The benchmark domestic stock markets today closed marginally lower amid global uncertainties following U.S. President Donald Trump’s proposal of steep tariffs on pharmaceutical imports. The Sensex at Bombat Stock Exchange settled at 83,516, falling by 195 points or 0.23 percent. Similarly, the Nifty-50 at National Stock Exchange wrapped up at 25,476, down by 46 points or 0.18 percent.