The end of QE2.
(Jim Lo Scalzo for USN&WR)
The Federal Reserve’s $600-billion bond-buying program, commonly known as the second round of quantitative easing, or QE2, is set to expire in June. Once a buyer as big as the Fed exits the market, economists say they’re uncertain of who’s going to step in to fill that gap. If no new buyers emerge, interest rates could rise sharply.