Bristol-based Alpha Natural Resources stock jumped 14% Thursday after the company announced fourth-quarter results for 2012. The better-than-expected performance saw them closing New York Stock Exchange at $9.67 per share after the company posted $128 million loss. Analysts praised the company for its cost-cutting. A company spokesman said that the idling of high-cost production mines, curtailed capital expenditures, the reduction of operating costs by $150 million and improving its liquidity position were major considerations. (CS)