Jan 21 (Reuters) - Wall Street’s main indexes opened near record highs on Thursday as investors counted on more pandemic relief and speedy vaccine roll-outs under the Biden administration to support the economy after data showed a weakening labor market recovery. The Dow Jones Industrial Average rose 9.6 points, or 0.03%, at the open to 31198.01. The S&P 500 rose 5.6 points, or 0.15%, at the open to 3857.46, while the Nasdaq Composite rose 64.2 points, or 0.48%, to an all-time high of 13521.476 at the opening bell. (Reporting by Devik Jain in Bengaluru; Editing by Shounak Dasgupta)