One key earnings detail may explain why this investor jumped into Delek stock.Florida-based GeoSphere Capital Management disclosed a new position in Delek US Holdings (DK 1.26%), adding 150,000 shares valued at approximately $4.8 million, in its November 14 SEC filing.What HappenedAccording to a filing with the Securities and Exchange Commission dated November 14, GeoSphere Capital Management established a new stake in Delek US Holdings (DK 1.26%). The fund acquired 150,000 shares during the third quarter, ...