HONG KONG -- Alibaba Group Holding's shares jumped more than 11% on Tuesday after the Chinese e-commerce company said it had upsized a stock buyback program to $25 billion from an earlier $15 billion in its biggest such offer.
Shares in Alibaba, listed in Hong Kong and New York, fell to an all-time low last week on the back of a gloomy outlook for China's major tech companies and as it grapples with slowing revenue and a regulatory crackdown.
