"Jan. 21 (Bloomberg) -- Investors have turned bullish on the U.S. while tempering their enthusiasm for China as they worry about a market bubble there, according to a Bloomberg survey. An overwhelming majority also see a government debt default on the horizon this year, according to a quarterly poll of investors and analysts who are Bloomberg subscribers. Greece is considered the riskiest government, followed by Argentina, Russia, Ireland, Portugal, Italy, Spain and Mexico." - Frankie Warren