The U.S. stock futures rallied 0.9%-1.5%. DJIA futures regained 270 pts or 0.9% to 31,472. S&P 500 futures and Nasdaq 100 futures likewise ascended 1.1% and 1.5%, to post at 3,939 and 12,055, respectively. Key European stock markets advanced in early session. Stoxx Europe 600 Index gained 1.1% to 432.64. DAX hiked 1.2% to 1...