Bull run in trouble? I don't think so, at least not as long as SPX is above its 50 D-SMA. A solid close below 50 D-SMA would be very negative.
The rolling one year return, which is looked at by investors, is going to get better and better for all indices, nearly all stocks and mutual funds between now and early March 2010. For example, if SPX remains flat between now and early March 2010, its one year performance would still increase by 25%. This phenomena will cause more and more investors who are sitting on the side line to come in and buy the dips, specially as we close October and enter into a seasonably strong period of the year.