Dec 24 (Reuters) - Wall Street's main indexes opened flat to slightly higher in Tuesday's shortened trading session, with U.S. stocks entering a historically strong period before rounding off their second consecutive year of gains.
The Dow Jones Industrial Average .DJI rose 9.5 points, or 0.02%, at the open to 42,916.48. The S&P 500 .SPX rose 10.6 points, or 0.18%, at the open to 5,984.63, while the Nasdaq Composite .IXIC rose 53.6 points, or 0.27%, to 19,818.476 at the opening bell.
(Reporting by Medha Singh in Bengaluru; Editing by Pooja Desai)
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