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Contract OI history

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Mar 19, 2027 EXPIRATION

BOX $40.00 Put

BOX270319P00040000

Latest saved OI178Oct 23, 2026
Last change+67vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BOX $40.00 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 178890 2026-10-02: 0 OI2026-10-05: 0 OI2026-10-06: 0 OI2026-10-07: 0 OI2026-10-08: 0 OI2026-10-13: 0 OI2026-10-14: 0 OI2026-10-15: 0 OI2026-10-16: 4 OI2026-10-20: 111 OI2026-10-23: 178 OI Oct 02, 2026Oct 23, 2026

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

BOX contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing178+67
Oct 20, 2026111+107
Oct 16, 20264+4
Oct 15, 202600
Oct 14, 202600
Oct 13, 202600
Oct 08, 202600
Oct 07, 202600
Oct 06, 202600
Oct 05, 202600
Oct 02, 20260No prior observation