People have more vivid memories of the colorful, Super Bowl Shuffling 1985 Bears (also 15-1 with a second-best all time standard deviation of 2.10), because that club was a one-year wonder that never got back to a Super Bowl.
First, at least 33 percent by volume of the sales to an allegedly targeted group must be at prices that are less than one standard deviation below the average price to all other groups.
The Calculation: To quantify the data, I measured each of those four statistics (YTD return, number of up days, standard deviation, and maximum drawdown) against all other stocks and gave them a score from zero to 100.
To make all the curves comparable, he expressed the values of the actual deviations as fractions of a standard deviation, and their frequencies as proportions of their total number.