The memorandum said the Reserve Bank will have to consider the impact on monetary policy settings when using the new tools, and "in most instances macro-prudential instruments will reinforce the stance of monetary policy."
Last week the bank said it would roll out restrictions on high loan-to-value ratio lending if it posed a "significant risk" to the system, having cited rising property values and the growing prevalence of low-equity lending as threats to the country's financial health.
The Treasury today overhauled its forecast on house price inflation over the next five years, with annual inflation of 7.1 per cent in the 2013 and 2014 years, having previously seen housing inflation peak this year at 6.5 per cent, before slowing to between negative 1.3 per cent and plus 1.6 per cent over the following four years.
Real Estate Institute figures this week showed the stratified median housing price index, which smoothes out peaks and troughs, rose an annual 9.8 per cent in the year ended April. Auckland's stratified housing price was up an annual 14 per cent and Christchurch's climbed 13 per cent.
Housing Minister Nick Smith today announced the government has reached an accord with the Auckland Council, in the first agreement with local authorities to streamline resource consents and make housing more affordable.
The Reserve Bank's four new tools are adjustments to banks' core funding ratio, required capital buffers during excessive credit growth, capital requirements for specific assets, and restrictions on high loan-to-value ratio mortgage loans.
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