There's a new captain at the helm of the world's most powerful financial institution. Janet Yellen was sworn in as chair of the US Federal Reserve at the start of February. Her arrival has coincided with a great deal of speculation about when short-term interest rates might rise.
The Fed has pledged to keep interest rates low during its current bond-buying programme, which will end by December 2014, but it is unclear how quickly they might rise afterwards. Following the first meeting of the Fed