The investment seeks to track the performance of a benchmark index that measures the investment return of the overall U.S. stock market with 60% of its assets; the fund seeks to track the performance of a broad, market-weighted bond index with 40% of its assets. The fund employs an indexing investment approach designed to track the performance of two benchmark indexes. With approximately 60% of its assets, the fund seeks to track the investment performance of the CRSP US Total Market Index. With approximately 40% of its assets, the fund seeks to track the investment performance of the Bloomberg Barclays U.S. Aggregate Float Adjusted Index.