The latest U.S. economic data was a mixed bag, and Federal Reserve Chairman Jerome Powell warned of potential long-term interest rate increases, posing policy challenges. U.S. stocks opened lower on Thursday but closed higher, with the DJIA reversing from a plunge of up to 273 points to soar 271 points or 0.7%, closing at 42,322. The S&P 500 added 24 points or 0.4% to settle at 5,916, marking its fourth day of upswing. The Nasdaq dipped 34 points or 0.2% to rest at 19,112.Related NewsCLSA Expects Alibaba (BABA.US) to Achieve DD Growth in Adj. EBITA This FY, Keeps ADR TP at US$165Insurance company UnitedHealth (UNH.US) plunged 11% as the U.S. Department of Justice launched an investigation into the company.Techs waned, with Amazon (AMZN.US) and Meta (META.US) both shedding over 2%; Tesla (TSLA.US) down 1.4%; and Nvidia (NVDA.US) , Apple (AAPL.US) , and Alphabet (GOOG.US) each fading less than 1%.(Real-time Streaming US Stocks Quote; Except All OTC quotes are at least 15 minutes delayed.)