Yahoo earnings offer peek into Alibaba's cave of treasure

A slow buzz has been building around Alibaba, the Chinese e-commerce giant that is expected to debut on the American stock market in the next few weeks and whose valuation could be above $150 billion. Many Americans have likely never heard of the online retailer, but it dominates China's e-commerce market and is expected to be one of the largest initial public offerings by a tech company. Though comparisons are often drawn with Amazon, the company doesn't sell products directly to consumers. Ins...