Renewed uncertainty in Greece shaved a cent off the value of the New Zealand dollar overnight.
The Greek prime minister's call for a referendum on the international bailout plan for the country sent share prices plunging on European and US markets.
The market in New Zealand followed suit.
BNZ currency strategist Mike Burrowes says currency traders are reluctant to take risks right now but if the situation in Greece becomes clearer the Kiwi and other currencies could settle down.
Oil prices have also slipped.