Major indices on Wall Street opened with slight gains on Wednesday after a session marked by risk aversion due to Moody's downgrading the credit ratings of some banks. Attention is now turning to the inflation report set to be released this week. The Dow Jones Industrial Average rose by 9.79 points or 0.03 percent to 35,324.28 points. The S&P 500 increased by 2.19 points or 0.05 percent to 4,501.57 points, while the Nasdaq Composite climbed 13.28 points or 0.10 percent to 13,897.61 points.