For a stock with more upside, I like small-cap Puda Coal. PUDA uplisted to the Amex exchange in September 2009 and saw its stock shoot up more than 20% on the day. The company is a supplier of high-grade metallurgical coking coal used to produce coke for steel manufacturing in China and a coal mine consolidator of eight coal mines. The company recently raised $13 million in a common stock offering priced at $4.75 per share to fund the acquisition of two new coal mines. Investors clearly like the story because the stock has risen from below $5.00 to more than $7.00 at present. Puda trades at only 16 times trailing earnings, which is a clear discount to U.S. comparables such as James River Coal Company ( JRCC), which trades at 22 times earnings and Pacific Coal ( PCX), which trades at more than 30 times earnings, despite having similar margins to both. As a result, over the next year, PUDA could potentially have 50%-100% upside in its share price.