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Contract OI history

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Oct 23, 2026 EXPIRATION

TOST $31.50 Call

TOST261023C00031500

Latest saved OI150Oct 23, 2026
Last change-100vs previous saved observation
Saved market days11Oct 05, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $31.50 call open interest history 11 saved observations from 2026-10-05 to 2026-10-23. Exact values and changes are listed in the table below. 2501250 2026-10-05: 15 OI2026-10-06: 17 OI2026-10-07: 25 OI2026-10-08: 25 OI2026-10-09: 30 OI2026-10-13: 58 OI2026-10-14: 58 OI2026-10-15: 59 OI2026-10-16: 54 OI2026-10-21: 250 OI2026-10-23: 150 OI Oct 05, 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, 2026150-100
Oct 21, 2026Viewing250+196
Oct 16, 202654-5
Oct 15, 202659+1
Oct 14, 2026580
Oct 13, 202658+28
Oct 09, 202630+5
Oct 08, 2026250
Oct 07, 202625+8
Oct 06, 202617+2
Oct 05, 202615No prior observation