Warrior Met Coal, the leading U.S. exporter for high-quality metallurgical coal, confirmed it has completed three planned longwall moves. It plans to ramp up production in Alabama to meet a tight market for high-quality premium met coal market. Prices for seaborne met coal are expecting to climb higher in the first quarter of 2018, reflecting resilience in global steel production, as well as the effects of met coal supply disruptions in Australia and supply side reforms in China, the company said.