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Contract OI history

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Mar 19, 2027 EXPIRATION

ONON $27.50 Put

ONON270319P00027500

Latest saved OI3,580Oct 23, 2026
Last change+43vs 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. 4,1752,0870 2026-10-02: 4,175 OI2026-10-05: 4,169 OI2026-10-06: 4,164 OI2026-10-07: 4,154 OI2026-10-08: 4,154 OI2026-10-09: 4,154 OI2026-10-13: 3,528 OI2026-10-14: 3,528 OI2026-10-15: 3,528 OI2026-10-16: 3,535 OI2026-10-21: 3,537 OI2026-10-23: 3,580 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, 2026Viewing3,580+43
Oct 21, 20263,537+2
Oct 16, 20263,535+7
Oct 15, 20263,5280
Oct 14, 20263,5280
Oct 13, 20263,528-626
Oct 09, 20264,1540
Oct 08, 20264,1540
Oct 07, 20264,154-10
Oct 06, 20264,164-5
Oct 05, 20264,169-6
Oct 02, 20264,175No prior observation