We take a simple q-theory model and ask how well it can explain external financing anomalies, both qualitatively and quantitatively. Our central insight is that optimal investment is an important driving force of these anomalies. The model simultaneously reproduces procyclical equity issuance...

We use a fully-specified neoclassical model augmented with costly external equity as a laboratory to study the relations between stock returns and equity financing decisions. Simulations show that the model can simultaneously and in many cases quantitatively reproduce: procyclical equity issuance;...

This paper characterizes the equilibrium stock price reaction to arbitrarily distributed signals. This stock price reaction is shown to be proportional to the Fisher score of the news calculated under the risk-neutral probability measure. The expression for the Fisher score takes a particularly...