Core Natural Resources, created last year by the merger of Arch Resources and CONSOL Energy, is drawing renewed interest from value managers that has put it back in its portfolio. The company produces and exports metallurgical coal used to make steel, along with thermal coal for power. The thesis rests on cash generation: it expects the company to convert a meaningful share of its market value into cash over the next few years and return it through share buybacks. Energy security concerns could support export demand, while reconstruction in conflict affected regions may lift steel demand and, in turn, metallurgical coal. The picture is not risk free. Coal prices swing, demand depends on steel and power markets, and even the article's author prefers other stocks for upside. It is a story of cash returns in a cyclical corner of energy. 

Finsum: Cyclical resource companies can reward patient value investors when cash returns arrive, but they work best as a sized position, since commodity prices can change the story quickly.