The fund invests under normal circumstances at least 80% of its total assets (exclusive of collateral held from securities lending) in the component securities of the ICE BofA 0-5 Year U.S. High Yield Constrained Index. The underlying index is an unmanaged index comprised of U.S. dollar denominated below investment grade corporate debt securities publicly issued in the U.S. domestic market with remaining maturities of less than 5 years.