Clear communication is always important in central banking, but it can be especially important when economic conditions call for further policy stimulus but the policy rate is already at its effective lower bound.
Stronger regulation and supervision aimed at problems with underwriting practices and lenders' risk management would have been a more effective and surgical approach to constraining the housing bubble than a general increase in interest rates.
The Federal Reserve has always recognized the importance of allowing markets to work, and government oversight of financial firms will never be fully effective without the aid of strong market discipline.
Monetary policy is most effective when it is coherent, consistent and predictable as possible, while at all times leaving full scope for flexibility and the use of judgment as conditions may require.
Monetary policy has less room to maneuver when interest rates are close to zero, while expansionary fiscal policy is likely both more effective and less costly in terms of increased debt burden when interest rates are pinned at low levels.