The mortgage market is picking up momentum, but the rate of growth is glacial. Reserve Bank figures released on Friday show that the annual rate of growth in housing finance aggregates has increased from 4.4 per cent at the start of the year to five per cent in October.Investors are driving the growth. The value of investor housing loans increased by 0.6 per cent in October and by 6.4 per cent in the 12 months to October.The value of owner-occupier mortgages rose by 0.4 per cent in October and by 4.3 per cent in the 12 months to October.Business and personal lending remain weak. Business loan balances increased by 0.1 per cent in October and by 1.4 per cent in the 12 months to October.Personal loan balances fell by 0.1 per cent in October but rose by 0.6 per cent in the 12 months to October.According to Australian Prudential Regulation Authority banking statistics released on Friday, Macquarie Bank continues to record very strong growth rates in mortgage lending, with a three per cent increase in October and a 23.3 per cent increase over the 12 months to October.Other lenders with growth above system include HSBC, with growth of 8.6 per cent over 12 months, Suncorp (7.2 per cent), ANZ (7.1 per cent), National Australia Bank (6.9 per cent), and Commonwealth Bank (5.8 per cent).Despite its declared intention of returning to system growth, Westpac could only manage growth of 0.3 per cent in October, compared with system growth of 0.5 per cent.Household deposits are growing at double the rate of mortgage lending. According to APRA figures, household deposits increased by one per cent in October and by 8.1 per cent in the 12 months to October.