With Brazil's economy projected to decline 3.5% this year and China's growth expected to hover around 6.3%, the International Monetary Fund once again cut its outlook for the world economy, warning Tuesday that the economic turmoil in China and financial contagion throughout emerging markets threaten to curb global growth. Deeper downturns in many of the world’s largest developing countries and a weaker-than-expected expansion in the US prompted the IMF to downgrade its forecast f...