Chip Somodevilla / Getty Images President Donald Trump has lobbed a series of threats and criticisms at Federal Reserve Chair Jerome Powell this year Key Takeaways President Trump has repeatedly attacked Federal Reserve Chair Jerome Powell this year, even suggesting he could fire him. A new study links prediction markets and stock prices to estimate the potential market fallout if Powell were fired. Researchers focused on a two-hour window on July 16, between the initial reports suggesting Powell mig ...