RBNZ's Spencer - macro-prudential policy ultimately can't control the housing cycle

Comments from RBNZ head Spencer are crossing the wires via Reuters-

• Will review macro-prudential policy with treasury. 
• macro-prudential policy ultimately can't control the housing cycle
• Keen to see macro-prudential develop as credible and sustainable policy. 
• Macro-prudential has significantly improved the resilience of banks' balance sheets.