By Caroline Valetkevitch NEW YORK (Reuters) – The U.S. dollar index reached a two-week high on Monday, with investors anxious over tensions in Ukraine and as St. Louis Federal Reserve president James Bullard reiterated calls for a faster pace of U.S. Federal Reserve interest rate hikes. Bullard on Monday also said that four strong inflation reports in a row warranted action. Last week’s stronger-than-expected U.S. consumer price index report has driven speculation the Fed might raise rates by a full 50 basis points in March. “Clearly we still have the after shocks of last week’s inflation repo…