S&P 500 Gains and Losses Today: Micron Stock Pops as Sales and Guidance Impress

Key TakeawaysThe S&P 500 added 0.4% on Thursday, Sept. 26, reaching a record closing high after a positive update on second-quarter GDP growth.Micron Technology shares soared as strong AI demand helped the memory chip maker blow past quarterly sales estimates.Shares of Super Micro Computer plunged amid reports of a federal investigation into the company's accounting practices. Major U.S. equities indexes pushed higher as the latest estimates from the Bureau of Economic Analysis showed that U.S. gross domest ...