Shares in Optimus, the largest Polish personal computer assembler, continued to climb on the Warsaw Stock Exchange after they won a full listing earlier this month. They are now trading at $106.50, up from the issue price of $66, putting it on a price-earnings ratio of 35.9 and valuing it at some $120m. Of the 300,000 shares made available in the public offering, a little more than 8,000 were bought by foreign investors. Optimus sold a further 300,000 shares to its employees and management for $4.40 a piece on condition that these would not be traded on the stock exchange until 1995. A further 500,000 preference registered shares remain in the hands of the firm’s former owners.