Oil prices retreated on Friday amid a global glut, racking up a 20 percent drop for November, while most major equity markets kept moves tight ahead of weekend talks between U.S. President Donald Trump and Chinese leader Xi Jinping.  U.S. shares, however, turned positive midday after a Chinese official said at the Group of 20 summit in Argentina that the United States and China were making progress on trade talks. “Consensus is steadily increasing,” Wang Xiaolong, director general of the Chinese Foreign Ministry’s department of international economic affairs, told Reuters on the sidelines of the summit. In Europe, Frankfurt’s export-heavy DAX stock index and Britain’s domestic-focused FTSE 250 both faced a fourth consecutive month of declines. The German index had its worst run since late […]