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kurtosis
(redirected from Excess kurtosis)

   Also found in: Financial, Wikipedia 0.02 sec.
kurtosis
[kerto′sis]
the degree of peakedness or flatness of a probability distribution relative to the normal distribution with the same variance.

kurtosis
the quality of peakedness in a unimodal distribution. Abnormalities are leptokurtosis where values are clustered about the mean and the tails of the curve, and platykurtosis where the clustering produces a plateau-shaped curve.


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? Mentioned in ? References in periodicals archive
 
As Table 3 shows, the SP500 distribution exhibits excess kurtosis, which is a common characteristic of stock return distributions.
In all cases the Jarque-Bera test for normality are highly significant with excess kurtosis and negatively skewed.
The high value of excess kurtosis reported in table 3 implies that the market is likely to be affected by big surprises, conditional on the information available at any point in time.
 
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