JNK offers exposure to the "junk" bond space by investing in a index which holds middle rated bonds with at least one year to maturity, and have $600 million or more in outstanding face value. The high yield bond space has been cracked wide open by ETFs, as these products have offered numerous ways for investors to take advantage of this space. High yields can be a great addition to a yield-starved portfolio, as they can offer yields into the double digits for those willing to take on the risks that come along with it. The high returns come from riskier bond choices who have to pay out higher ratios to compensate investors for high risks. this means that the holdings of these ETFs will have higher chances of defaults, and could potentially leave investors out to dry. But for those who have done their homework on the holdings of a particular "junk" bond fund have the ability to generate strong returns from these powerful products. This corporate-bond dominated fund dedicates most of its assets to U.S. debts, though it does offer a significant exposure to foreign corporate notes. JNK will make for a strong investment for those who believe that the corporate bond holdings will make good on their debts, and provide the attractive yields that these products are known for.