The iShares Core S&P 500 ETF provides simple access to 500 top U.S. stocks via one investment. It has a low expense ratio of 0.03%, making it a very affordable way to track the S&P 500.

Investors who prefer to build their portfolios can choose from dozens of low-cost building block iShares ETFs and a robust lineup of traditional fixed-income strategies. The bond team has seen ...