Signs in Hong Kong that buyers' appetites for stock was returning sent the Hang Seng index up 186.39 points to 10,765.58. Investors were cheered by strong demand for the latest tranche of the Tracker Fund, the unit trust launched by the government to offload shares it snapped up in 1998. Property stocks led the rise for a second day as buyers judged that the present record affordability levels of residential apartments would boost sales. Cheung Kong, flagship property company of tycoon Li Ka-shing, rose after the company tightened its grip on the market through the purchase of two local development companies.