We use the popular television show <i>Mad Money</i>, hosted by Jim Cramer, to test theories of attention and limits to arbitrage. Stock recommendations on <i>Mad Money</i> constitute attention shocks to a large audience of individual traders. We find that stock recommendations lead to large overnight returns...

Firm-level variables that predict cross-sectional stock returns, such as price-to-earnings and short interest, are often averaged and used to predict the time series of market returns. We extend this literature and limit the data-snooping bias by using a large population of the literature's...