The New Zealand dollar slid along with other major currencies against the US dollar, as investors bought back the greenback after selling it following a more cautious outlook from the Federal Reserve.
The kiwi fell to 73.80 US cents at 8am in Wellington, from 74.62 cents at 5pm yesterday.
The trade-weighted index declined to 77.88 from 78.23 yesterday.
The US dollar index, which measures the greenback against a basket of currencies, dropped significantly yesterday after the Federal Reserve Open Market Committee signalled a more gradual path to interest rate rises, but has now returned to the level it was trading at prior to the Fed's statement.
The rebound in the greenback has pushed down all other major currencies against it, particularly the euro as traders are concerned about the outlook for the Greek economy.