Should we call it hell month for investors? It's too soon to tell. September is filled with looming risks, from concerns on when Fed tapering will begin to a possible military strike in Syria and ongoing federal budget issues. CNBC has more:

"We know there has been a tapering story which has also turned into an emerging market sort of crisis story, and now on top of that you have this Syria story. You kind of have this triangle of pain," said Michael Hartnett, chief global equity strategist at Bank of America/Merrill Lynch. "Could one help to offset the other? There's no doubt that at the margin, Syria has the potential to reduce the tapering at the Fed. It's very much at the margin. The problem is the Fed is not going to see the real economy any impact from Syria in the next 20 days."