Delta Air Lines Inc DAL.N dropped 4.1% as the company forecast first-quarter profit below expectations. By Ankika Biswas and Amruta Khandekar Jan 13 (Reuters) - The S&P 500 and the Nasdaq pared losses on Friday on the back of easing inflation expectations and better-than-feared results from some U.S. banks, while gains in UnitedHealth kept the Dow afloat. The University of Michigan's survey on Friday showed an improvement in U.S. consumer sentiment, with one-year inflation outlook falling in January to the lowest level since the spring of 2021.