Vanguard Small-Cap Index Fund Institutional Shares 

This economical index fund offers extensive access to the U.S. small-capitalization equity market, by aiming to replicate the performance of an index composed of smaller companies. However, a key consideration is its exclusive focus on the small-cap segment, which is frequently characterized by greater volatility than larger market segments. It serves as an appealing choice for individuals looking to integrate a small-cap equity component into an already varied investment portfolio.