Wall Street ends flat after 2-day run; Dow stays above 20,000

Qualcomm weighed on both the S&P 500 and Nasdaq as the chipmaker fell 5.0 percent to $54.05 after posting a lower-than-expected rise in quarterly revenue. The post-election rally reignited this week following a solid start to earnings season and optimism over U.S. President Donald Trump's pro-growth initiatives, giving the benchmark S&P 500 its best two-day performance in seven weeks and catapulting the Dow above 20,000 for the first time. Early fourth-quarter earnings have also boosted