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The Effect of Short Selling on Market Reactions to Earnings Announcements*

Contemporary Accounting Research 2010 27(2), 609-638
This paper examines the effect of the inherent demand implied by short interest by studying how stock price reactions to earnings announcements depend on the level of short interest. We find that, for extreme good and bad news events, the inherent demand increases stock prices around the earnings announcement date, with the effect being stronger for good news relative to bad news. Specifically, the initial market reaction to an extreme positive earnings surprise is larger for firms with high levels of short interest. On the other hand, for an extreme negative earnings surprise event, the initial market reaction is less negative for heavily shorted firms. Furthermore, we find that the post-earnings-announcement drift is smaller (larger) in magnitude for extreme positive (negative) earnings surprises for the heavily shorted firms.

A theory of contractual provisions in leasing

Journal of Financial Intermediation 2010 19(1), 116-142
We develop a non-tax rationale for leasing in a double-sided asymmetric information setting, and analyze how various contractual provisions in leasing contracts arise in equilibrium. In our model, a manufacturer of capital goods has private information about their quality; entrepreneurs (users of these capital goods) come to learn this quality only by using them over a period of time. Each unit of the capital goods requires a certain level of maintenance in each period. Entrepreneurs differ in their cost of providing this maintenance; this maintenance cost is information private to each entrepreneur. Leasing emerges as an equilibrium solution to this double-sided asymmetric information problem. Various contractual provisions in leasing contracts (e.g., short-term versus long-term leases with non-cancellation provisions, option to buy at lease termination, and service leases) also emerge as equilibrium solutions under alternative settings. Leases with metering provisions emerge in equilibrium when, in addition to the maintenance cost, entrepreneurs differ in other dimensions, such as their intensity of usage of the capital good. Our model has implications for the lease-versus-sell decision, the situations under which various leasing contract provisions will be used, and for the relative magnitudes of sales prices and leasing costs (for leases with different contractual provisions).

Property rights, political connections, and corporate investment

Review of Finance 2024 28(2), 593-619 open access
We study the impact of an urban land titling program on firm investment in Shenzhen, China. We find that this program increased the investment rate for titling firms, but this positive effect only holds for politically connected firms. Further analysis suggests that the titling effect is more pronounced for those titling firms associated with greater expropriation risk. During program implementation, the connected titling firms increased their investment perhaps because, as observed, they experienced fewer disputes than non-connected titling firms.

Marijuana Legalization and Firms’ Cost of Equity

Journal of Financial and Quantitative Analysis 2026 61(3), 1112-1147
After medical marijuana legalization (MML) by U.S. states, firms’ cost of equity (COE) decreases, especially for those with more growth opportunities, higher productivity, or a more skilled workforce. This policy change also reduces firm risk and leads to an increase in labor supply through increased labor force participation, employment, hours worked, and net migration. Further, home prices rise after MML, reflecting increased local housing demand due to a growing supply of workers. These findings align with theoretical models that link asset prices to labor markets and suggest that MML can lower firms’ COE by mitigating labor search frictions.

Deadly Debt Crises: COVID-19 in Emerging Markets

Review of Economic Studies 2024 91(3), 1243-1290
Emerging markets have experienced large human and economic costs from coronavirus disease 2019, and their tight fiscal space has limited the support extended to their citizens. We study the impact of an epidemic on economic and health outcomes by integrating epidemiological dynamics into a sovereign default model. The sovereign’s option to default tightens fiscal space and results in an epidemic with limited mitigation and depressed consumption. A quantitative analysis of our model accounts well for the dynamics of fatalities, social distancing, consumption, sovereign debt, and spreads in Latin America. We find that because of default risk, the welfare cost of the pandemic is about a third higher than it is in a version of the model with perfect financial markets. We study debt relief programs and find a compelling case for their implementation. These programs deliver large social gains, improving health and economic outcomes for the country at no cost to international lenders or financial institutions.

Accounting Standards Harmonization and Financial Integration

Contemporary Accounting Research 2019 36(4), 2437-2466 open access
We empirically examine whether adopting a uniform set of accounting standards mitigates information frictions in financial markets and facilitates market integration. Using a difference‐in‐difference design, we find that after the mandatory adoption of IFRS local stock returns incorporate more global information and at a faster speed. The effect of IFRS adoption is stronger in countries where there are larger improvements in accounting comparability and for firms with a larger increase in foreign ownership. Overall, our results suggest that accounting standards harmonization facilitates financial market integration.

Reference-dependent preferences and the risk–return trade-off

Journal of Financial Economics 2017 123(2), 395-414 open access
This paper studies the cross-sectional risk–return trade-off in the stock market. A fundamental principle in finance is the positive relation between risk and expected return. However, recent empirical evidence suggests the opposite. Using several intuitive risk measures, we show that the negative risk–return relation is much more pronounced among firms in which investors face prior losses, but the risk–return relation is positive among firms in which investors face prior gains. We consider a number of possible explanations for this new empirical finding and conclude that reference-dependent preference is the most promising explanation.

Decentralized Privatization and Change of Control Rights in China

Review of Financial Studies 2018 31(10), 3854-3894
The design and implementation of privatization in China is unique in that both are decentralized and administered by the local governments. Based on a proprietary survey data set containing 3, 000 firms in over 200 cities, this paper studies privatization choices and outcomes, as well as the mechanism behind the outcomes. We find that less political opposition to labor downsizing and greater fiscal capacity prompt cities to choose direct sales to insiders (MBOs). This method transfers control rights to private owners, retains limited government supports, imposes hardened budget constraints, allows for restructuring, and achieves performance improvement. Received September 8, 2015; editorial decision February 3, 2017 by Editor Andrew Karolyi.

Collateral-Motivated Financial Innovation

Review of Financial Studies 2014 27(10), 2961-2997
Collateral frictions have a profound effect on our economic landscape, ranging from the design of financial securities, laws, and institutions, to various rules and regulations. We analyze a model with disagreement, where securities and collateral requirements are endogenous. It shows that the security that isolates the variable with disagreement is “optimal” in the sense that alternative securities cannot generate any trading. In an economy with N states, investors may introduce more than N securities, and markets are still incomplete. The model has several novel predictions on the behavior of basis—the spread between the prices of an asset and its replicating portfolio.

Downside risk and the performance of volatility-managed portfolios

Journal of Banking & Finance 2021 131, 106198
Recent studies find mixed evidence on the performance of volatility-managed portfolios. We show that strategies scaled by downside volatility exhibit significantly better performance than strategies scaled by total volatility. The improved performance is evident in spanning regressions, direct Sharpe-ratio comparisons, and real-time trading strategies. A decomposition analysis indicates that the enhanced performance of downside volatility-managed portfolios is primarily due to return timing, i.e., downside volatility negatively predicts future returns. We find that employing fixed-weight strategies significantly improves the performance of volatility-managed portfolios for real-time investors. Our results hold for nine equity factors and a broad sample of 94 anomaly portfolios.