Explaining Exchange Rate Volatility With A Genetic Algorithm
Traditional exchange rate models fail to explain stylized facts such as the high volatility or high trading volumes in an adequate way. Contemporary research has therefore increasingly turned to model the foreign exchange market in a more realistic setting, highlighting for instance the high degree of speculative trading caused by different opinions about the future exchange rate. In this paper, we choose a direct empirical microfoundation to model the interactions between heterogenous agents. In a first step, we show on the basis of pychological evidence that agents rely on strong simplifications for decision making purposes and adjust these decisions only slightly if the outcome is not satisfying. In a second step, we identify technical and fundamental trading rules as the most important investment strategies for the foreign exchange market. Consequently, we construct a model where heterogeneous boundedly rational market participants rely on a mix of technical and fundamental trading rules. The rules are applied according to a weighting scheme. Traders evaluate and update their mix of rules by a genetic algorithm. Simulations of the resulting nonlinear dynamic system produce equilibrium exchange rates that appear to circle around some fundamental value without any apparent tendency to converge, thus replicating the stylized fact of high volatility. The dynamics exhibit a complex behavior, and for some values of the coefficients the model even behaves chaotically. Finally, we enrich the dynamics by allowing for stochastic disturbances. Already for a small shock probability the simulated exchange rate fluctuations mimic very closely what is observed empirically. For instance, we find features such as volatility clusters or a fat tail distribution of returns.
|Date of creation:||05 Jul 2000|
|Date of revision:|
|Contact details of provider:|| Postal: |
Fax: +34 93 542 17 46
Web page: http://enginy.upf.es/SCE/
More information through EDIRC
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Benoit Mandelbrot, 1963. "The Variation of Certain Speculative Prices," The Journal of Business, University of Chicago Press, vol. 36, pages 394.
- Taylor, Mark P. & Allen, Helen, 1992. "The use of technical analysis in the foreign exchange market," Journal of International Money and Finance, Elsevier, vol. 11(3), pages 304-314, June.
- J. Doyne Farmer, 1999. "Physicists Attempt to Scale the Ivory Towers of Finance," Working Papers 99-10-073, Santa Fe Institute.
- Heiner, Ronald A, 1983. "The Origin of Predictable Behavior," American Economic Review, American Economic Association, vol. 73(4), pages 560-95, September.
- Dutton, Marilyn & Strauss, Jack, 1997. "Cointegration tests of purchasing power parity: the impact of non-traded goods," Journal of International Money and Finance, Elsevier, vol. 16(3), pages 433-444, June.
- Christopher J. Neely, 1997. "Technical analysis in the foreign exchange market: a layman's guide," Review, Federal Reserve Bank of St. Louis, issue Sep, pages 23-38.
- Culter, D.M. & Poterba, J.M. & Summers, L.H., 1990.
"Speculative Dynamics And The Role Of Feedback Traders,"
545, Massachusetts Institute of Technology (MIT), Department of Economics.
- Cutler, David M & Poterba, James M & Summers, Lawrence H, 1990. "Speculative Dynamics and the Role of Feedback Traders," American Economic Review, American Economic Association, vol. 80(2), pages 63-68, May.
- David M. Cutler & James M. Poterba & Lawrence H. Summers, 1990. "Speculative Dynamics and the Role of Feedback Traders," NBER Working Papers 3243, National Bureau of Economic Research, Inc.
- Goodhart, Charles, 1988. "The Foreign Exchange Market: A Random Walk with a Dragging Anchor," Economica, London School of Economics and Political Science, vol. 55(220), pages 437-60, November.
- Goodhart, Charles A. E. & McMahon, Patrick C. & Ngama, Yerima L., 1993. "Testing for unit roots with very high frequency spot exchange rate data," Journal of Macroeconomics, Elsevier, vol. 15(3), pages 423-438.
- Richard B. Olsen & Ulrich A. Müller & Michel M. Dacorogna & Olivier V. Pictet & Rakhal R. Davé & Dominique M. Guillaume, 1997. "From the bird's eye to the microscope: A survey of new stylized facts of the intra-daily foreign exchange markets (*)," Finance and Stochastics, Springer, vol. 1(2), pages 95-129.
- Kirman, Alan, 1993. "Ants, Rationality, and Recruitment," The Quarterly Journal of Economics, MIT Press, vol. 108(1), pages 137-56, February.
- LeBaron, Blake, 2000. "Agent-based computational finance: Suggested readings and early research," Journal of Economic Dynamics and Control, Elsevier, vol. 24(5-7), pages 679-702, June.
- Engle, Robert F & Granger, Clive W J, 1987. "Co-integration and Error Correction: Representation, Estimation, and Testing," Econometrica, Econometric Society, vol. 55(2), pages 251-76, March.
- Frankel, Jeffrey A & Froot, Kenneth A, 1986. "Understanding the U.S. Dollar in the Eighties: The Expectations of Chartists and Fundamentalists," The Economic Record, The Economic Society of Australia, vol. 0(0), pages 24-38, Supplemen.
When requesting a correction, please mention this item's handle: RePEc:sce:scecf0:325. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Christopher F. Baum)
If references are entirely missing, you can add them using this form.