The natural gas market was jolted awake on Tuesday as a displaced polar vortex tears through the Northern Hemisphere, bringing freezing temperatures to much of the central and eastern United States. U.S. natural gas futures have ignited, surging 27% to trade near $3.94 per MMBtu, according to Trading Economics. Tuesday's meltdown in market stability marks the largest single-day percentage gain in over a year, driven by a scramble among traders to price in the extremely cold forecast that extends through the ...