Dow Jones Industrial Average index climbed slightly higher on Wednesday, posting gains for a sixth straight session. Blue chip index advanced 0.13% or 16.42 points and closed at 13,194.10 with financial sector gaining most. American Express jumped 3.5% after the company passed stress test and announced an increase in dividend and a stock buy back worth USD 5 billion. Heavyweight Bank of America provided substantial upside support, adding 4.1% after passing Fed's stress test.