The stock market remains volatile, and investors are tasked with weighing potential opportunities created by sell-offs against macroeconomic and business-specific risk factors. With the market's near-term outlook characterized by uncertainty, investors may want to take a measured approach to stock buying right now, but some companies that have seen big valuation pullbacks could bounce back to deliver incredible returns. Keith Noonan: If you're looking to balance safer portfolio plays with some stocks that have explosive upside potential or just have high risk tolerance, I think QuantumScape (NYSE: QS) deserves consideration right now.