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Contract OI history

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Dec 18, 2026 EXPIRATION

FOUR $40.00 Put

FOUR261218P00040000

Latest saved OI465Oct 23, 2026
Last change+1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
FOUR $40.00 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. 4652320 2026-10-02: 411 OI2026-10-05: 407 OI2026-10-06: 408 OI2026-10-07: 408 OI2026-10-08: 408 OI2026-10-09: 413 OI2026-10-13: 439 OI2026-10-14: 439 OI2026-10-15: 443 OI2026-10-16: 448 OI2026-10-21: 464 OI2026-10-23: 465 OI Oct 02, 2026Oct 23, 2026

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

FOUR contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing465+1
Oct 21, 2026464+16
Oct 16, 2026448+5
Oct 15, 2026443+4
Oct 14, 20264390
Oct 13, 2026439+26
Oct 09, 2026413+5
Oct 08, 20264080
Oct 07, 20264080
Oct 06, 2026408+1
Oct 05, 2026407-4
Oct 02, 2026411No prior observation