Variety of Stock Returns in Normal and Extreme Market Days: The August 1998 Crisis
We investigate the recently introduced variety of a set of stock returns traded in a financial market. This investigation is done by considering daily and intraday time horizons in a 15-day time period centered at the August 31st, 1998 crash of the S&P500 index. All the stocks traded at the NYSE during that period are considered in the present analysis. We show that the statistical properties of the variety observed in analyses of daily returns also hold for intraday returns. In particular the largest changes of the variety of the return distribution turns out to be most localized at the opening or (to a less degree) at the closing of the market.
KeywordsTime Horizon Financial Market Stock Return Daily Return Price Return
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- 4.Bouchaud J.-P., Potters, M. (2000) Theory of financial risk. Cambridge University Press, Cambridge, UKGoogle Scholar
- 5.Bouchaud, J.-P., Lauritsen, K., Alstrom, P., (eds) (2000b) Proceedings of the International Conference on Application of Physics in Financial Analysis. Int. J. Theor. Appl. Finance 3, 309–608Google Scholar
- 8.Elton, E. J., Gruber, M. J. (1995) Modern Portfolio Theory and Investment Analysis. J. Wiley & Sons, New YorkGoogle Scholar
- 15.Lillo, F., Mantegna, R. N. (2001) Empirical properties of the variety of a financial portfolio and the single-index model, Eur. Phys. J. B. in pressGoogle Scholar
- 20.Mantegna, R. N., (ed) (1999b) Proceedings of the International Workshop on Econophysics and Statistical Finance. Physica A 269, 1–188Google Scholar
- 21.Mantegna, R. N., Stanley, H. E. (2000) An Introduction to Econophysics: Correlations and Complexity in Finance. Cambridge University Press, Cambridge, UKGoogle Scholar