The global wealth of high-net worth individuals is set to rise from a current $50 trillion (€31.7 trillion) to $75 trillion by 2012, although this implies a slow down in the rate of increase, according to consulting firm Oliver Wyman.

In a newly-published report on the industry, Wyman, part of US finance group Marsh & McLennan, said the rate of increase was 11% a year over the last five years. But it expects this rate of increase to slow to 9% in the next five, due to less buoyant market conditions.