By Caroline Valetkevitch NEW YORK (Reuters) -Global stock indexes were flat to lower on Thursday as data showed U.S. consumer price inflation came in above economists’ expectations in December, raising some doubts that the Federal Reserve will cut rates as soon as some traders expect. Bitcoin rose to a two-year high as several exchange-traded funds (ETFs) tied to the spot price of the cryptocurrency began trading. U.S. Treasury yields slid, while the dollar was down on the day against the euro and the yen but off lows reached before the U.S. CPI report. The day’s data showed headline CPI rose …