February 11 (Reuters) - Wall Street's main indexes opened higher on Wednesday after stronger-than-expected jobs data pointed to a robust U.S. economy, while the unemployment rate fell in January.

The Dow Jones Industrial Average rose 55.0 points, or 0.11 percent, to 50,243.15 at the open. The S&P 500 gained 34.7 points, or 0.50 percent, to 6,976.48. The Nasdaq Composite climbed 175.8 points, or 0.76 percent, to 23,278.29.