In this paper I test the hypothesis that trading activity in the stock and bond markets contains important marketwide pricing information. Using a large sample of actively traded stocks and U.S. Treasury securities, I find that aggregate order imbalances play a strong role in explaining...

We use the NASDAQ market making context to study the role of geographic proximity in the price discovery of a firm's stock. We show that market makers closer to the firm's headquarters spend more time at the inside bid and ask quotes, initiate larger changes in the quotes, and account for...