 In 1965, Hang Seng Bank suffered from bank run of which depleted almost one-fourth of its deposits.Because of that, The Hongkong and Shanghai Banking Corporation (HSBC) acquired a 51% interest of Hang Seng Bank, later increased to 62.14%, and owned the controlling power of Hang Seng Bank.In 1969, the Hang Seng Index was introduced as a public service.