+12
Oct 02, 20266,224No prior observation