Stocks are mixed at the close of trading as Wall Street looks ahead to key trade talks between the US and China this week, the AP reports. The Dow Jones Industrial Average fell 53 points, or 0.2%, to 25,053, mostly due to declines in UnitedHealth and Disney. The S&P 500 rose 1 point to 2,709, while the Nasdaq gained 9 points to 7,307. US officials led by Treasury Secretary Stephen Mnuchin will meet with Chinese officials later this week. The talks are aimed at resolving a trade war that threatens to stunt global economic growth. Norfolk Southern rose 3.2%. The railroad operator is moving forward with a plan to cut costs and boost revenue growth. Tesla rose 2.3% after an analyst upgraded the stock to a "Buy". (More stock market stories.)