The New Zealand dollar dropped to a six-week low after Reserve Bank governor Graeme Wheeler explicitly invoked one of the criteria to intervene in currency markets in calling the kiwi's strength "unjustified."
The kiwi sank to 85.83 US cents at 5pm in Wellington from 87.02 cents immediately before the RBNZ release, and 86.81 cents yesterday. The trade-weighted index dropped to 87.07 from 80.82 yesterday.
Wheeler raised the official cash rate a quarter-point to 3.5 percent and indicated the RBNZ would assess the impact of its four increases, while saying kiwi dollar strength was "unjustified" and that the currency could have "a significant fall."
The Reserve Bank's intervention policy includes a requirement that the currency must be "unjustified" based on a range of economic fundamentals, and must be at an exceptionally high or exceptionally low point in the cycle.
"The use of the exact word in the RBNZ's intervention bible - that's why the market reacted," said Tim Kelleher, head of institutional FX sales NZ at ASB Institutional in Auckland. "You'd normally see the kiwi go 1 US cent in our time zone, it's been capped at 86.25/50, and might move to 85.50 overnight."