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Collateral Shortages, Asset Price and Investment Volatility with Heterogeneous Beliefs

The recent economic crisis highlights the role of financial markets in allowing economic agents, including prominent banks, to speculate on the future returns of different financial assets, such as mortgage-backed securities. This paper in troduces a dynamic general equilibrium model with aggregate shocks, potentially incomplete markets and heterogeneous agents to investigate this role of financial markets. In addition to their risk aversion and endowments, agents differ in their beliefs about the future exogenous states (aggregate and idiosyncratic) of the economy. This difference in beliefs induces them to take large bets under frictionless complete financial markets, which enable agents to leverage their future wealth. Consequently, as hypothesized by Friedman (1953), under complete markets, agents with incorrect beliefs will eventually be driven out of the markets. In this case, they also have no influence on asset prices and real investment in the long run. In contrast, I show that under incomplete markets generated by collateral constraints, agents with heterogeneous (potentially incorrect) beliefs survive in the long run and their speculative activities permanently drive up asset price volatility and real investment volatility. I also show that collateral constraints are always binding even if the supply of collateral assets endogenously responds to their price. I use this framework to study the effects of different types of regulations and the distribution of endowments on leverage, asset price volatility and investment. Lastly, the analytical tools developed in this framework enable me to prove the existence of the "generalized" recursive equilibrium in Krusell and Smith (1998) with a finite number of agents.

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Paper provided by Georgetown University, Department of Economics in its series Working Papers with number gueconwpa~11-11-01.

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Date of creation: 01 Nov 2011
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Handle: RePEc:geo:guwopa:gueconwpa~11-11-01
Contact details of provider: Postal: Georgetown University Department of Economics Washington, DC 20057-1036
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Fax: 202-687-6102
Web page: http://econ.georgetown.edu/
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Order Information: Postal: Roger Lagunoff Professor of Economics Georgetown University Department of Economics Washington, DC 20057-1036
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  1. De Long, J Bradford & Andrei Shleifer & Lawrence H. Summers & Robert J. Waldmann, 1990. "Noise Trader Risk in Financial Markets," Journal of Political Economy, University of Chicago Press, vol. 98(4), pages 703-38, August.
  2. Wei Xiong & Hongjun Yan, 2006. "Heterogeneous Expectations and Bond Markets," NBER Working Papers 12781, National Bureau of Economic Research, Inc.
  3. Beker, Pablo & Chattopadhyay, Subir, 2010. "Consumption dynamics in general equilibrium: A characterisation when markets are incomplete," Journal of Economic Theory, Elsevier, vol. 145(6), pages 2133-2185, November.
  4. Karl Schmedders & Felix Kubler, 2012. "Life-Cycle Portfolio Choice, the Wealth Distribution and Asset Prices," 2012 Meeting Papers 536, Society for Economic Dynamics.
  5. Harrison, J Michael & Kreps, David M, 1978. "Speculative Investor Behavior in a Stock Market with Heterogeneous Expectations," The Quarterly Journal of Economics, MIT Press, vol. 92(2), pages 323-36, May.
  6. Radner, Roy, 1972. "Existence of Equilibrium of Plans, Prices, and Price Expectations in a Sequence of Markets," Econometrica, Econometric Society, vol. 40(2), pages 289-303, March.
  7. Jianjun Miao, 2003. "Competitive Equilibria of Economies with a Continuum of Consumers and Aggregate Shocks," Macroeconomics 0310001, EconWPA.
  8. Fernando Alvarez & Urban J. Jermann, 1999. "Quantitative Asset Pricing Implications of Endogenous Solvency Constraints," NBER Working Papers 6953, National Bureau of Economic Research, Inc.
  9. Tarek Coury & Emanuela Sciubba, 2012. "Belief heterogeneity and survival in incomplete markets," Economic Theory, Springer, vol. 49(1), pages 37-58, January.
  10. Hanno Lustig, 2004. "The Market Price of Aggregate Risk and the Wealth Distribution," UCLA Economics Online Papers 299, UCLA Department of Economics.
  11. Lorenzoni, Guido & Walentin, Karl, 2007. "Financial Frictions, Investment and Tobin’s q," Working Paper Series 208, Sveriges Riksbank (Central Bank of Sweden).
  12. Narayana R. Kocherlakota, 2000. "Creating business cycles through credit constraints," Quarterly Review, Federal Reserve Bank of Minneapolis, issue Sum, pages 2-10.
  13. Per Krusell & Anthony A. Smith, Jr., . "Income and Wealth Heterogeneity in the Macroeconomy," GSIA Working Papers 1997-37, Carnegie Mellon University, Tepper School of Business.
  14. Araújo, Aloísio & Kubler, Felix & Schommer, Susan, 2012. "Regulating collateral-requirements when markets are incomplete," Journal of Economic Theory, Elsevier, vol. 147(2), pages 450-476.
  15. Weerachart Kilenthong, 2011. "Collateral premia and risk sharing under limited commitment," Economic Theory, Springer, vol. 46(3), pages 475-501, April.
  16. Kogan, Leonid & Ross, Stephen & Wang, Jiang & Westerfield, Mark, 2003. "The Price Impact and Survival of Irrational Traders," Working papers 4293-03, Massachusetts Institute of Technology (MIT), Sloan School of Management.
  17. Michael Grill & Karl Schmedders & Felix Kubler & Johannes Brumm, 2011. "Collateral Requirements and Asset Prices," 2011 Meeting Papers 737, Society for Economic Dynamics.
  18. Lucas, Robert E, Jr, 1978. "Asset Prices in an Exchange Economy," Econometrica, Econometric Society, vol. 46(6), pages 1429-45, November.
  19. J. Bradford De Long & Andrei Shleifer & Lawrence H. Summers & Robert J. Waldmann, 1988. "The Survival of Noise Traders in Financial Markets," NBER Working Papers 2715, National Bureau of Economic Research, Inc.
  20. John Geanakoplos & Ana Fostel, 2008. "Leverage Cycles and the Anxious Economy," American Economic Review, American Economic Association, vol. 98(4), pages 1211-44, September.
  21. Felix Kubler & Karl Schmedders, 2001. "Stationary Equilibria in Asset-Pricing Models with Incomplete Markets and Collateral," Discussion Papers 1319, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  22. Kehoe, Timothy J & Levine, David K, 2001. "Liquidity Constrained Markets versus Debt Constrained Markets," Econometrica, Econometric Society, vol. 69(3), pages 575-98, May.
  23. Jose A. Scheinkman & Wei Xiong, 2003. "Overconfidence and Speculative Bubbles," Journal of Political Economy, University of Chicago Press, vol. 111(6), pages 1183-1219, December.
  24. Kilenthong, Weerachart & Townsend, Robert, 2007. "Market Based, Segregated Exchanges with Default Risk," MPRA Paper 20724, University Library of Munich, Germany, revised 12 Nov 2009.
  25. John Geanakoplos, 2009. "The Leverage Cycle," Cowles Foundation Discussion Papers 1715, Cowles Foundation for Research in Economics, Yale University.
  26. Alvaro Sandroni, 2000. "Do Markets Favor Agents Able to Make Accurate Predicitions?," Econometrica, Econometric Society, vol. 68(6), pages 1303-1342, November.
  27. Lucas, Robert E, Jr & Prescott, Edward C, 1971. "Investment Under Uncertainty," Econometrica, Econometric Society, vol. 39(5), pages 659-81, September.
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