Given that the U.S. Federal Reserve is stepping back some of its maneuvers to keep interest rates low, interest rates are expected to increase to more normal levels. Normal means that interest rates are generally dictated by the rate of inflation plus a spread. In the case of the U.S. 10-year Treasury bond, the spread has averaged about 2.4%, though that level has been quite volatile. If one puts that 2.4% spread on top of the current inflation rate of 1.5% (as of Apr. 2014), one could expect an interest rate of 3.9% (compared with 1.8% at the end of 2012 and 2.9% at the end of 2013). Yet, it might take some time to get there. Higher rates are generally bad news for the economy as they tend to slow both housing and auto activity.