On the surface, the Fed's QE3 announcement today may appear to be a repeat of what it's done in...

|By:, SA News Editor

On the surface, the Fed's QE3 announcement today may appear to be a repeat of what it's done in earlier rounds, but it's not, says CNBC's John Carney. In a a stark departure from past practices, the policy is an open-ended expansion with no limit on duration, and it won't go away until the labor market improves.