[ad_1] US stocks opened mixed as investors cautiously returned to tech and growth stocks, while healthcare weighed heavily on the broader market as global financial markets remained volatile on Thursday.Investors assessed a mix of corporate earnings, central bank signals, and geopolitical developments. While some sectors showed signs of recovery, others continued to feel pressure amid persistent uncertainty surrounding US trade policy and interest rate expectations.At 9:35 AM ET, the S&P 500 was up 11.97 points, or 0.23%, at 5,287.67, while the Nasdaq gained 20.91 points, or 0.13%, to trade at 16,328.07. However, the Dow Jones Industrial Average tumbled sharply, falling 500.65 points, or 1.26%, to 39,168.74 around 9:35 AM ET, dragged lower by continued weakness in UnitedHealth and other healthcare majors. The stock has been under pressure amid regulatory scrutiny and investor concerns over rising costs.Commodities showed a split trend. […]