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Contract OI history

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Dec 18, 2026 EXPIRATION

TOST $40.00 Call

TOST261218C00040000

Latest saved OI2,852Oct 23, 2026
Last change+12vs 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. 2,8521,4260 2026-10-02: 1,763 OI2026-10-05: 1,761 OI2026-10-06: 1,761 OI2026-10-07: 1,761 OI2026-10-08: 1,761 OI2026-10-09: 1,773 OI2026-10-13: 1,780 OI2026-10-14: 1,780 OI2026-10-15: 1,780 OI2026-10-16: 1,801 OI2026-10-21: 2,840 OI2026-10-23: 2,852 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, 2026Viewing2,852+12
Oct 21, 20262,840+1,039
Oct 16, 20261,801+21
Oct 15, 20261,7800
Oct 14, 20261,7800
Oct 13, 20261,780+7
Oct 09, 20261,773+12
Oct 08, 20261,7610
Oct 07, 20261,7610
Oct 06, 20261,7610
Oct 05, 20261,761-2
Oct 02, 20261,763No prior observation