The U.S. stock market has performed very well overall in the past five years. But nearly 38% of individual stocks are down in the same timeframe, with an average decline of 53.8%. Diversification is a key tool investors may use to manage the risk of owning the “wrong” stocks in a rising market. The iShares Top 20 U.S. Stocks ETF gives investors access to 20 of the biggest companies in the U.S. in a low-cost, tax-efficient wrapper, taking the guesswork out of picking individual stocks.