Vanguard Short-Term Bond Index Adm (VBIRX)

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 between 1 and 5 years and are publicly issued. All of the fund's investments will be selected through the sampling process, and at least 80% of its assets will be invested in bonds held in the index.