Multiplicity and Sunspots in General Financial Equilibrium with Portfolio Constraints
This paper explores the role of portfolio constraints in generating multiplicity of equilibrium. We present a simple asset market economy with two goods and two households, households who face constraints on their ability to take unbounded positions in risky stocks. Absent such constraints, equilibrium allocation is unique and is Pareto efficient. With a single portfolio constraint in place, the efficient equilibrium is still possible; however, additional inefficient equilibria in which the constraint is binding may emerge. We show further that with sunspots, there may be a continuum of equilibria; sunspots may lead to real indeterminacy. Extending our analysis of sunspot phenomena to three periods, we show that our model is also capable of generating moves in stock prices unrelated to so-called fundamentals; such movements are triggered purely by sunspots which only affect investors'(rational) expectations about future market behavior. This provides a simple, coherent explanation for the apparent inability of empirical studies to link many sharp price movements in stock markets to news about economic fundamentals.
|Date of creation:||01 Jun 2006|
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- Lucas, Robert E, Jr, 1978. "Asset Prices in an Exchange Economy," Econometrica, Econometric Society, vol. 46(6), pages 1429-45, November.
- David Cass & Anna Pavlova, .
"On Trees and Logs,"
CARESS Working Papres
00-01, University of Pennsylvania Center for Analytic Research and Economics in the Social Sciences.
- Cass, David & Pavlova, Anna, 2003. "On Trees And Logs," Working papers 4233-02, Massachusetts Institute of Technology (MIT), Sloan School of Management.
- David Cass & Anna Pavlova, . "On Trees and Logs," Penn CARESS Working Papers e046baf19b9659b668c46a5f9, Penn Economics Department.
- Pavlova, Anna & Cass, David, 2002. "On Trees and Logs," Working papers 4233-02, Massachusetts Institute of Technology (MIT), Sloan School of Management.
- Jérôme Detemple & Angel Serrat, 2003. "Dynamic Equilibrium with Liquidity Constraints," Review of Financial Studies, Society for Financial Studies, vol. 16(2), pages 597-629.
- Cass, David & Siconolfi, Paolo & Villanacci, Antonio, 2001. "Generic regularity of competitive equilibria with restricted participation," Journal of Mathematical Economics, Elsevier, vol. 36(1), pages 61-76, September.
- Gadi Barlevy & Pietro Veronesi, 2000.
"Rational Panics and Stock Market Crashes,"
CRSP working papers
483, Center for Research in Security Prices, Graduate School of Business, University of Chicago.
- Geanakoplos, J. & Magill, M. & Quinzii, M. & Dreze, J., 1990.
"Generic inefficiency of stock market equilibrium when markets are incomplete,"
Journal of Mathematical Economics,
Elsevier, vol. 19(1-2), pages 113-151.
- John Geanakoplos & Michael Magill & Martine Quinzii & J. Dreze, 1988. "Generic Inefficiency of Stock Market Equilibrium When Markets Are Incomplete," Cowles Foundation Discussion Papers 863, Cowles Foundation for Research in Economics, Yale University.
- Geanakoplos, J. & Magill, M. & Quinzii, M. & Dreze, J., . "Generic inefficiency of stock market equilibrium when markets are incomplete," CORE Discussion Papers RP 916, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
- David M. Cutler & James M. Poterba & Lawrence H. Summers, 1988.
"What Moves Stock Prices?,"
NBER Working Papers
2538, National Bureau of Economic Research, Inc.
- Anna Pavlova & Roberto Rigobon, 2005.
"Wealth Transfers, Contagion, and Portfolio Constraints,"
NBER Working Papers
11440, National Bureau of Economic Research, Inc.
- Pavlova, Anna & Rigobon, Roberto, 2005. "Wealth Transfers, Contagion and Portfolio Constraints," CEPR Discussion Papers 5117, C.E.P.R. Discussion Papers.
- Gennotte, Gerard & Leland, Hayne, 1990.
"Market Liquidity, Hedging, and Crashes,"
American Economic Review,
American Economic Association, vol. 80(5), pages 999-1021, December.
- Gerard Gennotte and Hayne Leland., 1989. "Market Liquidity, Hedging and Crashes," Research Program in Finance Working Papers RPF-184, University of California at Berkeley.
- Gerard Gennotte and Hayne Leland., 1989. "Market Liquidity, Hedging and Crashes," Research Program in Finance Working Papers RPF-192, University of California at Berkeley.
- Basak, Suleyman & Cuoco, Domenico, 1998. "An Equilibrium Model with Restricted Stock Market Participation," Review of Financial Studies, Society for Financial Studies, vol. 11(2), pages 309-41.
- Harrison Hong & Jeremy C. Stein, 2003. "Differences of Opinion, Short-Sales Constraints, and Market Crashes," Review of Financial Studies, Society for Financial Studies, vol. 16(2), pages 487-525.
- Detemple, Jerome & Murthy, Shashidhar, 1997. "Equilibrium Asset Prices and No-Arbitrage with Portfolio Constraints," Review of Financial Studies, Society for Financial Studies, vol. 10(4), pages 1133-74.
- French, Kenneth R. & Roll, Richard, 1986. "Stock return variances : The arrival of information and the reaction of traders," Journal of Financial Economics, Elsevier, vol. 17(1), pages 5-26, September.
- Duffie, Darrell & Shafer, Wayne, 1985. "Equilibrium in incomplete markets: I : A basic model of generic existence," Journal of Mathematical Economics, Elsevier, vol. 14(3), pages 285-300, June.
- Jérôme B. Detemple & Shashidhar Murthy, 1997. "Equilibrium Asset Prices and No-Arbitrage with Portfolio Constraints," CIRANO Working Papers 97s-12, CIRANO.
- Roll, Richard, 1984. "Orange Juice and Weather," American Economic Review, American Economic Association, vol. 74(5), pages 861-80, December.
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