This study finds that market's underreaction to good news is a driver of Gutierrez and Kelly's (2008) weekly momentum returns. By employing a dataset of 10.1 million news items in four regions (the U.S., Europe, Japan, and Asia Pacific), we find that stocks having important and positive news...

We set up an endowment based asset pricing model in which agents have heterogeneous expectations about the future price level. Expectations are a function of fundamentals, trends, and sentiment. Agents are allowed to switch between expectation formation functions based on past performance as...