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Contract OI history

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Dec 18, 2026 EXPIRATION

TOST $31.00 Put

TOST261218P00031000

Latest saved OI960Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
TOST $31.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 9604800 2026-10-02: 947 OI2026-10-05: 944 OI2026-10-06: 944 OI2026-10-07: 944 OI2026-10-08: 944 OI2026-10-09: 953 OI2026-10-13: 959 OI2026-10-14: 959 OI2026-10-15: 959 OI2026-10-16: 960 OI2026-10-21: 960 OI2026-10-23: 960 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, 2026Viewing9600
Oct 21, 20269600
Oct 16, 2026960+1
Oct 15, 20269590
Oct 14, 20269590
Oct 13, 2026959+6
Oct 09, 2026953+9
Oct 08, 20269440
Oct 07, 20269440
Oct 06, 20269440
Oct 05, 2026944-3
Oct 02, 2026947No prior observation