In setting our target for the federal funds rate, a good place to start is to identify the rate that would prevail if the economy were at 2 percent inflation and full employment--the so-called neutral rate. “Neutral” in this context means that the rate is neither contractionary nor expansionary.
If the fed funds rate is lower than the neutral rate, then policy is stimulative or accommodative, which will tend to raise growth and inflation. If the fed funds rate is higher than the neutral rate, then policy is tight and will tend to slow growth and reduce inflation.