Vanguard Mid-Cap Growth Index Fund Admiral Shares 

This cost-efficient index fund offers investment in U.S. growth companies with medium market capitalizations. These businesses generally demonstrate faster expansion rates than the average mid-sized firm. The fund's primary goal is to replicate a growth-focused index of medium-sized companies, whose shares are typically more volatile than those of larger corporations. This increased potential for price fluctuations represents a significant risk of the fund. It may be an attractive choice for investors looking to add a passively managed, mid-cap growth allocation as part of an already varied investment portfolio.