The stock exchange has taken the unprecedented step of publishing a list of companies under investigation by the Securities and Futures Commission (SFC) for exceptional share price movements.
Stock exchange spokesman Henry Law Man-wai said the move was aimed at ensuring the market remained 'well-informed'.
Market watchers said high-profile public disclosure was part of the exchange's latest effort to curb speculation.
The exchange said 11 companies had been 'temporarily suspended due to inquiries into unusual trading movement by the SFC'.
They were property companies Hansom Holdings, Chun Wo Holdings, Chevalier Development International, Singapore (HK) Properties Investment, Yiu Wing International Holdings; eye-glass retailer Shenzhen International Holdings; shipping companies AWT World Transport Holdings and Continental Mariner Investment; Lippo and its subsidiaries Hongkong China and HKCB Bank Holding.