Volatility slides as stock markets rally, US capital markets correspondent Eric Platt reports. Wall Street's fear gauge, the Vix volatility index, declined for the first time in six trading days on Monday.► Subscribe to FT.com here: http://on.ft.com/2eZZoLI► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubsFor more video content from the Financial Times, visit http://www.FT.com/videoTwitter https://twitter.com/ftvideoFacebook https://www.facebook.com/financialtimes