A volatile coal market, a strong balance sheet, and a rare earths angle explain why this position keeps getting bigger.On November 14, Connecticut-based Discovery Capital Management disclosed a significant buy in Ramaco Resources (METC +3.57%), increasing its stake by 4.18 million shares and seeing the overall position climb by about $164.67 million in value.What HappenedAccording to an SEC filing dated November 14, Connecticut-based Discovery Capital Management added 4.18 million shares of Ramaco Resources ...