EFF: I have a new paper, "Does the Fed Control Interest Rates?". In it, I find that The Federal funds rate, FF, moves strongly toward the Fed's target, TF, but other rates show little day-to-day convergence to TF. When the Fed changes TF, it moves toward existing short rates. This suggests a passive Fed that follows the market, but it is also consistent with an active Fed that controls rates and rates adjust to reflect predictable changes in TF. When TF changes, short rates move toward the new TF. This is consistent with a Fed that controls short rates or a Fed that has no control but is an informed investor whose signals affect rates.
Eugene Fama and Ken French are members of the Board of Directors for and provide consulting services to Dimensional Fund Advisors LP.