A rally from the “magnificent seven” tech stocks perhaps predictably fueled the rally, but this surprise name was the S&P 500’s biggest gainer Thursday.

Nvidia has led the S&P 500 ( ^GSPC 1.70%) higher this year amid frenetic interest in artificial intelligence (AI). The stock has surged 136% since January, and Wall Street analysts forecast median upside of 30% from the current share price of $115. But betting on a single AI stock is a bad strategy.

Asian markets have forged higher after the Federal Reserve kicked off its efforts to prevent a recession in the U.S. with a bigger-than-usual cut to interest rates

Markets on Wall Street were positioned to open at record highs Thursday after the Federal Reserve issued a bigger-than-usual interest rate cut intended to fortify a cooling labor market and prevent a

Markets in Europe and Asia shot higher on Thursday after the Federal Reserve kicked off its efforts to prevent a recession in the U.S. with a bigger-than-usual cut to interest rates. U.S. futures were higher after a lackluster response on Wall Street to the Fed's move the day before.

Wall Street is roaring toward records as a delayed reaction of jubilation sweeps markets worldwide following the Federal Reserve’s big cut to interest rates. The S&P 500 was 1.6% higher in early trading Thursday and above its all-time closing high set in July.