Summary: Some billionaires made their fortunes trading, but a more common path has been much less exciting. Today's Stocks & Topics: PFF - iShares U.S. Preferred Stock ETF, NASDAQ, Delinquencies, Commodities Prices, Master Limited Partnership, CMG - Chipotle Mexican Grill Inc., HP - Helmerich & Payne Inc., Retirement Savings, IMPV - Imperva Inc., Book Value.
