Alibaba a rare bright spot in Yahoo's dark decade By: CNBC.com News September 15, 2014 at 10:39 AM EDT When Yahoo plunged $1 billion into Alibaba nine years ago, business was looking good. Since then, it's the only thing Yahoo has gotten right. Read More >> Related Stocks: Alibaba Group Holding Ltd Facebook Google, Inc. Microsoft Pandora Media Inc Twitter, Inc. Yahoo