The shares, priced at HK$8.50, are expected to begin trading at about HK$8.10 although that would still leave private investors with a wafer-thin profit, They received a 5% discount on the price, so the stock cost them HK$8.075. The prospects for the debut were darkened by big falls in other bank stocks, with HSBC Holdings down HK$2.50 to HK$84.75, it slowest level since March.