Vanguard Total Bond Market II Idx Inv VTBIX

The fund employs an indexing investment approach designed to track the performance of the Bloomberg U.S. Aggregate Float Adjusted Index. It invests by sampling the index, meaning that it holds a broadly diversified collection of securities that, in the aggregate, approximates the full index in terms of key risk factors and other characteristics. The fund invests at least 80% of its assets in bonds held in the index.