Dow slips on UnitedHealth CEO switch, but S&P 500 and Nasdaq push higher

12:44pm: Cooling inflation boosts Nasdaq US stocks are painting a mixed picture at midday as Wall Street processes fresh inflation data and a potential easing in trade tensions with China. While tech stocks are surging, the blue-chip Dow is feeling the weight of company-specific woes. At midday, the Dow Jones Industrial Average is down 0.4%, while the S&P 500 is up 0.7% and the…