HSBC, Hong Kong’s largest bank with a 6.2 million-strong customer base, suffered a widespread system breakdown on Friday afternoon. According to some customers, the bank’s mobile app and online services were inactive as early as 1pm, with login attempts diverted to a screen stating the system was under maintenance and would be accessible at a later time. A staff member at the bank’s Mong Kok branch said HSBC’s citywide computer network had failed early Friday afternoon, but the employee did not...