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Contract OI history

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Sep 17, 2027 EXPIRATION

GFS $40.00 Put

GFS270917P00040000

Latest saved OI1,365Oct 23, 2026
Last change-2vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
GFS $40.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 1,3696840 2026-10-09: 1,363 OI2026-10-13: 1,363 OI2026-10-14: 1,363 OI2026-10-15: 1,369 OI2026-10-16: 1,367 OI2026-10-21: 1,367 OI2026-10-23: 1,365 OI Oct 09, 2026Oct 23, 2026

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

GFS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,365-2
Oct 21, 20261,3670
Oct 16, 20261,367-2
Oct 15, 20261,369+6
Oct 14, 20261,3630
Oct 13, 20261,3630
Oct 09, 20261,363No prior observation