This paper uses detailed high-frequency regulatory data to evaluate whether trading increases or decreases systemic risk in the U.S. banking sector. We estimate the sensitivity of weekly bank trading net profits to a variety of aggregate risk factors, which include equities, fixed-income,...

The bankruptcy of the investment bank Lehman Brothers was the pivotal event of the 2008 financial crisis and the Great Recession that followed. Ever since the bankruptcy, there has been heated debate about why the Federal Reserve did not rescue Lehman in the same way it rescued other financial...