Vanguard Growth Index provides a market-cap weighted portfolio of the largest and highest-growth companies in the U.S. equity market. Concentration presents some risks, but its low turnover, tight tracking, and razor-thin expense ratio make this one of the best large-growth funds available. Its admiral, institutional, and exchange-traded fund share classes maintain their Morningstar Analyst Ratings of Gold, while the pricier investor shares retain a Silver rating.