Oil firms boost FTSE 100 after upgrade By: MarketWatch June 17, 2013 at 05:04 AM EDT Oil firms lead U.K. stocks higher after a broker upgrade on Monday, while shares of GlaxoSmithKline PLC also show upbeat moves after a target price lift. Read More >> Related Stocks: BP Plc ADR Gsk Plc ADR HSBC Holdings Plc ADR Lloyds Banking Group Plc ADR Royal Bank Scotland Group Plc Royal Dutch Shell Cl B ADR