Stocks had risen sharply earlier after inflation data backed the Federal Reserve's patient stance on future interest rate hikes. By Caroline Valetkevitch NEW YORK, March 13 () - U.S. stocks pared gains on Wednesday as Boeing shares dropped after President Donald Trump said the United States was going to order the grounding of Boeing's 737 MAX jets after a fatal crash in Ethiopia. A number of other countries have announced they were grounding the best-selling 737 MAX jets.