Buying low and selling high is the way to profits for investors, but too many people instead do the opposite and hurt their returns because they cannot not stomach market volatility. Riskalyze, a fintech startup, thinks there is a better way. Its technology assesses an individual’s risk tolerance in a more fine-tuned way than simply categorizing them as aggressive or conservative investors and allocates their assets accordingly. The company says it matches folks with an investment portfolio that more accurately fits their risk tolerance so they can hang on for the long run. In this Knowledge at Wharton interview, Aaron Klein, Riskalyze cofounder and CEO, discusses the startup’s business model that made Fast Company magazine twice name it among the most innovative finance or personal finance companies. He was interviewed by fintech entrepreneur Vinay Nair, founder and chairman of investment firm 55ip and a former finance professor at Wharton. An edited transcript of the conversation follows.…