Isaac Newton was one of the smartest people to ever live. But there's a big difference between being a smart physicist and smart investor. And, unfortunately for him, Newton learned that the hard way. In an updated and annotated text of Benjamin Graham's classic "The Intelligent Investor," WSJ's Jason Zweig included a small anecdote about Newton's adventures with investing the South Sea Company: "Back in the spring of 1720, Sir Isaac Newton owned shares in the South Sea Company, the hottest stock in England. Sensing that the market was getting out of hand, the great physicist muttered that he 'could calculate the ... (full story)