The Reserve Bank sold $256 million worth of New Zealand dollars in the month of April, according to data released by the bank today.
The data follows a speech from Reserve Bank Governor Graeme Wheeler this morning, in which he reiterated the bank's view that the New Zealand dollar exchange rate remained overvalued.
"Fortunately it has retreated a little in recent weeks with a stronger US dollar,'' he said.
The Reserve Bank has been responding to the rising exchange rate through two avenues - maintaining the Official Cash Rate (OCR) at an historically low level and through a through a degree of currency intervention.
"The downward pressure on inflation exerted by the high exchange rate means that the OCR can be set at a lower level than would otherwise be the case,'' he said in his speech notes. "In recent months we have undertaken foreign exchange transactions to try and dampen some of the spikes in the exchange rate,'' he said.