The decision of two of the country's big four trading banks to stop lending to foreign buyers of houses here appears to have taken everyone by surprise. If the Reserve Bank had any warning, Governor Graeme Wheeler gave no hint of it in his monthly announcement of the official cash rate the same day.
Commentators had not raised the possibility and economists, even those employed by the banks, were unable to explain the decision yesterday. That suggests it was taken purely for the reasons the banks gave: they do not want higher exposure to the particular risk of loans to non-New Zealanders living and earning incomes outside this country.
The decision must come as a blow to the Government's credibility on foreign buyers. For years it has been insisting they were not a significant presence in the New Zealand residential property market.
Ministers strenuously maintained this view after the moves by Westpac and ANZ on Thursday, but the banks' actions simply speak louder than the Government's words. Trading banks are not known for restricting their business for the sake of public applause. If they are worried about the level of credit they have given to borrowers living overseas, the level must be substantial.
The same decision had already been taken by their parent banks in Australia, when bank lending policies have been under much heavier public criticism than here, and the political climate across the Tasman has been heated by the election to be held four weeks from today. But even there, it is hard to believe the banks would act for a political purpose.