Traders work on the floor of the New York Stock Exchange (NYSE) on February 07, 2023 in New York City. Following remarks by Federal Reserve Chair Jerome Powell that U.S. inflation has started easing, stocks surged on Tuesday with the Dow Jones Industrial Average adding 265.67 points, or 0.78%. (Photo by Spencer Platt/Getty Images)
So-called "shadow traders" avoid scrutiny from regulators by investing in ETFs, according to a new research paper.