a friend listed 4 fundamentals that are bad for bulls
1) inflations and high commodity prices historically bad for stock return
2) uncertainty in middle east and the possibilities of oil shock
3) unprecedented experiments in monetary policy, most in uncharted water, 100% confidence vote and blind trust to policy makers are simply foolish
4) the aftermath of a historical credit/housing bubble generally does not bode well - Japan's experience still can't be ruled out.