Stocks Shaky before Bernanke

the dow again struggles to gain.  dow is down another 50 points on the day and is nearing the 13,000 mark.  investors seem worried about the feds chairman's speech on friday.  the volatility of the stocks isnt likely to disappear anytime soon, said todd salamone, director of trading at schaeffer's investment research.  investors are hoping bernanke will stress that the central bank well step in if or when the markets deteriorate any further.