Janet Yellen, the new Federal Reserve board chair who gives testimony to Congress on Tuesday, may need to address deflation risks, says US markets editor Michael Mackenzie. He also discusses with John Authers why stock markets are avoiding a correction.<br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br />Subscribe to the Financial Times on YouTube; http://goo.gl/vUQx5k<br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes
