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Proprietary Costs: Why Do R&D-Active Firms Choose Single-Lender Financing?

The Accounting Review 2022 97(6), 263-296
We examine whether proprietary costs drive R&D-active firms' choice of private loan structure. We find that R&D-active firms are more likely to choose single-lender over multi-lender private loan financing. This is consistent with the theory that high-ability entrepreneurs protect their proprietary knowledge by communicating it to a single lender while disclosing generic and less sensitive information to the public. This propensity, however, significantly decreases after the enactment of the American Inventor's Protection Act (AIPA), which accelerated public disclosure of firms' patent details in filings with the U.S. Patent and Trademark Office. This accelerated public disclosure potentially caused R&D information to spill over to rivals, increasing the proprietary costs of single-lender borrowers. AIPA enactment also increased the spread on R&D-active firms' single-lender loans. These findings contribute to the voluntary disclosure and financing choice literature by linking R&D-active firms' choice of single-lender financing to the proprietary costs of public disclosure. Data Availability: From public sources identified in the study.

Private Firm Investment and Public Peer Misvaluation

The Accounting Review 2019 94(6), 31-60
We study how public firm misvaluation affects private peer firm investments. An economic competition hypothesis predicts a negative relation because misvaluation-induced new investment by public firms crowds out investment by private peers that share common input or output markets. An alternative shared sentiment hypothesis predicts a positive relation because private firm stakeholders share in the sentiment associated with misvaluation in public markets. Misvaluation is proxied using both the price-to-fundamental ratio and an exogenous instrument obtained from mutual fund flows. The evidence is consistent with the shared sentiment hypothesis, and robust to alternative treatments for growth opportunities. Private firms finance misvaluation-induced investment primarily internally or externally with debt, not equity. Finally, misvaluation-induced investment increases future return on investment for private firms, in contrast with public firms. Overall, these findings suggest that overvaluation in public markets increases private firm investments and has beneficial effects on private firm investments by relaxing financing constraints. JEL Classifications: G32; M41. Data Availability: Data are available from sources identified in the paper.

Economic links from bonds and cross-stock return predictability

Journal of Financial Economics 2025 171, 104110
Identifying firms’ bond-market-specific economic links through credit-rating comovement of their corporate bonds, a long-short strategy for stocks based on these links generates a risk-adjusted alpha of 0.45% per month, which cannot be explained by existing economic links in the literature. Market segmentation between the equity and bond markets appears to be the underlying mechanism: (i) The cross-return predictability is muted in the bond market; (ii) The cross-return predictability is mitigated in the presence of cross-holding investors; (iii) Equity analysts slowly incorporate information from rating-comovement links to their forecasts.

A frog in every pan: Information discreteness and the lead-lag returns puzzle

Journal of Financial Economics 2022 145(2), 83-102
We re-examine the puzzling pattern of lead-lag returns among economically-linked firms. Our results show that investors consistently underreact to information from lead firms that arrives continuously, while information with the same cumulative returns arriving in discrete amounts is quickly absorbed into price. This finding holds across many different types of economic linkages, including shared-analyst-coverage. We conclude that the ǣfrog in the panǥ (FIP) momentum effect is pervasive in co-momentum settings, suggesting that information discreteness (ID) serves as a cognitive trigger that reduces investor inattention and improves inter-firm news transmission.

Driven to Distraction: Extraneous Events and Underreaction to Earnings News

Journal of Finance 2009 64(5), 2289-2325 open access
Recent studies propose that limited investor attention causes market underreactions. This paper directly tests this explanation by measuring the information load faced by investors. The investor distraction hypothesis holds that extraneous news inhibits market reactions to relevant news. We find that the immediate price and volume reaction to a firm's earnings surprise is much weaker, and post‐announcement drift much stronger, when a greater number of same‐day earnings announcements are made by other firms. We evaluate the economic importance of distraction effects through a trading strategy, which yields substantial alphas. Industry‐unrelated news and large earnings surprises have a stronger distracting effect.

Earnings Management and the Long‐Run Market Performance of Initial Public Offerings

Journal of Finance 1998 53(6), 1935-1974 open access
Issuers of initial public offerings (IPOs) can report earnings in excess of cash flows by taking positive accruals. This paper provides evidence that issuers with unusually high accruals in the IPO year experience poor stock return performance in the three years thereafter. IPO issuers in the most “aggressive” quartile of earnings managers have a three‐year aftermarket stock return of approximately 20 percent less than IPO issuers in the most “conservative” quartile. They also issue about 20 percent fewer seasoned equity offerings. These differences are statistically and economically significant in a variety of specifications.

Constrained Efficiency in the Neoclassical Growth Model With Uninsurable Idiosyncratic Shocks

Econometrica 2012 80(6), 2431-2467 open access
We investigate the welfare properties of the one-sector neoclassical growth model with uninsurable idiosyncratic shocks. We focus on the notion of constrained efficiency used in the general equilibrium literature. Our characterization of constrained efficiency uses the first-order condition of a constrained planner’s problem. This condition highlights the margins of relevance for whether capital is too high or too low: the factor composition of income of the (consumption-) poor. Using three calibrations commonly considered in the literature, we illustrate that there can be either over- or underaccumulation of capital in steady state and that the constrained optimum may or may not be consistent with a nondegenerate long-run distribution of wealth. For the calibration that roughly matches the income and wealth distribution, the constrained inefficiency of the market outcome is rather striking: it has much too low a steady-state capital stock.

Intraday momentum in the VIX futures market

Journal of Banking & Finance 2023 148, 106746
This study examines intraday momentum in the unexplored VIX futures market and verifies its existence through various empirical tests. The intraday momentum of VIX futures appears to be robust across contracts with different expirations, intraday returns with different time intervals, different trading sessions, and multiple sub-periods. We propose that the hedging demand of VIX option market makers may contribute to the intraday momentum. Our empirical evidence shows that intraday momentum persists only when the net gamma exposure of VIX options is negative and the effect weakens when European investors are away from the market, supporting our proposed explanation. Strikingly, we also find that trading strategies based on intraday momentum can generate an average annualized return of up to nearly 18%.

Trading without meeting friends: Empirical evidence from the wuhan lockdown in 2020

Journal of Banking & Finance 2025 171, 107355 open access
Using a unique proprietary dataset of daily mutual fund trading records and the COVID-19 pandemic-triggered lockdown in Wuhan (China) as a natural experiment, we find that individual mutual fund investors in Wuhan significantly reduced their daily trading frequency, total investment of their portfolios, and risk level of their invested funds during the lockdown period as compared to investors in other cities. The results suggest that the elimination of face-to-face interaction among individual investors during the lockdown reduced their information sharing, which led to more conservatism in their financial trading. We rule out alternative explanations of salience bias due to limited investor attention and temporary changes in personal circumstances such as depression and/or income reduction, during the lockdown period. Finally, consistent with the theory of naïve investor trading, we also find that investors received higher trading returns during the lockdown as they reduced trading aggressively in the absence of face-to-face interactions.

Tunneling or Value Added? Evidence from Mergers by Korean Business Groups

Journal of Finance 2002 57(6), 2695-2740
We examine whether firms belonging to Korean business groups (chaebols) benefit from acquisitions they make or whether such acquisitions provide a way for controlling shareholders to increase their wealth by increasing the value of other group firms (tunneling). We find that when a chaebol‐affiliated firm makes an acquisition, its stock price on average falls. While minority shareholders of a chaebol‐affiliated firm making an acquisition lose, the controlling shareholder of that firm on average benefits because the acquisition enhances the value of other firms in the group. This evidence is consistent with the tunneling hypothesis.