FTSE 100 group cuts revenue annual forecast just months after upgrading it IG Group Holdings Plc shares plunged the most in almost a decade after the London-based retail trading firm reported a slump in third-quarter revenue. Key points and original sources are listed below.

• FTSE 100 group cuts revenue annual forecast just months after upgrading itS1

• IG Group Holdings Plc shares plunged the most in almost a decade after the London-based retail trading firm reported a slump in third-quarter revenue.S2