JUUSO TÖYLI , KIMMO KASKI and ANTTI KANTO Variability of Hex Return Distribution
نویسنده
چکیده
This paper discusses the shape of the stock return distribution using the all shares index of Helsinki Stock Exchange. Non-parametric kernel density estimation and power exponential family of distributions are used to model the shape of the return distribution. The parameters of power exponential distribution are estimated with Bayesian approach. The findings suggest that the shape of the distribution does not vary from one weekday to another. However, substantial deviations over time are observed while there are also temporal periods when it is reasonable to assume the return generating process as normal. Furthermore, the results indicate that the return distribution approaches normal when the time interval used to calculate returns is increased.
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