The New Zealand dollar – tipped to be one of the hottest currency trades this year – soared to its highest level since August 2011 on Friday, but is there a danger the party could be over soon?

The kiwi hit a two-and-a-half-year high of $0.8693 on Friday, spurred by better-than-expected trade data and comments from the Reserve Bank of New Zealand's (RBNZ) deputy governor Thursday that suggested the bank was not worried about its recent strength.