The Journal of Finance

Informational Frictions and Commodity Markets

Published: 03/09/2015   |   DOI: 10.1111/jofi.12261

MICHAEL SOCKIN, WEI XIONG

This paper develops a model with a tractable log‐linear equilibrium to analyze the effects of informational frictions in commodity markets. By aggregating dispersed information about the strength of the global economy among goods producers whose production has complementarity, commodity prices serve as price signals to guide producers' production decisions and commodity demand. Our model highlights important feedback effects of informational noise originating from supply shocks and futures market trading on commodity demand and spot prices. Our analysis illustrates the weakness common in empirical studies on commodity markets of assuming that different types of shocks are publicly observable to market participants.

Rollover Risk and Credit Risk

Published: 03/27/2012   |   DOI: 10.1111/j.1540-6261.2012.01721.x

ZHIGUO HE, WEI XIONG

Our model shows that deterioration in debt market liquidity leads to an increase in not only the liquidity premium of corporate bonds but also credit risk. The latter effect originates from firms' debt rollover. When liquidity deterioration causes a firm to suffer losses in rolling over its maturing debt, equity holders bear the losses while maturing debt holders are paid in full. This conflict leads the firm to default at a higher fundamental threshold. Our model demonstrates an intricate interaction between the liquidity premium and default premium and highlights the role of short‐term debt in exacerbating rollover risk.

What Drives the Disposition Effect? An Analysis of a Long‐Standing Preference‐Based Explanation

Published: 03/13/2009   |   DOI: 10.1111/j.1540-6261.2009.01448.x

NICHOLAS BARBERIS, WEI XIONG

We investigate whether prospect theory preferences can predict a disposition effect. We consider two implementations of prospect theory: in one case, preferences are defined over annual gains and losses; in the other, they are defined over realized gains and losses. Surprisingly, the annual gain/loss model often fails to predict a disposition effect. The realized gain/loss model, however, predicts a disposition effect more reliably. Utility from realized gains and losses may therefore be a useful way of thinking about certain aspects of individual investor trading.

Decentralization through Tokenization

Published: 11/23/2022   |   DOI: 10.1111/jofi.13192

MICHAEL SOCKIN, WEI XIONG

We examine decentralization of digital platforms through tokenization as an innovation to resolve the conflict between platforms and users. By delegating control to users, tokenization through utility tokens acts as a commitment device that prevents a platform from exploiting users. This commitment comes at the cost of not having an owner with an equity stake who, in conventional platforms, would subsidize participation to maximize the platform's network effect. This trade‐off makes utility tokens a more appealing funding scheme than equity for platforms with weak fundamentals. The conflict reappears when nonusers, such as token investors and validators, participate on the platform.

Contagion as a Wealth Effect

Published: 12/17/2002   |   DOI: 10.1111/0022-1082.00373

Albert S. Kyle, Wei Xiong

Financial contagion is described as a wealth effect in a continuous‐time model with two risky assets and three types of traders. Noise traders trade randomly in one market. Long‐term investors provide liquidity using a linear rule based on fundamentals. Convergence traders with logarithmic utility trade optimally in both markets. Asset price dynamics are endogenously determined (numerically) as functions of endogenous wealth and exogenous noise. When convergence traders lose money, they liquidate positions in both markets. This creates contagion, in that returns become more volatile and more correlated. Contagion reduces benefits from portfolio diversification and raises issues for risk management.

Asset Float and Speculative Bubbles

Published: 05/16/2006   |   DOI: 10.1111/j.1540-6261.2006.00867.x

HARRISON HONG, JOSÉ SCHEINKMAN, WEI XIONG

We model the relationship between asset float (tradeable shares) and speculative bubbles. Investors with heterogeneous beliefs and short‐sales constraints trade a stock with limited float because of insider lockups. A bubble arises as price overweighs optimists' beliefs and investors anticipate the option to resell to those with even higher valuations. The bubble's size depends on float as investors anticipate an increase in float with lockup expirations and speculate over the degree of insider selling. Consistent with the internet experience, the bubble, turnover, and volatility decrease with float and prices drop on the lockup expiration date.