Big Banks Kick Off Earnings Season, IMF Downgrades Global Growth & An Activist Push at Emerson Electric

<p>Carl Quintanilla, David Faber & Mike Santoli discuss the start to quarterly earnings season, JP Morgan, United Health delivering strong results. Plus the IMF downgrading its global growth outlook to the lowest level since the financial crisis. And DE Shaw delivering a searing indictment of waste at Emerson Electric, including a fleet of 8 airplanes - David Faber with all the details.</p>