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Nov 12 (Reuters) – The S&P 500 and the Dow fell at the open on Thursday as U.S. coronavirus infections surged and investors weighed the timeline for the mass roll-out of an effective vaccine.

The Dow Jones Industrial Average fell 165.72 points, or 0.56%, at the open to 29,231.91.

The S&P 500 opened lower by 9.99 points, or 0.28%, at 3,562.67, while the Nasdaq Composite gained 16.07 points, or 0.14%, to 11,802.50 at the opening bell. (Reporting by Shivani Kumaresan in Bengaluru; Editing by Sriraj Kalluvila)