The Federal Reserve Chair Janet Yellen was speaking at an inaugural central banking lecture at the IMF in Washington:

• There is no need to change monetary policy to address financial stability concerns;
  
• She sees "pockets of increased risk-taking across the financial system";
  
• "Efforts to promote financial stability through adjustments in interest rates would increase the volatility of inflation and employment";
  
• The monetary policy should focus on jobs and inflation;
  
• "Monetary policy faces significant limitations as a tool to promote financial stability";
  
• The crisis would not have been prevented or significantly mitigated by substantially tighter monetary policy in the mid-2000s.

The transcript of the whole speech by Janet Yellen can be found here.