Stocks closed higher on Wall Street as the Trump administration sought to win more deals with global trading partners. The S&P 500 rose 0.6% Wednesday. The Dow Jones Industrial Average added 0.5%, and the Nasdaq composite rose 0.9%. Nvidia became the first public company to top $4 trillion in value. Merck rose after announcing it would buy Verona Pharma, a U.K. company that focuses on respiratory diseases. Copper prices eased after spiking a day earlier as President Donald Trump said he would impose 50% tariffs on imports of the metal. Treasury yields slipped in the bond market.

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