September is just around the corner and it has a reputation as the markets worst month. With this in mind, we had a theory. Would it be even more inclined to drop if August, another poor month, had rallied? We found that in the years 1993, 1994, 2000 and 2002, this is exactly what happened. The years 1995, 1997 and 1998 had a down August and an up September. The year 1996 saw both months up. The years 1999, and 2001 saw both August and September down. In summary, only one year out of ten had both months up and only four years saw an up September. This, we might add, was in the midst of the greatest bull market in history. We might also add that according to the Stock Traders Almanac, September is the only month since 1950 to be down more often than up. That same publication states that September tends to rally in the early part of the month and then give it up later.