This passively-managed index fund will invest in a portfolio of below investment grade bonds, sometimes referred to as "junk bonds." It will seek to track the performance of a U.S. dollar-denominated, below investment grade corporate bond index. Like other bond funds, the fund is subject to interest rate risk; increases in interest rates may cause the price of the bonds in the portfolio to decrease, reducing the fund’s net asset value. Because of its exposure to lower-credit-quality securities it is also subject to credit risk; negative perceptions about an issuer’s ability to make its interest or principal payments in a timely manner may cause the price of that bond to decrease.