We study capital structure choices that entrepreneurs make in their firms' initial year of operation, using restricted-access data from the Kauffman Firm Survey. Firms in our data rely heavily on external debt sources, such as bank financing, and less extensively on friends-and-family-based funding sources. Many startups receive debt financed through the personal balance sheets of the entrepreneur, effectively resulting in the entrepreneur holding levered equity claims in their startups. This fact is robust to numerous controls, including credit quality. The reliance on external debt underscores the importance of credit markets for the success of nascent business activity.

We provide estimates of holdings of highly rated securitization tranches of U.S. bank holding companies before the credit crisis and evaluate hypotheses that have been advanced to explain them. Whereas holdings exceeded Tier 1 capital for some large banks, they were economically trivial for the typical bank. Banks with high holdings were not riskier before the crisis using conventional measures, but they performed poorly during the crisis. We find that holdings of highly rated tranches were correlated with a bank's securitization activity. Theories unrelated to the securitization activity, such as "bad incentives" or "bad risk management," are not supported in the data.

We study the trading behavior of investors in an entire stock market. Using an account level dataset of all trades on the Istanbul Stock Exchange in 2005, we identify investors with similar trading behavior as linked in an empirical investor network (EIN). Consistent with the theory of information networks, we find that central investors earn higher returns and trade earlier than peripheral investors with respect to information events. Overall, our results support the view that information diffusion among the investor population influences trading behavior and returns.

We study capital structure choices that entrepreneurs make in their firms' initial year of operation, using restricted-access data from the Kauffman Firm Survey. Firms in our data rely heavily on external debt sources, such as bank financing, and less extensively on friends-and-family-based funding sources. Many startups receive debt financed through the personal balance sheets of the entrepreneur, effectively resulting in the entrepreneur holding levered equity claims in their startups. This fact is robust to numerous controls, including credit quality. The reliance on external debt underscores the importance of credit markets for the success of nascent business activity.

Using bottom-up information from corporate financial statements, we examine the relation between aggregate investment, future equity returns, and investor sentiment. Consistent with the business cycle literature, corporate investments peak during periods of positive sentiment, yet these periods are followed by lower equity returns. This pattern exists in most developed countries and survives controls for discount rates, equity flows, valuation multiples, operating accruals, and other investor sentiment measures. Higher aggregate investments also precede greater earnings disappointments, lower short-window earnings announcement returns, and lower macroeconomic growth. We conclude aggregate corporate investment is an alternative, and possibly sharper, measure of market-wide investor sentiment.

We study the trading behavior of investors in an entire stock market. Using an account level dataset of all trades on the Istanbul Stock Exchange in 2005, we identify investors with similar trading behavior as linked in an empirical investor network (EIN). Consistent with the theory of information networks, we find that central investors earn higher returns and trade earlier than peripheral investors with respect to information events. Overall, our results support the view that information diffusion among the investor population influences trading behavior and returns.

We provide estimates of holdings of highly rated securitization tranches of U.S. bank holding companies before the credit crisis and evaluate hypotheses that have been advanced to explain them. Whereas holdings exceeded Tier 1 capital for some large banks, they were economically trivial for the typical bank. Banks with high holdings were not riskier before the crisis using conventional measures, but they performed poorly during the crisis. We find that holdings of highly rated tranches were correlated with a bank’s securitization activity. Theories unrelated to the securitization activity, such as “bad incentives ” or “bad risk management, ” are not supported in the data. (JEL G01, G21) Holdings of highly rated tranches of securitizations held by U.S. banks were at the heart of the financial crisis of 2007–2008. At least in the early phases of the crisis, the bulk of the assets that were considered to have become toxic by many observers were these securities with subprime and alt-A mortgage collateral. Losses in value led banks to have low capital and forced them to raise more capital, cut back on new loans, and engage in fire sales (see Brunnermeier 2009). The most visible and controversial policy initiative of the U.S. Treasury