Luxury residential rents in Hong Kong are expected to grow by 15 per cent over the next 12 months as a result of the inflow of expatriate executives, according to a report by Colliers. However, the firm believes price growth will narrow to 5 per cent. 'The further lowering of the loan-to-value ratio will impact overall sales as end-user demand will be affected,' says Simon Lo, executive director for research and advisory services at Colliers. But cash-rich mainland buyers will still be active, he adds.