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Contract OI history

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Nov 20, 2026 EXPIRATION

GFS $40.00 Put

GFS261120P00040000

Latest saved OI3,658Oct 23, 2026
Last change+709vs 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. 3,6581,8290 2026-10-09: 1,934 OI2026-10-13: 2,212 OI2026-10-14: 2,212 OI2026-10-15: 2,227 OI2026-10-16: 2,878 OI2026-10-21: 2,949 OI2026-10-23: 3,658 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, 20263,658+709
Oct 21, 2026Viewing2,949+71
Oct 16, 20262,878+651
Oct 15, 20262,227+15
Oct 14, 20262,2120
Oct 13, 20262,212+278
Oct 09, 20261,934No prior observation