July 16, 2015 Symbol: PFF Expense Ratio: 0.47% Preferred securities are stock-bond hybrids that pay fat dividends and behave a lot like bonds. Because the prices of bonds and bond-like investments move in the opposite direction of interest rates, iShares U.S. Preferred Stock could be vulnerable to a rise in rates. But the fund’s 5.5% yield might ease the pain. See Kiplinger ETF 20 at a Glance for the complete list of the best exchange-traded funds. Visit Winning Model ETF Portfolios for five examples of how you can put ETFs to work.