The Fund employs an indexing investment approach designed to track the performance of the FTSE US All Cap Choice Index. The Index, which is market capitalization-weighted, is composed of large-, mid-, and small-cap stocks of companies located in the United States that are screened for certain environmental, social, and corporate governance (ESG) criteria by the Index sponsor, which is independent of Vanguard. The FTSE US All Cap Choice Index excludes the stocks of companies that FTSE Russell (FTSE) determines engage in, have a specified level of involvement in, and/or derive threshold amounts of revenue from certain activities or business segments related to the following: adult entertainment, alcohol, tobacco, cannabis, gambling, chemical and biological weapons, cluster munitions, anti-personnel landmines, nuclear weapons, conventional military weapons, civilian firearms, nuclear power, and coal, oil, or gas. The level or type of involvement in, or amount of revenue earned from, certain activities or business segments that lead to exclusion by FTSE can vary from one activity or business segment to another. The Index methodology also excludes the stocks of companies that, as FTSE determines based on its internal assessment, do not meet certain labor, human rights, environmental, and anti-corruption standards as defined by the United Nations Global Compact Principles, as well as companies that do not meet certain diversity criteria. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index.