Natural gas-related exchange traded funds are rallying as a heatwave across the U.S. fuels electricity demand for air cooling. The United States Natural Gas Fund (UNG) rose 0.8% on Thursday and jumped 19.4% over the past week. Meanwhile, Nymex natural gas futures were trading around $7.93 per million British thermal units before breaking back above the [...] The post Natural Gas ETFs Are Gaining Momentum as the Summer Heat Rages appeared first on ETF Trends .