Second, at least 5 percent of the volume of sales to the allegedly targeted group must be at prices that are lower than the average price of the lowest-priced non-targeted group by a margin (a gap) that is greater than the averagegap between the average prices of all the non-targeted groups.
By his count, on average the gap between where stock prices began and where Applied Finance figured they should be shrank 15% to 30% a year from 1998 to 2005.