Investors’ fears of rising interest rates of traditional bonds, have shown an influx in these “go anywhere” funds. With a focus on returns, many investors don’t understand the risk. In the category of a nontraditional bond fund, they hold a large percentage of the portfolios in high-yield bonds, which have huge potential for default. Some of the funds are full of derivatives, along with emerging-markets bonds and illiquid bank loans. Popular unconstrained bond funds suffered declines of 25% during the 2008 financial crisis.