The most traded company in the S&P 500 was Tesla Inc TSLA.OQ, with $42.9 billion worth of shares exchanged during the session. By Noel Randewich Feb 17 (Reuters) - The S&P 500 ended lower on Friday, weighed down by Microsoft and Nvidia as investors worried that inflation and a strong U.S. economy could put the Federal Reserve on pace for more interest rate hikes. The see-saw session on Wall Street followed economic data this week that pointed to elevated inflation, a tight job market and resilience in consumer spending, giving the Fed more room for to raise borrowing costs.