Key TakeawaysThe S&P 500 added 0.3% on Tuesday, May 21, 2024, ahead of a noteworthy earnings report and as a Federal Reserve official expressed caution on rate cuts.First Solar shares soared after UBS analysts boosted their price target on the stock, noting the solar panel maker is poised to benefit from tax credits.Shares of Nordson Corp. sank after the industrial equipment maker lowered its full-year outlook, citing challenges in its electronic end markets. Major U.S. equities indexes ticked higher on Tue ...