As the second-longest bull market in history rages on and many indexes keep breaking records, it's fair to wonder if U.S. stocks are overvalued and when this run will end. This is particularly important given how difficult it is for investors to outperform the major stock indexes.
Read MoreFinancial advisers are confronting the possibility that nearly six years of a generally rising stock market has given way to a climate far less forgiving of complacency.
Read More