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Working Paper
Interest Rate Dynamics, Variable-Rate Loan Contracts, and the Business Cycle
The interest rate at which US firms borrow funds has two features: (i) it moves in a countercyclical fashion and (ii) it is an inverted leading indicator of real economic activity: low interest rates forecast booms in GDP, consumption, investment, and employment. We show that a Kiyotaki-Moore model accounts for both properties when business-cycle movements are driven, in a significant way, by animal spirit shocks to credit-financed investment demand. The credit-based nature of such self-fulfilling equilibria is shown to be essential: the dynamic correlation between current loanable funds rate ...
Working Paper
Collateralized Debt Networks with Lender Default
The Lehman Brothers' 2008 bankruptcy spread losses to its counterparties even when Lehman was a lender of cash, because collateral for that lending was tied up in the bankruptcy process. I study the implications of such lender default using a general equilibrium network model featuring endogenous leverage, endogenous asset prices, and endogenous network formation. The multiplex graph model has two channels of contagion: a counterparty channel of contagion and a price channel of contagion through endogenous collateral price. Borrowers diversify their lenders because of the counterparty risk, ...
Working Paper
Contagion in Debt and Collateral Markets
This paper investigates contagion in financial networks through both debt and collateral markets. We find that the role of collateral is mitigating counterparty exposures and reducing contagion but has a phase transition property. Contagion can change dramatically depending on the amount of collateral relative to the debt exposures. When there is an abundance of collateral (leverage is low), then collateral can fully cover debt exposures, and the network structure does not matter. When there is an adequate amount of collateral (leverage is moderate), then collateral can mitigate counterparty ...
Working Paper
The (Unintended?) Consequences of the Largest Liquidity Injection Ever
The design of lender-of-last-resort interventions can exacerbate the bank-sovereign nexus. During sovereign crises, central bank provision of long-term liquidity incentivizes banks to purchase high yield eligible collateral securities matching the maturity of the central bank loans. Using unique security level data, we find that the European Central Bank's 3-year Long-Term Refinancing Operation caused Portuguese banks to purchase short-term domestic government bonds, equivalent to 10.6% of amounts outstanding, and pledge them to obtain central bank liquidity. The steepening of Eurozone ...
Working Paper
Emergency Collateral Upgrades
During the 2008-09 financial crisis, the Federal Reserve established two emergency facilities for broker-dealers. One provided collateralized loans. The other lent securities against a pledge of other securities, effectively providing collateral upgrades, an operation similar to activities traditionally undertaken by broker-dealers. We find that these facilities alleviated dealers' funding pressures when access to repos backed by illiquid collateral deteriorated. We also find that dealers used the facilities, especially the ability to upgrade collateral, to continue funding their own illiquid ...
Working Paper
Transparency and Collateral : Central versus Bilateral Clearing
Bilateral financial contracts typically require an assessment of counterparty risk. Central clearing of these financial contracts allows market participants to mutualize their counterparty risk, but this insurance may weaken incentives to acquire and to reveal information about such risk. When considering this trade-off, participants would choose central clearing if information acquisition is incentive compatible. If it is not, they may prefer bilateral clearing, when this choice prevents strategic default while economizing on costly collateral. In either case, participants independently ...
Working Paper
On Default and Uniqueness of Monetary Equilibria
We examine the role that credit risk in the central bank's monetary operations plays in the determination of the equilibrium price level and allocations. Our model features trade in fiat money, real assets and a monetary authority which injects money into the economy through short-term and long-term loans to agents. Short-term loans are riskless, but long-term loans are collateralized by a portfolio of real assets and are subject to credit risk. The private monetary wealth of individuals is zero, i.e., there is no outside money. When there is no default in equilibrium, there is indeterminacy. ...
Working Paper
A Model of Endogenous Debt Maturity with Heterogeneous Beliefs
This paper studies optimal debt maturity in an economy with repayment enforcement frictions and investors disagree about repayment probabilities. The optimal debt maturity choice is a mix of long- and short-term debt securities. Spreading risky debt claims on cash flows over time allows debt to be priced by investors most willing to hold risk at each point in time, thereby increasing investment and output. By contrast, a single maturity, either all long- or short-term, will be priced by investors less willing to hold risk, which reduces investment and output. The model provides a novel ...
Working Paper
The Scarcity Value of Treasury Collateral: Repo Market Effects of Security-Specific Supply and Demand Factors
In the repo market, forward agreements are security-specific (i.e., there are no deliverable substitutes), which makes it an ideal place to measure the value of fluctuations in a security's available supply. In this study, we quantify the scarcity value of Treasury collateral by estimating the impact of security-specific demand and supply factors on the repo rates of all the outstanding U.S. Treasury securities. Our results indicate the existence of an economically and statistically significant scarcity premium, especially for shorter-term securities. The estimated scarcity effect is quite ...
Working Paper
Collateral Runs
This paper models an unexplored source of liquidity risk faced by large broker-dealers: collateral runs. By setting different contracting terms on repurchase agreements with cash borrowers and lenders, dealers can source funds for their own activities. Cash borrowers internalize the risk of losing their collateral in case their dealer defaults, prompting them to withdraw it. This incentive creates strategic complementarities for counterparties to withdraw their collateral, reducing a dealer's liquidity position and compromising her solvency. Collateral runs are markedly different than ...