Motley Fool Money: 09.30.2011

Amazon introduces a Fiery challenger to the iPad. Warren Buffett announces a historic buy. Netflix makes a big deal. And Groupon takes half-off its revenues. Our analysts discuss those stories and share some stocks on their radar. Plus, Harvard Business Review Group editorial director Justin Fox discusses his book, The Myth of the Rational Market: A History of Risk, Reward, and Delusion on Wall Street. Learn more about your ad choices. Visit megaphone.fm/adchoices