The S&P 500 ended Thursday's trading session with gains thanks to shares of Nvidia, Apple and Tesla, after U.S. President Donald Trump unveiled a plan to impose reciprocal tariffs on trading partners US. A White House spokesman said the tariffs would be in line with the higher duties levied by other countries and could be imposed in a within weeks while Trump's trade and economic team is examining bilateral tariff and trade relations. The S&P 500 index rose more than 1 percent, its biggest gain since Jan. 15 Jan. The Nasdaq added 1.50%. The market's rise comes amid a weakening U.S. dollar. At the current moment, the dollar index is testing the low reached at the end of last month.