In recent decades, stock markets have increasingly been speeding up, with large numbers of high-frequency traders executing trades at speeds up to billionths of a second. Does that reward the most powerful computers at the expense of retail investors? Chicago Booth's Eric Budish, who argues that the incentives for high-speed trading stem from the flaws in the way financial markets are designed. At the same time, it's become cumbersome and complicated for institutional investors to execute trades as they would like to. With both challenges in mind, Budish outlines two simple ideas from his research that could transform stock markets for the better.