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Contract OI history

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Oct 23, 2026 EXPIRATION

ZETA $28.50 Put

ZETA261023P00028500

Latest saved OI213Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ZETA $28.50 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. 2131060 2026-10-02: 25 OI2026-10-05: 27 OI2026-10-06: 27 OI2026-10-07: 27 OI2026-10-08: 27 OI2026-10-09: 194 OI2026-10-13: 192 OI2026-10-14: 192 OI2026-10-15: 192 OI2026-10-16: 209 OI2026-10-21: 213 OI2026-10-23: 213 OI Oct 02, 2026Oct 23, 2026

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

ZETA contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20262130
Oct 21, 2026Viewing213+4
Oct 16, 2026209+17
Oct 15, 20261920
Oct 14, 20261920
Oct 13, 2026192-2
Oct 09, 2026194+167
Oct 08, 2026270
Oct 07, 2026270
Oct 06, 2026270
Oct 05, 202627+2
Oct 02, 202625No prior observation