(Reuters) - The S&P 500 and Dow Jones indexes opened lower on Tuesday as coronavirus-related worries and simmering U.S.-China tensions weighed on sentiment at the end of what is expected to be the S&P 500’s best quarter since 1998.

The Dow Jones Industrial Average .DJI fell 83.37 points, or 0.33%, at the open to 25,512.43, and the S&P 500 .SPX opened lower by 3.04 points, or 0.10%, at 3,050.20. The Nasdaq Composite .IXIC gained 1.13 points, or 0.01%, to 9,875.29 at the opening bell.