VANGUARD BOND INDEX FUNDS LONG-TERM BOND

The Vanguard Long-Term Bond ETF employs an indexing investment approach designed to track the performance of the Barclays U.S. Long Government/Credit Float Adjusted Index. This Index includes all medium and larger issues of U.S. government, investment-grade corporate, and investment-grade international dollar-denominated bonds that have maturities of greater than 10 years and are publicly issued.