Key TakeawaysThe S&P 500 jumped 1.6% on Wednesday, July 31, 2024, as the Fed announced its widely expected interest rate hold and tech stocks surged.Shares of Vistra Corp. soared as the nuclear power generator announced a license extension for one of its plants and power market prices moved higher. Humana shares tumbled after the health insurer said high inpatient hospital admissions and net costs could restrain its profits for the rest of the 2024. Major U.S. equities indexes rallied on the final day of Ju ...