Vanguard Small-Cap Growth Index Fund Admiral Shares 

This low-cost index fund offers exposure to small-capitalization U.S. growth stocks, which tend to grow more quickly than the broader market. The fund seeks to track a growth-style index of small-sized companies. One of the fund’s primary risks is its focus on the small-cap arena, which is an often-volatile segment of the market. Investors looking to add a passively managed, small-cap growth allocation to an already diversified portfolio may wish to consider this fund.