My stock tip today is an emerging markets stock that made a splash when it came public in the U.S. in early December. It’s E-Commerce China Dangdang (DANG), an online bookseller that’s being called “the Amazon of China.” There’s plenty of precedent for calling a company “the _______ of China,” including Ctrip.com (the Expedia of China) and Baidu (the Google of China). And the implication that a similar business proposition will prosper in China as it has in the U.S. is actually fairly sound. Dangdang had six million active customers in 2009 and sales of $298 million. In a...