We propose a new measure of time-varying tail risk that is directly estimable from the cross section of returns. We exploit firm-level price crashes every month to identify common fluctuations in tail risk across stocks. Our tail measure is significantly correlated with tail risk measures...

We study how passive investing affects asset prices. Flows into passive funds raise disproportionately the prices of the largest stocks in the index, while also making them more volatile. If, in addition, stocks are mispriced because of noise traders, then passive flows raise the most the prices...

We study the implications of hedging for firm financing and investment. We do so using an extensive, hand-collected dataset on corporate hedging activities. Hedging can lower the odds of negative firm realizations, reducing the expected costs of financial distress. In theory, this should ease a...

Exchange-traded funds (ETFs) are typically viewed as passive index trackers. In contrast, we show that corporate bond ETFs actively manage their portfolios, trading off index tracking against liquidity transformation. In our model, ETFs optimally choose creation and redemption baskets that...