CNBC | Stocks ends lower amid volatile oil price; BP shares sink CNBC European markets tumbled to close sharply lower on Tuesday as concerns over oil prices returned to haunt markets. The pan-European STOXX 600 finished down over 2 percent, with all sectors closing in negative territory. London's FTSE 100 finished down ... Stocks Drop as Deepening Oil Rout Hits Earnings; Treasuries Jump |