Volatility in the Italian Stock Market: an Empirical Study
AbstractWe study the volatility of the MIB30-stock-index high-frequency data from November 28, 1994 through September 15, 1995. Our aim is to empirically characterize the volatility random walk in the framework of continuous-time finance. To this end, we compute the index volatility by means of the log-return standard deviation. We choose an hourly time window in order to investigate intraday properties of volatility. A periodic component is found for the hourly time window, in agreement with previous observations. Fluctuations are studied by means of detrended fluctuation analysis, and we detect long-range correlations. Volatility values are log-stable distributed. We discuss the implications of these results for stochastic volatility modelling.
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Bibliographic InfoPaper provided by arXiv.org in its series Papers with number cond-mat/9903221.
Date of creation: Mar 1999
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Publication status: Published in Physica A 269, 148-155 (1999)
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Web page: http://arxiv.org/
Other versions of this item:
- Raberto, Marco & Scalas, Enrico & Cuniberti, Gianaurelio & Riani, Massimo, 1999. "Volatility in the Italian stock market: an empirical study," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 269(1), pages 148-155.
- Marco Raberto & Enrico Scalas & Gianaurelio Cuniberti & Massimo Riani, 2004. "Volatility in the Italian Stock Market: An Empirical Study," Finance 0411006, EconWPA.
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