Wall Street falls as banks set stock offerings
Bernanke to speak on financial system after market close
The Dow Jones industrial average dropped 91.28 points, or 1.06 percent, to 8,483.37. The Standard & Poor's 500 Index fell 13.77 points, or 1.48 percent, to 915.46. The Nasdaq Composite Index lost 23.37 points, or 1.34 percent, to 1,715.63.
(Reporting by Rodrigo Campos; editing by Jeffrey Benkoe)