Natural Gas ETF Burning Up as Futures Climb Above $6

Natural gas exchange traded funds are heating up, with gas futures shooting above $6 for the first time in four years, as another cold winter front moves across the U.S. The United States Natural Gas Fund (NYSEArca: UNG) was up 4.9% Wednesday. UNG has gained 8.4% over the past week and is up 46.2%...