While investing in index-tracking funds like an S&P 500 ETF can be a great way to mitigate risk, growth stocks and exchange-traded funds (ETFs) can help supercharge your earnings over time. Growth stocks are from companies poised for above-average earnings, and a growth ETF is a fund that only contains these types of stocks. While nobody can say for certain how any investment will fare over time, there's reason to believe these three ETFs will outperform the S&P 500 going forward. Schwab U.S. Large-Cap Growth ETFThe Schwab U.S. Large-Cap Growth ETF (SCHG 0.44%) contains 197 large-cap stocks across 10 industries -- though close to half of its holdings are from the technology industry. 2. iShares Core S&P 500 Growth ETFThe iShares Core S&P 500 Growth ETF (IVW 0.46%) is similar in some ways to the Schwab fund, except it only contains high-growth companies that are listed in the S&P 500.