The drop in rates comes two days after Statistics New Zealand reported consumer price inflation fell by 0.5 per cent over the December quarter and rose by 0.1 per cent in the calendar year.
Market and Reserve Bank expectations were for a 0.2 per cent quarterly decline in the CPI.
Lowest fixed two-year rates: TSB Bank: 4.29 per cent SBS Bank: 4.35 per cent Westpac: 4.39 per cent BNZ: 4.39 per cent Source: Interest.co.nz