Referred to as the "volatility of volatility", kurtosis gauges the level of fluctuation within a distribution. High levels of kurtosis represent a low level of data fluctuation, as the observations cluster about the mean. Lower values of kurtosis mean that data has a larger degree of variance.
For example, when looking at past stock returns, analysts will want to determine the likelihood of extreme returns (or losses) in the future. If past stock data results in a platykurtic distribution, analysts will expect more volatility in future returns. This means that there is a higher probability than usual for extreme price movements to occur.
Investment dictionary. Academic. 2012.
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platykurtic — /plat i kerr tik/, adj. Statistics. 1. (of a frequency distribution) less concentrated about the mean than the corresponding normal distribution. 2. (of a frequency distribution curve) having a wide, rather flat distribution about the mode. [1900 … Universalium
platykurtic — adjective said of a distribution if it has negative kurtosis Syn: platykurtotic Ant: leptokurtic See Also: kurtosis, platykurtosis … Wiktionary
platykurtic — platy·kur·tic (plat″ĭ kurґtik) [platy + Gr. kurtos convex] pertaining to a probability distribution less concentrated about the mean, i.e., having a broader, flatter peak than the normal distribution with the same variance. Cf.… … Medical dictionary
platykurtic — platy·kur·tic … English syllables
platykurtic — | ̷ ̷ ̷ ̷|kərd.ik adjective Etymology: platy + kurt (from Greek kyrtos bulging, curved) + ic more at leptokurtic 1. of a frequency distribution curve : being less peaked than the corresponding normal distribution curve 2. of a frequency… … Useful english dictionary
Kurtosis — In probability theory and statistics, kurtosis (from the Greek word κυρτός, kyrtos or kurtos, meaning bulging) is any measure of the peakedness of the probability distribution of a real valued random variable. In a similar way to the concept… … Wikipedia
platykurtosis — | ̷ ̷ ̷ ̷+ noun Etymology: New Latin, from English platykurtic + New Latin osis : the condition of being platykurtic * * * /plat ee kerr toh sis/, n. Statistics. the state of being platykurtic. [1935 40; PLATYKURT(IC) + OSIS] … Useful english dictionary
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Frequency distribution — In statistics, a frequency distribution is an arrangement of the values that one or more variables take in a sample. Each entry in the table contains the frequency or count of the occurrences of values within a particular group or interval, and… … Wikipedia