LONDON MARKETS Miners Weigh On U.K. Stocks As Metals Prices Fall

LONDON – Mining firms drove U.K. stocks lower on Tuesday, as metals prices dropped and a Rio Tinto PLC executive warned of downward pressure on iron-ore prices.The FTSE 100 index dropped 0.4% to 6,435.49, on track for a third straight day of losses.Shares of heavyweight miner Rio Tinto (RIO) slumped 4.3%, as Greg Lilleyman, president of the firm's Pilbara iron-ore operations said he ...