The Vanguard Long-Term Bond Index Fund Insti Shs (VBLLX) is a mutual fund that invests in a diverse portfolio of long-term bonds. This fund is managed by Vanguard, a reputable investment management company, and is designed for institutional investors. VBLLX aims to provide long-term capital growth and income through its investments in high-quality, investment-grade bonds with longer maturities. This fund offers a low-cost and low-risk option for investors looking to add stability and income to their portfolio.