The fund employs an indexing investment approach designed to track the performance of the index, which measures the performance of U.S. dollar-denominated, taxable bonds that are rated either investment-grade or high-yield as determined by the index provider. The fund invests by sampling the index, meaning that it holds a range of securities that, in the aggregate, approximates the full index in terms of key risk factors and other characteristics. The fund seeks to maintain a dollar-weighted average maturity consistent with that of the index.
