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Working Paper
Collateral Reuse and Financial Stability
The isolated effects of collateral reuse on financial stability are ambiguous and understudied. While greater collateral reuse can guarantee more payments with fewer assets, it can also increase the exposure to potential drops in collateral price. To analyze these tradeoffs, we develop a financial network model with endogenous asset pricing, multiple equilibria, and equilibrium selection. We find that more collateral reuse decreases the likelihood of the worst equilibrium (crisis), with varying effects depending on the network structure. Therefore, collateral reuse can unambiguously improve ...
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
Safe Collateral, Arm's-Length Credit : Evidence from the Commercial Real Estate Mortgage Market
When collateral is safe, there are less opportunities for things to go wrong. We examine matching between collateral and creditors in the commercial real estate mortgage market by comparing loans in commercial mortgage backed securities (CMBS) conduits and bank portfolios. We model CMBS financing as lower cost but less informed, such that only safe collateral is funded by CMBS. This prediction is tested using the 2007-2009 shutdown of the CMBS market as a natural experiment. The loans funded by banks that would have been securitized are less likely to default or be renegotiated, indicating ...
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
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
Transparency and Collateral: The Design of CCPs' Loss Allocation Rules
This paper adopts a mechanism design approach to study optimal clearing arrangements for bilateral financial contracts in which an assessment of counterparty risk is crucial for efficiency. The economy is populated by two types of agents: a borrower and lender. The borrower is subject to limited commitment and holds private information about the severity of such lack of commitment. The lender can acquire information at a cost about the commitment of the borrower, which affects the assessment of counterparty risk. When truthful revelation by the borrower is not incentive compatible, the ...
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 ...
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
What Drives U.S. Treasury Re-use?
We study what drives the re-use of U.S. Treasury securities in the financial system. Using confidential supervisory data, we estimate the degree of collateral re-use at the dealer level through their collateral multiplier : the ratio between a dealer's secured funding and their outright holdings. We find that Treasury re-use increases as the supply of available securities decreases, especially when supply declines due to Federal Reserve asset purchases. We also find that non-U.S. dealers' re-use increases when profits from intermediating cash are high, U.S. dealers' re-use increases when ...