Share trading in Pacific Century CyberWorks was suspended yesterday, pending clarification about a disclosure of US$1 billion in unrealised gains, according to sources. Trading in the company's Singapore parent - Pacific Century Regional Developments - was also stopped on the city-state's exchange, pending notification of the clarification. A CyberWorks spokesman, without giving further details, said the suspension was made to allow time to clarify a press report. On Thursday, CyberWorks group managing director Alex Arena said the company had made an unrealised gain of $1 billion on investments. CyberWorks would need to clarify for the stock exchange how much profit it planned to book in its profit and loss account and for what periods, analysts said. The company, set up last August, has invested in more than 40 companies at a total cost of $600 million. The value of this portfolio has appreciated by about $1 billion, according to the company. Analysts said it was unjustified for CyberWorks to be suspended from trading for a full day. A source close to CyberWorks said its trading suspension was requested by the Securities and Futures Commission, even though the stock exchange had said the suspension was made at the company's request. He said the SFC viewed the disclosure of an unrealised gain as a price-sensitive issue, as it was made when CyberWorks was involved in a takeover of Cable & Wireless HKT and it was expected to release its 1999 results. CyberWorks' shares were also suspended because of a pending placement, according to a market rumour denied by the company. CyberWorks was suspended before trading began. Pacific Century Regional Developments climbed 3.5 per cent to S$29.20 (about HK$132.75) before it was suspended.