Leung said the survey had indicated a growing interest in currency hedging from importers to protect them against the risk of the New Zealand dollar falling.
But if importers had been slow to act they might have "missed the boat" in terms of getting cover in place, Leung said.
The bank expects the dollar to trade at around US81c to US82c over the next year.
Leung said that expectation was based on New Zealand's economic growth being more favourable.
The survey had found businesses continued to see the difference in interest rates between New Zealand and the US as the key factor behind the New Zealand dollar's strength.
But the importance of quantitative easing by major central banks had also grown as a driver and was seen as the second most important factor.
The barometer surveyed 378 businesses turning over at least $1 million a year.