The Vanguard 0-3 Month Treasury Bill ETF (VBIL) aims to replicate the performance of a market-value-weighted Treasury index characterized by a very short dollar-weighted average maturity. This passively managed fund specifically targets the Bloomberg US Treasury Bills 0-3 Months Index. This benchmark consists of U.S. Treasury Bills that mature within three months, deliberately excluding inflation-protected bonds, floating rate securities, and certain other types of debt. Rather than holding every component, VBIL employs a sampling approach, investing in a selection of securities designed to mirror the comprehensive index's risk factors and overall profile. Ordinarily, the fund commits at least 80%—and typically all—of its assets to either the index's constituent securities or to other investments that the advisor deems economically equivalent. To ensure accurate index tracking, the fund may also utilize debt instruments not explicitly part of the index, cash, cash equivalents, or various money market instruments like repurchase agreements and money market funds (including those affiliated with the advisor). A primary objective is to maintain a dollar-weighted average maturity consistent with the index, which is typically less than three months under normal market conditions.