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Report
Broker-dealer risk appetite and commodity returns
This paper shows that the risk-bearing capacity of U.S. securities brokers and dealers is a strong determinant of risk premia in commodity derivatives markets. Commodity derivatives are the principal instrument used by producers and purchasers of commodities to hedge against commodity price risk. Broker-dealers play an important role in this hedging process because commodity derivatives are traded primarily over the counter. I capture the limits of arbitrage in this market in a simple asset pricing model where producers and purchasers of commodities share risk with broker-dealers who are ...
Working Paper
Asymptotic variance approximations for invariant estimators in uncertain asset-pricing models
This paper derives explicit expressions for the asymptotic variances of the maximum likelihood and continuously updated GMM estimators under potentially misspecified models. The proposed misspecification-robust variance estimators allow the researcher to conduct valid inference on the model parameters even when the model is rejected by the data. Although the results for the maximum likelihood estimator are only applicable to linear asset-pricing models, the asymptotic distribution of the continuously updated GMM estimator is derived for general, possibly nonlinear, models. The large ...
Working Paper
Implications of heterogeneity in preferences, beliefs and asset trading technologies for the macroeconomy
This paper analyzes and computes the equilibria of economies with large numbers of heterogeneous agents who have different asset trading technologies, preferences, and beliefs. We illustrate the value of our method by using it to evaluate the implications of these heterogeneities through several quantitative exercises.
Working Paper
Bubbles and Leverage: A Simple and Unified Approach
In this paper, we lay out a simple framework that captures much of what the theoretical literature has to say about the role of credit in systemically important asset booms and busts. In addition, we suggest ways in which to incorporate physical investment in the bubble asset as well as monetary policy.
Discussion Paper
When Do Trade Frictions Increase Liquidity?
Economists tend to assume that frictions that limit trading in financial markets reduce liquidity and lower investor welfare. In this blog I discuss a recent staff study of mine that challenges that conventional wisdom. I explain how introducing trading frictions—such as circuit breakers—that slow or halt trading in an over-the-counter market experiencing a fire sale might, paradoxically, lead to higher liquidity and investor welfare.
Working Paper
General Aggregation of Misspecified Asset Pricing Models
This paper proposes an entropy-based approach for aggregating information from misspecified asset pricing models. The statistical paradigm is shifted away from parameter estimation of an optimally selected model to stochastic optimization based on a risk function of aggregation across models. The proposed method relaxes the perfect substitutability of the candidate models, which is implicitly embedded in the linear pooling procedures, and ensures that the aggregation weights are selected with a proper (Hellinger) distance measure that satisfies the triangle inequality. The empirical results ...
Report
Nonparametric pricing of multivariate contingent claims
In this paper, I derive and implement a nonparametric, arbitrage-free technique for multivariate contingent claim (MVCC) pricing. Using results from the method of copulas, I show that the multivariate risk-neutral density can be written as a product of marginal risk-neutral densities and a risk-neutral dependence function. I then develop a pricing technique using nonparametrically estimated marginal risk-neutral densities (based on options data) and a nonparametric dependence function (based on historical return data). By using nonparametric estimation, I avoid the pricing biases that result ...
Newsletter
The impact of the pandemic and the Fed’s muni program on Illinois muni yields
We estimate a simple model in which variations in Illinois daily municipal bond yields are explained by high-frequency indicators summarizing economic and public health conditions in Illinois, as well as key changes in the Federal Reserve’s Municipal Liquidity Facility (or MLF). We find that the MLF appears to have reduced Illinois muni yields by more than 200 basis points.
Working Paper
What we learn from China's rising shadow banking: exploring the nexus of monetary tightening and banks' role in entrusted lending
We argue that China's rising shadow banking was inextricably linked to potential balance-sheet risks in the banking system. We substantiate this argument with three didactic findings: (1) commercial banks in general were prone to engage in channeling risky entrusted loans; (2) shadow banking through entrusted lending masked small banks' exposure to balance-sheet risks; and (3) two well-intended regulations and institutional asymmetry between large and small banks combined to give small banks an incentive to exploit regulatory arbitrage by bringing off-balance-sheet risks into the balance ...
Working Paper
Liquidity Premia, Price-Rent Dynamics, and Business Cycles
n the U.S. economy during the past 25 years, house prices exhibit fluctuations considerably larger than house rents, and these large fluctuations tend to move together with business cycles. We build a simple theoretical model to characterize these observations by showing the tight connection between price-rent fluctuation and the liquidity constraint faced by productive firms. After developing economic intuition for this result, we estimate a medium-scale dynamic general equilibrium model to assess the empirical importance of the role the price-rent fluctuation plays in the business cycle. ...