This working paper gives an overview of the current debate on monetary policy reactions to asset prices, focusing on the developments on equity markets in the United States. It first describes the main causes and consequences of these developments and then surveys the pros and cons of a monetary...

We compare the optimal trading strategy of an informed speculator when he can trade ahead of incoming news (is "fast"), versus when he cannot (is "slow"). We find that speed matters: the fast speculator's trades account for a larger fraction of trading volume, and are more correlated with...