Vanguard Long-Term Treasury Index Fund Admiral Shares 

This fund aims to replicate the performance of the Bloomberg U.S. Long Treasury Bond Index through an indexing methodology. Its portfolio consists of U.S. government debt securities—specifically those maturing in over a decade—but excludes inflation-protected issues. A significant risk factor for this investment is the considerable sensitivity of long-term bonds to shifts in interest rates. Consequently, a rise in rates could depress the value of the fund's underlying bond holdings, leading to a decrease in its share price. This fund is ideal for investors seeking regular interest income who are also prepared to withstand considerable interest rate risk.