Light crude oil futures are extending their gains this week, up 5.70% and threatening to break out to the upside as U.S.-Iran tensions continue to escalate. The market has rallied more than 20% from its December lows, and the big question now is how much further it can go given that the world remains well-supplied with oil. Wednesday's 4% Jump Was Just the Beginning Wednesday's 4% single-session surge set the tone for the week. It was a direct reaction to the military buildup in the Middle East and the growing fear that the U.S. is preparing to…