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The price effects of liquidity shocks: A study of the SEC’s tick size experiment

Journal of Financial Economics 2020 138(3), 700-724 open access
Do stock prices of publicly listed companies respond to changes in transaction costs? Using the SEC’s pilot program that increased the tick size for approximately 1,200 randomly chosen stocks, we find a stock price decrease between 1.75% and 3.2% for small spread stocks affected by the larger tick size relative to a control group. We find that the increase in the present value of transaction costs accounts for a small percentage of the price decrease. We study channels of price variation due to changes in expected returns: information risk, investor horizon, and liquidity risk. The evidence suggests that trading frictions affect the cost of capital.

Economic News and International Stock Market Co-movement

Review of Finance 2009 13(3), 401-465 open access
We analyze the effects that real-time domestic and foreign news about fundamentals have on the co-movement between stock returns of a small, open economy, Portugal, and a large economy, the United States. Consistent with our theoretical model, we find that US macroeconomic news and Portuguese earnings news do not affect stock market co-movement, whereas Portuguese macroeconomic news lowers stock market co-movement. We find that US news affects Portuguese stock market returns, though less so when US stock market returns are included in the regression. We provide evidence, contrary to common wisdom, that this last result does not derive from contagion.

Resiliency of Environmental and Social Stocks: An Analysis of the Exogenous COVID-19 Market Crash

The Review of Corporate Finance Studies 2020 9(3), 593-621 open access
The COVID-19 pandemic and the subsequent lockdown brought about an exogenous and unparalleled stock market crash. The crisis thus provides a unique opportunity to test theories of environmental and social (ES) policies. This paper shows that stocks with higher ES ratings have significantly higher returns, lower return volatility, and higher operating profit margins during the first quarter of 2020. ES firms with higher advertising expenditures experience higher stock returns, and stocks held by more ES-oriented investors experience less return volatility during the crash. This paper highlights the importance of customer and investor loyalty to the resiliency of ES stocks. (JEL G12, G32, M14) Received: June 3, 2020; editorial decision June 24, 2020 by Editor Andrew Ellul. Authors have furnished an Internet Appendix, which is available on the Oxford University Press Web site next to the link to the final published paper online.

Value creation in shareholder activism

Journal of Financial Economics 2022 145(2), 153-178 open access
We measure value creation by activist investors via structural estimation of a model of the choice between passive investment and activism. Our estimates imply that average returns following activist intent announcements consist of 74.8% expected value creation, or treatment, 13.4% stock picking, and 11.8% sample selection effects. Higher treatment values predict improvements in firm performance and lower proxy contest probabilities, whereas abnormal announcements returns do not, suggesting that our estimate identifies more effective activism campaigns. The evidence demonstrates the importance of using the joint distribution of investment strategies and announcement returns to recover the expected returns and costs of activism.

Mutual Fund Trading, Fund Flows, and ESG Portfolios

Journal of Financial and Quantitative Analysis 2026 61(2), 768-798 open access
This article studies how ESG and conventional mutual funds trade stocks during the COVID-19 crash. Both fund types trade individual stocks similarly: Net purchases of ESG stocks are less sensitive than other stocks to fund flows pre-crash, but sensitivities increase for all stocks during the crash. In contrast, ESG funds’ aggregate net purchases are less sensitive than those of conventional funds during the crash. This difference is due to ESG funds’ portfolio tilt toward the less flow-sensitive ESG stocks. There is no evidence of an ESG clientele effect in trading decisions, as both fund types trade individual stocks similarly.

Citizens United vs. FEC and corporate political activism

Journal of Corporate Finance 2020 60, 101547 open access
This paper analyzes the effect that the U.S. Supreme Court's landmark decision on Citizens United vs. FEC had on corporate political activism. The decision opened the door for corporate treasuries to engage in independent political spending. Politically connected firms have lower announcement returns at the ruling than non-connected firms. The estimates suggest that the value of a political connection decreases by $6.9 million. To evaluate the effect of Citizens United on corporate political activism, we explore the fact that Citizens United also lifts bans on independent political spending in states where such bans existed. After the ruling, firms headquartered in states where bans are lifted have fewer state-level connections relative to firms in other states. Overall, our evidence supports the hypothesis that independent political spending crowds out political connections. We do not find any significant crowding-out effects of independent political expenditures on lobbying activity, executive contributions, and political action committees (PAC) contributions.

International Corporate Governance Spillovers: Evidence from Cross-Border Mergers and Acquisitions

Review of Financial Studies 2019 32(2), 738-770 open access
We test the hypothesis that foreign direct investment promotes corporate governance spillovers in the host country. Using firm-level data from 64 countries during the period 2005–2014, we find that cross-border M&A activity is associated with subsequent improvements in the governance of nontarget firms when the acquirer country has stronger investor protection than the target country. The effect is more pronounced when the target industry is more competitive. Cross-border M&As are also associated with increases in investment and valuation of nontarget firms. Alternative explanations, such as access to global financial markets and cultural similarities, do not appear to explain our findings. Received October 27, 2015; editorial decision March 25, 2018 by Editor Andrew Karolyi. Authors have furnished an Internet Appendix, which is available on the Oxford University Press Web site next to the link to the final published paper online.

How Large Is the Pay Premium from Executive Incentive Compensation?

The Accounting Review 2024 99(5), 35-64 open access
ABSTRACT We estimate the pay premium associated with CEO incentive compensation. Using explicit detailed U.S. CEO compensation contract data and simulation analysis, we find that CEOs with riskier pay packages receive a premium for pay at risk that represents 13.5 percent of total pay. The premium is positively correlated with proxies for CEO risk aversion, but implied risk aversion values suggest that the premium is economically smaller than suggested by prior studies. We perform our tests using a variety of proxies to measure the variance of pay and find consistent evidence of economically small pay risk premiums. These results are consistent with recent findings suggesting that risk may have a more limited influence over the level of pay than previously thought. Data Availability: Data are available from the public sources cited in the text. JEL Classifications: D81; G30; J33.