On the Role of Arbitrageurs in Rational Markets
Price discrepancies, although at odds with mainstream finance, are persistent phenomena in financial markets. These apparent mispricings lead to the presence of ‘arbitrageurs’, who aim to exploit the resulting profit opportunities, but whose role remains controversial. This article investigates the impact of the presence of arbitrageurs in rational financial markets. Arbitrage opportunities between redundant risky assets arise endogenously in an economy populated by rational, heterogeneous investors facing restrictions on leverage and short sales. An arbitrageur, indulging in costless, riskless arbitrage is shown to alleviate the effects of these restrictions and improve the transfer of risk amongst investors. When the arbitrageur lacks market power, they always take on the largest arbitrage position possible. When the arbitrageur behaves noncompetitively, in that they take into account the price impact of their trades, they optimally limit the size of their positions due to decreasing marginal profits. In the case when the arbitrageur is subject to margin requirements and is endowed with capital from outside investors, the size of the arbitrageur’s trades and the capital needed to implement these trades are endogenously solved for in equilibrium.
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- Piazzesi, Monika & Swanson, Eric T., 2008.
"Futures prices as risk-adjusted forecasts of monetary policy,"
Journal of Monetary Economics,
Elsevier, vol. 55(4), pages 677-691, May.
- Monika Piazzesi & Eric T. Swanson, 2004. "Future prices as risk-adjusted forecasts of monetary policy," Proceedings, Federal Reserve Bank of San Francisco, issue Mar, pages -.
- Monika Piazzesi & Eric Swanson, 2004. "Futures Prices as Risk-adjusted Forecasts of Monetary Policy," NBER Working Papers 10547, National Bureau of Economic Research, Inc.
- Monika Piazzesi & Eric T. Swanson, 2006. "Futures prices as risk-adjusted forecasts of monetary policy," Working Paper Series 2006-23, Federal Reserve Bank of San Francisco.
- J. Michael Harrison & David M. Kreps, 1978. "Speculative Investor Behavior in a Stock Market with Heterogeneous Expectations," The Quarterly Journal of Economics, Oxford University Press, vol. 92(2), pages 323-336.
- Albert S. Kyle, 2001. "Contagion as a Wealth Effect," Journal of Finance, American Finance Association, vol. 56(4), pages 1401-1440, 08.
- Domenico Cuoco & Hong Liu, 2000. "A Martingale Characterization of Consumption Choices and Hedging Costs with Margin Requirements," Mathematical Finance, Wiley Blackwell, vol. 10(3), pages 355-385.
- Basak, Suleyman & Croitoru, Benjamin, 2000.
"Equilibrium Mispricing in a Capital Market with Portfolio Constraints,"
Review of Financial Studies,
Society for Financial Studies, vol. 13(3), pages 715-748.
- Suleyman Basak & Benjamin Croitoru, . "Equilibrium Mispricing in a Capital Market with Portfolio Constraints," Rodney L. White Center for Financial Research Working Papers 17-99, Wharton School Rodney L. White Center for Financial Research.
- Owen A. Lamont & Richard H. Thaler, 2001.
"Can the Market Add and Subtract? Mispricing in Tech Stock Carve-Outs,"
NBER Working Papers
8302, National Bureau of Economic Research, Inc.
- Owen A. Lamont & Richard H. Thaler, 2003. "Can the Market Add and Subtract? Mispricing in Tech Stock Carve-outs," Journal of Political Economy, University of Chicago Press, vol. 111(2), pages 227-268, April.
- Owen A. Lamont & Richard H. Thaler, "undated". "Can the Market Add and Subtract? Mispricing in Tech Stock Carve-outs," CRSP working papers 528, Center for Research in Security Prices, Graduate School of Business, University of Chicago.
- Brennan, Michael J & Schwartz, Eduardo S, 1990. "Arbitrage in Stock Index Futures," The Journal of Business, University of Chicago Press, vol. 63(1), pages 7-31, January.
- 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 703-738, August.
- De Long, J. Bradford & Shleifer, Andrei & Summers, Lawrence H. & Waldmann, Robert J., 1990. "Noise Trader Risk in Financial Markets," Scholarly Articles 3725552, Harvard University Department of Economics.
- J. Bradford De Long & Andrei Shleifer & Lawrence H. Summers & Robert J. Waldmann, "undated". "Noise Trader Risk in Financial Markets," J. Bradford De Long's Working Papers _124, University of California at Berkeley, Economics Department.
- Duffie, Darrell & Garleanu, Nicolae & Pedersen, Lasse Heje, 2002. "Securities lending, shorting, and pricing," Journal of Financial Economics, Elsevier, vol. 66(2-3), pages 307-339.
- Mark Mitchell & Todd Pulvino & Erik Stafford, 2002. "Limited Arbitrage in Equity Markets," Journal of Finance, American Finance Association, vol. 57(2), pages 551-584, 04.
- Lucas, Robert E, Jr, 1978. "Asset Prices in an Exchange Economy," Econometrica, Econometric Society, vol. 46(6), pages 1429-1445, November.
- Cox, John C & Ingersoll, Jonathan E, Jr & Ross, Stephen A, 1985. "An Intertemporal General Equilibrium Model of Asset Prices," Econometrica, Econometric Society, vol. 53(2), pages 363-384, March.
- Gromb, Denis & Vayanos, Dimitri, 2001.
"Equilibrium and Welfare in Markets with Financially Constrained Arbitrageurs,"
CEPR Discussion Papers
3049, C.E.P.R. Discussion Papers.
- Gromb, Denis & Vayanos, Dimitri, 2002. "Equilibrium and welfare in markets with financially constrained arbitrageurs," Journal of Financial Economics, Elsevier, vol. 66(2-3), pages 361-407.
- Denis Gromb & Dimitri Vayanos, 2002. "Equilibrium and welfare in markets with financially constrained arbitrageurs," LSE Research Online Documents on Economics 448, London School of Economics and Political Science, LSE Library.
- Jérôme B. Detemple & Shashidhar Murthy, 1997. "Equilibrium Asset Prices and No-Arbitrage with Portfolio Constraints," CIRANO Working Papers 97s-12, CIRANO.
- Ofek, Eli & Richardson, Matthew & Whitelaw, Robert F., 2004. "Limited arbitrage and short sales restrictions: evidence from the options markets," Journal of Financial Economics, Elsevier, vol. 74(2), pages 305-342, November.
- Detemple Jerome & Murthy Shashidhar, 1994. "Intertemporal Asset Pricing with Heterogeneous Beliefs," Journal of Economic Theory, Elsevier, vol. 62(2), pages 294-320, April.
- Louis Ederington & Jae Ha Lee, 2002. "Who Trades Futures and How: Evidence from the Heating Oil Futures Market," The Journal of Business, University of Chicago Press, vol. 75(2), pages 353-374, April.
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