The investment seeks to track the performance of a market-weighted corporate bond index with a short-term dollar-weighted average maturity. The fund employs an indexing investment approach designed to track the performance of the Bloomberg Barclays U.S. 1-5 Year Corporate Bond Index. This index includes U.S. dollar-denominated, investment-grade, fixed-rate, taxable securities issued by industrial, utility, and financial companies, with maturities between 1 and 5 years. Under normal circumstances, at least 80% of the fund's assets will be invested in bonds included in the index.