Vanguard Total Bond Market 

The fund’s investment objective is to seek to track the performance of a broad, market-weighted bond index. The fund generally: Provides broad exposure to the taxable investment-grade U.S. dollar-denominated bond market, excluding inflation-protected and tax-exempt bonds. Offers relatively high potential for investment income; share value tends to rise and fall modestly. May be more appropriate for medium- or long-term goals where you’re looking for a reliable income stream. Is appropriate for diversifying the risks of stocks in a portfolio.