The euphoria which has prevailed on financial markets for a month, following Donald Trump election seems unfailing. Monetary policy becoming more restrictive and the dollar rise which resulted from it, did not undermine commentator optimism and investor appetite. After a gloomy start this year, American growth rebounded during the third quarter to reach, on an annual basis, a rhythm close to 3%. In November, unemployment rate staid at 4.6%. In this economic environment, Janet Yellen, who chairs the American central bank, announced last week, an increase of its key interest rate, which was expected. But, and that was much ...