A customer looks at products at a Xiaomi shop in a shopping mall in Barcelona, Spain, in this file photo. Xiaomi Corp. said yesterday it will buy back up to HK$12 billion (US$1.53 billion) worth of stock in its biggest equity repurchase. The company, which listed its shares in July last year, has lost nearly a third of its market value so far this year. Xiaomi’s market share in China declined by a fifth in the April-June quarter even as that of smartphone giant Huawei Technologies surged by 31 percent, according to research firm Canalys.SD-Agencies