|T -- USA Stock|| |
USD 33.09 0.62 1.91%
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ATT has current Mean Deviation of 1.03. The mean deviation of equity instrument is the first measure of the distances between each value of security historical prices and the mean. It gives us an idea of how spread out from the center the destribution of returns.
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|SUM|| = || Summation notation|
|RET DEV|| = || Sum of return deviations of ATT|
|N|| = || Number of calculation points for selected time horizon|
Mean Deviation Comparison
ATT is rated below average
in mean deviation category among related companies. It is rated fifth
in maximum drawdown category among related companies reporting about 6.53
of Maximum Drawdown per Mean Deviation. The ratio of Maximum Drawdown to Mean Deviation for ATT is roughly 6.53
Mean Deviation is the average of the absolute values of the differences between price distribution numbers and their mean. Mean deviation of equity instrument with a lot of historical data is a biased estimator because the time horizon used in calculation will always be much smaller than the entire price history of the equity. The mean deviation is typically used as a measure of dispersion for small investment horizon, otherwise standard deviation is a better measure of dispersion.