What's wrong with ETFs? The founder of Vanguard and its former chief investment officer say that they're not as safe as they may seem. Today's Stocks & Topics: Buying Second Half Position, Cash No Longer King, 10 Year Treasury Bonds, Tesla, Investing in Stocks, Wills, Bonds, Roth I-R-A vs. I-R-A, 401k, Technical Analysis, Selling Short.