Alibaba to Buy Back Up to $25 Billion of Stock

Alibaba Group Holding Ltd. boosted its share buyback program to $25 billion from $15 billion, in a bid to reassure investors about the company’s prospects after a year in which its stock has fallen by more than half.

The potential buybacks are substantial compared with the Chinese e-commerce giant’s market value: As of Monday, it had a market capitalization of about $270 billion, according to FactSet.