S&P 500 October Pace

The S&P 500 is up another 1.61% today, which means that for October the index is now up 7.32%.  We are in the 8th trading day of a month that contains 21, so if the S&P continues on this pace we will be up about 20% at month end.  Needless to say, this seems pretty unlikely.  That could be a sign that this rally is getting a bit long in the tooth in the near term.