United States Natural Gas Fund (UNG) is down -7.2%, or -$1.43 to $18.51. Published first on TheFly – the ultimate source for real-time, market-moving breaking financial news. Try Now>> See Insiders’ Hot Stocks on TipRanks >> Read More on UNG: United States Natural Gas Fund rises 4.8% United States Natural Gas Fund falls -7.9% United States Natural Gas Fund falls -4.3% Unusually active option classes on open December 31st United States Natural Gas Fund rises 16.1% Disclaimer & DisclosureReport an Issue