Vanguard Health Care ETF seeks to track the investment performance of the MSCI US Investable Market Health Care 25/50 Index, a benchmark of large-, mid-, and small-cap United States stocks in the health care sector, as classified under the Global Industry Classification Standard (GICS). This GICS sector is made up of two main industry groups. The first group includes companies that manufacture health care equipment and supplies or provide health care related services (such as distributors of health care products, providers of basic health care services, and owners and operators of health care facilities and organizations). The second group includes companies primarily involved in the research, development, production, and marketing of pharmaceuticals and biotechnology products. The Vanguard Group, Inc., through its Quantitative Equity Group, serves as the investment advisor of the Fund.