The effect of UK building society conversion on pricing behaviour

The Building Society Act, 1986, allowed British building societies to convert from mutual to plc bank status - quoted on the stock market. Eight mutuals converted in the period 1995-2000. This study examines the pricing behaviour of the converted mutuals and remaining building societies to address the question of whether a change in ownership structure caused managers of the new stock banks to place profit/shareholder concerns ahead of the interests of the customer/owners of mutual building societies. Econometric tests using monthly interest rate data (1995-2001) on deposit products and mortgages confirm that managers began to set prices which would improve profits, at the expense of depositors and mortgagees. Deposit/mortgage rates were found to be permanently lower/higher post-conversion, the converts responded more rapidly to changes in the market rate of interest, and the new banks offered proportionately more rip-offs than the remaining building societies.