Sun Pharmaceutical Industries Ltd., Power Grid Corp. and Cipla Ltd. were the top gainers on the NSE Nifty 50.Tata Consultancy Services Ltd., HCL Technologies Ltd. and Tech Mahindra Ltd. were the worst performers.The NSE Nifty 50 closed 0.35% lower at 23,250.10 and the BSE Sensex ended 0.42% down at 76,295.36.US President Donald Trump imposing heavy tariffs on India and the world affected the benchmark equity indices negatively.