NEW YORK, June 11 - The S&P 500 closed nominally higher at the end of a torpid week marked with few market-moving catalysts and persistent concerns over whether current inflation spikes could linger and cause the U.S. Federal Reserve to tighten its dovish policy sooner than expected.Economically sensitive smallcaps and transports notched solid gains, outperforming the broader market.For the week, the S&P and the Nasdaq advanced from last Friday's close, while the Dow posted a weekly loss.But th