Research released by the Customer Owned Banking Association illuminates how the major banks are extending their grip on parts of the financial system outside banking, particularly funds management and financial advice.Consultants Macroeconomics worked out the major banks' market share for COBA, and came up with this:•    in funds management, the Big Four banks accounted for 34 per cent of total industry revenue in 2012/13, up from 25 per cent in 2008/09.•    in superannuation funds management, the Big Four banks accounted for a 26 per cent share of industry FUM in 2012/13, up slightly from 24 per cent in 2004/05.•    in life insurance, the Big Four banks accounted for 27 per cent of industry premium and investment revenue in 2012/13, up from 11 per cent in 2009/10.•    in general insurance, the Big Four banks are not major players.•    in financial planning and advice, the Big Four banks accounted for 36 per cent of industry revenue in 2012/13, up from 15 per cent in 2007/08. Macroeconomics said this market share increase "may understate the true position."•    in mortgage broking, the major banks accounted for around 18 per cent of market revenues in 2012-13.