Investing in low-cost index funds can be a smart and efficient way to build wealth over the long-term. These funds track a specific market index, such as the S&P 500, and offer broad diversification across a range of companies and industries. A benefit of investing in low-cost index funds is that they have lower costs than actively managed funds, which can eventually reduce investment returns. Also, index funds need less time and effort to manage than individual stocks or actively managed funds because they are passively managed. Investors can attain their financial goals more quickly and stress-free by utilizing the minimal costs and extensive diversification provided by index funds.