Fed policymakers do their own math on 'average' inflation

A day after rolling out a new strategy for U.S. monetary policy, Federal Reserve officials on Friday diverged over what it might mean in practice, saying there is no exact formula for the average inflation rate they plan to target.While the aim of the new strategy is to allow higher inflation and, as a side-effect, additional job growth over time, Fed policymakers differed over just how much more inflation they will tolerate or what metrics they will be looking at - a complication for investors