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Contract OI history

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Dec 18, 2026 EXPIRATION

ONON $27.50 Put

ONON261218P00027500

Latest saved OI5,131Oct 23, 2026
Last change+3vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ONON $27.50 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. 5,6912,8450 2026-10-02: 5,691 OI2026-10-05: 5,674 OI2026-10-06: 5,671 OI2026-10-07: 5,653 OI2026-10-08: 5,653 OI2026-10-09: 5,517 OI2026-10-13: 5,205 OI2026-10-14: 5,205 OI2026-10-15: 5,196 OI2026-10-16: 5,166 OI2026-10-21: 5,128 OI2026-10-23: 5,131 OI Oct 02, 2026Oct 23, 2026

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

ONON contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing5,131+3
Oct 21, 20265,128-38
Oct 16, 20265,166-30
Oct 15, 20265,196-9
Oct 14, 20265,2050
Oct 13, 20265,205-312
Oct 09, 20265,517-136
Oct 08, 20265,6530
Oct 07, 20265,653-18
Oct 06, 20265,671-3
Oct 05, 20265,674-17
Oct 02, 20265,691No prior observation