Hong Kong's homebuyers piled into the property market on the National Day holiday, snapping up more than 80 per cent of the flats on offer, encouraged by an improving local economy.Market observers said buyers were rushing into the market to get ahead of rising prices and potentially higher mortgage rates, as the Hong Kong Monetary Authority was likely to raise interest rates in lockstep with the US Federal Reserve's tapering measures, which may come sooner than anticipated.Nan Fung Group and...