The Hong Kong Stock Exchange briefly attained the largest market capitalization of any bourse in the world on Wednesday after an announcement published by the People’s Bank of China appeared to confirm a stock trading linkup with Shenzhen’s exchange would launch this year, The Financial Times reported. Shares in Hong Kong quickly gave up more than half of their 9% in gains, however, once it became clear that the new piece quoting bank chief Zhou Xiaochuan was based on a speech he had given in May, prior to mainland stock market’s peak on June 12. Obliged to comment, Hong Kong Exchanges and Clearing denied an agreement had been reached.