How can you invest for retirement in a low-interest rate environment? One answer is to invest in bonds. Learn why many retirees choose to invest in bonds, what the risks are, and how to buy them. Investing in a bond fund can help diversify your portfolio. This week's Goldstein on Gelt podcast gives a link for a video about bond laddering and an article that explains how bond funds can increase your portfolio's diversification. Professor Burton G. Malkiel of Princeton University, bestselling author of A Random Walk Down Wall Street, takes the idea of investing at low risk further. He recommends three tools that may help you to invest for retirement in today's low-interest environment and shares his predictions for inflation and interest rates.