Vanguard Long-Term Treasury Fund Admiral Shares 

This fund primarily allocates at least 80% of its assets to fixed-income securities issued directly by the U.S. government. These include Treasury bills, notes, bonds, and inflation-protected securities (TIPS). Additionally, the fund may hold debt issued by federal agencies that are sponsored, guaranteed, or owned by the U.S. government. A principal risk associated with this fund is its sensitivity to interest rate fluctuations. Changes in interest rates, whether rising or falling, can adversely affect the fund's value by leading to lower bond prices or a reduction in its overall income stream. It is designed for investors who seek to generate interest income and are prepared to accept significant interest rate volatility.