BUILDING firm Hoi Sing tumbled 22.5 per cent, or 14 cents, to close at 48 cents as a consortium related to business tycoon Li Ka-shing bought 36 per cent of the issued share capital of the firm at 38 cents. The worst-performing stock of the day, the counter has for the first time come closer to the offer price at which shares are sold in the event of a general offer resulting from a change of control of the company. The counter has been heavily traded at between 50 and 84 cents since it was announced on April 10 that a prospective buyer was in talks with Shougang Grand to acquire its 36 per cent stake in the issued share capital and 44 per cent of outstanding warrants in Hoi Sing. It was revealed on Sunday that Shougang Grand's stake was bought out for $40.9 million. Hoi Sing announced last Friday that it suffered losses of $139.5 million for last year. Also under pressure was Shougang Grand, which lost 11 cents, or 15 per cent, to finish the day at 62 cents on turnover of $5.56 million. The firm plunged into the red last year, reporting a loss of $199.58 million against a gain of $144.03 million in 1993. The company blamed an exceptional loss of $210.7 million, which included its associate Hoi Sing's loss, for the disappointing results. Asia Securities International, which earlier posted a 40 per cent drop in profit to $61.3 million for last year, came back to life after a period of quiet trading. Shares of the property and investment firm were heavily traded in the range between $2.85 and $2.90 before closing at $2.90. There was a turnover of $75.5 million with 26 million shares changing hands. Trading in the shares of Win Win International has been suspended since yesterday after Sunday's news that a prospective buyer was in talks with the controlling shareholders for the purchase of more than 50 per cent of their holding in the firm. This contrasted with a statement by the firm's directors on Friday, saying they knew of no reasons for the recent increase in the price and trading volume of the share. The counter surged 26 per cent to end at $1.09 on Friday. The firm explained that the talks did not start until Saturday and the directors were told on Sunday.