Oil prices surged to one of their strongest performances of the year as signs that oversupply may wane and the global economy may improve keep encouraging traders to bet on an oil rebound. Oil prices jumped 8% on the week, their best week in a month, largely from Friday’s rally. For U.S. oil, it was the 12th session in a little more than two months that prices climbed about 5% or more. The market has become prone to large swings upward with many traders eager to bet a big recovery is on the way after 20 months of steady losses sent oil to a 13-year-low in February. There were few clear triggers for Friday’s rally, though most boil down to further speculation on a recovery, brokers and traders said. Federal Reserve officials late Thursday and early Friday made comments considered optimistic on the U.S. economy and flat U.S. interest […]