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Contract OI history

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Jan 21, 2028 EXPIRATION

ZTS $40.00 Call

ZTS280121C00040000

Latest saved OI5,091Oct 23, 2026
Last change-1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ZTS $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. 5,1552,5770 2026-10-02: 4,297 OI2026-10-05: 5,155 OI2026-10-06: 5,154 OI2026-10-07: 5,152 OI2026-10-08: 5,152 OI2026-10-09: 5,149 OI2026-10-12: 5,149 OI2026-10-14: 5,149 OI2026-10-15: 5,146 OI2026-10-16: 5,095 OI2026-10-21: 5,092 OI2026-10-23: 5,091 OI Oct 02, 2026Oct 23, 2026

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

ZTS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing5,091-1
Oct 21, 20265,092-3
Oct 16, 20265,095-51
Oct 15, 20265,146-3
Oct 14, 20265,1490
Oct 12, 20265,1490
Oct 09, 20265,149-3
Oct 08, 20265,1520
Oct 07, 20265,152-2
Oct 06, 20265,154-1
Oct 05, 20265,155+858
Oct 02, 20264,297No prior observation