U.S. natural gas speculators this week boosted net longs for a second week in a row, betting prices will rise as temperatures fall, boosting heating demand for the winter, and as the United States exports more of the fuel. Speculators in four major NYMEX and ICE markets added to their bullish bets by 19,494 contracts to 184,841 in the week to Nov. 29, the U.S. Commodity Futures Trading Commission said on Friday. That compares with a five-year (2011-15) average net long position of around 118,300. The biggest net long position was 456,475 in April 2013, while the biggest net short position was 166,165 in November 2015, according to Reuters data. Gas futures on NYMEX averaged $3.16 per million British thermal units during the four trading days ended Nov. 29 versus $2.85 during the five trading days ended Nov. 22. There were only four trading days during the week ended […]