China’s stock market has crashed. A Greek default is certain. The euro looks shaky. U.S. economic data is weak. Inflation is below target. So why on Earth is the Federal Reserve on course to raise interest rates, a move usually designed to slow an overheating economy? According to a recent speech by Fed Chair Janet Yellen, a rate hike is imminent: "I expect that it will be appropriate at some point later this year to take the first step to raise the federal funds rate and thus begin normalizing monetary policy," Yellen said in prepared remarks. "I want to emphasize that the course of the economy and inflation ... (full story)