U.S. natural gas gains on cold weather demand

U.S. natural gas increased to the highest level since November 1, 2011, after the demand was booster by colder-than-normal temperatures in northern states, which are supposed to stay below the 30-year average for more than 8 days. April gas futures advanced by 1.7% to $3.938 per million British thermal units on NYME after it improved by 6.7% last week.