** Shares of U.S. natural gas companies fall, tracking a decrease in natgas futures NGA
** U.S. natgas futures NGc1 down 11.5% at $6.019 per million British thermal units
** Natgas prices fall on forecasts for less cold weather over the next two weeks than previously expected, a small increase in output as some frozen wells return to service and low gas flows to liquefied natural gas $(LNG)$ export plants
** Natgas companies: CNX Resources CNX.N down ~3%; Expand Energy EXE.O loses 4.5%
** Natgas ETFs: United States Natural Gas Fund UNG.P and ProShares Ultra Bloomberg Natural Gas BOIL.P both down marginally
(Reporting by Dharna Bafna)
((Dharna.bafna@thomsonreuters.com))