Investors have searched high and low for investments to produce income, and one area that they've looked to for high yields is the junk bond market. But recently, many bond analysts believe that the rates that junk bonds offer have fallen so far that they no longer represent a good risk-reward proposition.

In the following video, Fool markets analyst Mike Klesta talks with longtime Fool contributor and financial planner Dan Caplinger about what junk bonds are and why Wall Street is worried about their future prospects. Dan offers some thoughts about ways investors can participate in the junk bond market and explains why investors in the stock market should also keep an eye on junk bonds.