Which big bank is stealing customers from others?

National Australia Bank is the leading big bank for retail customer acquisition by a really big margin according to Roy Morgan Research.

NAB's customer numbers grew by 15.7 per cent over the last four years. Commonwealth Bank and Bankwest grew their customer numbers by 5.2 per cent, ANZ – 2.7 per cent and Westpac (including St George) grew by 2.5 per cent.

Roy Morgan reported that NAB customer acquisition was strongest in among customers with low value deposit accounts, loans and credit cards.

Source: Banking Day