OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

GIS $27.50 Put

GIS261218P00027500

Latest saved OI687Oct 23, 2026
Last change+20vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
GIS $27.50 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. 6873430 2026-10-02: 609 OI2026-10-05: 610 OI2026-10-06: 610 OI2026-10-07: 611 OI2026-10-08: 613 OI2026-10-09: 620 OI2026-10-13: 636 OI2026-10-14: 647 OI2026-10-15: 645 OI2026-10-16: 634 OI2026-10-21: 667 OI2026-10-23: 687 OI Oct 02, 2026Oct 23, 2026

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

GIS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing687+20
Oct 21, 2026667+33
Oct 16, 2026634-11
Oct 15, 2026645-2
Oct 14, 2026647+11
Oct 13, 2026636+16
Oct 09, 2026620+7
Oct 08, 2026613+2
Oct 07, 2026611+1
Oct 06, 20266100
Oct 05, 2026610+1
Oct 02, 2026609No prior observation