S&P 500

US GDP growth for the first quarter has been revised down in the second estimate from the Bureau of Economic Analysis (BEA).

US stocks saw their first weekly gain since April as Greek election polls revealed support for pro-bailout parties and data showed the American housing market is stabilizing.

CONTRARIAN INVESTOR

Wall Street opened lower today, joining a global equity slump triggered by mounting concerns over Greece's future in the eurozone.

Stocks on Wall Street rallied on strong industrial production figures today, despite renewed fears over a potential Greek exit from the euro.

US stocks slumped overnight, pressuring the Dow Jones Industrial Average near to a four-month low, as political concerns in Greece continued to cloud the outlook for the global economy.

Markets across Europe suffered more losses this afternoon after Greece reportedly confirmed it has failed to form a coalition government.

TECHNICAL

BlackRock's Bob Doll said stock prices need to rise and bond prices need to fall before American investors will buy US stocks again.

US stocks ended the day firmly lower on Thursday, after the ISM services sector purchasing managers´ index for the month of April disappointed.