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Contract OI history

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Dec 15, 2028 EXPIRATION

SEI $27.50 Put

SEI281215P00027500

Latest saved OI1Oct 23, 2026
Last change-2vs previous saved observation
Saved market days9Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
SEI $27.50 put open interest history 9 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 310 2026-10-02: 2 OI2026-10-06: 3 OI2026-10-07: 3 OI2026-10-08: 3 OI2026-10-09: 3 OI2026-10-13: 3 OI2026-10-15: 3 OI2026-10-20: 3 OI2026-10-23: 1 OI Oct 02, 2026Oct 23, 2026

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

SEI contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1-2
Oct 20, 202630
Oct 15, 202630
Oct 13, 202630
Oct 09, 202630
Oct 08, 202630
Oct 07, 202630
Oct 06, 20263+1
Oct 02, 20262No prior observation