Vanguard Extended Market Index Fund Admiral Shares 

This fund provides investors with an economical method to gain extensive diversification across American companies with medium and small market capitalizations, all within one convenient offering. It holds shares in approximately 3,000 different enterprises, spanning numerous economic sectors, and collectively accounts for roughly one-quarter of the total valuation of the U.S. stock market. A primary risk associated with this fund is its exclusive focus on the mid- and small-cap segments, which are generally prone to greater price volatility compared to the large-cap market. Designed to be paired with the Vanguard 500 Index Fund, these two investments combined offer complete coverage of the entire U.S. equity landscape.