I put the following graphic together to show you the impact that August 2011 is having on the history of the S&P 500 Index. It’s pretty interesting.
The second column shows the average, median, standard deviation, and geometric average for ALL August months through 2010. The third column shows the same stats for ALL August months through August 19, 2011. The fourth column shows the difference between the other two columns. Pretty significant difference.
Of course, there is still a week left in August and these numbers could change dramatically. We shall see.