Yahoo! Inc. has cost its shareholders so much money that a buyer would now be able take over the most-visited U.S. Web portal for less than the value of its stakes in Alibaba Group Holding Ltd. and Yahoo Japan Corp.
Yahoo has plummeted 91 percent over the past decade as it failed to keep Google Inc. and Facebook Inc. from siphoning off Internet users and advertising revenue. Sunnyvale, California-based Yahoo, which rejected an offer from Microsoft Corp. for as much as $47.5 billion three years ago, is now valued at $14 billion, according to data compiled by Bloomberg.