Vanguard Extended Market Index Fund Admiral Shares (VEXAX) is a mutual fund offered by The Vanguard Group Inc that seeks to track the performance of the CRSP US Extended Market Index, providing investors with broad exposure to mid- and small-cap U.S. stocks excluding the largest 500 companies represented in the S&P 500. The fund invests primarily in a statistically sampled portfolio of common stocks; convertible securities; and swap contracts with swap counterparties, with the weighted average maturity of its portfolio typically ranging from three to five years. It serves individual and institutional investors seeking diversified equity exposure beyond large-cap stocks, operating globally through Vanguard's platform with assets under management allocated across various sectors including industrials, financials, consumer discretionary, and information technology. Founded as part of Vanguard's index fund lineup in 2001 and headquartered in Malvern, Pennsylvania, the fund maintains a low expense ratio of 0.06% and focuses on passive management to minimize tracking error relative to its benchmark. Recent developments include Vanguard's 2024 expansion of its admiral share class offerings with enhanced digital access tools for retail investors and a strategic alliance announced in late 2025 with major wirehouses to facilitate greater advisor adoption of low-cost index strategies amid market volatility.