UK's IG Group heads for worst day since 2016 after cutting revenue forecast

** Shares of online trading platform of IG Group Holdings IGG.L sink 27% to 931p, on track for their worst day since December 2016

** Stock touches its lowest level since April 2025

** Expects 2026 revenue growth to be in a mid-single-digit percentage range, compared with prior forecast for growth toward the upper end of a mid-to-high single-digit target range

** Co expects Q3 2026 revenue of about £240 million ($317.1 million), down 14% y/y on lower over-the-counter revenue retention

** Peers Plus500 down 11.5% at 3024p and CMC Markets CMCX.L falls 8.2% at 604p

** YTD, stock down over 23%

($1 = 0.7568 pounds)