“... Early on, Simons made a decision to dig through mountains of data, employ advanced mathematics, and develop cutting-edge computer models, while others were still relying on intuition, instinct, and old-fashioned research for their own predictions. Simons inspired a revolution that has since swept the investing world. By early 2019, hedge funds and other quantitative, or quant, investors had emerged as the market's largest players, controlling about 30 percent of stock trading, topping the activity of both individual investors and traditional investing firms. ...”