CONCLUDED Stock Market News From Sept. 30, 2025: Dow Hits New Record Last Updated: 6 hours ago Pfizer, Drug Stocks Leading S&P 500 on Pricing Deal with White House By Connor Smith Pharmaceutical stocks were giving the market a big boost on Tuesday. Merck was the top S&P 500 stock, while Pfizer was also among the leaders. The S&P 500 health care sector overall was up 1.6%, well above the other major sectors. The second-best sector was consumer staples, up just 0.4%. President Donald Trump said Tuesday that P ...