Australia remains New Zealand's biggest investor with almost $115 billion worth of assets, surpassing Britain and the United States. According to Statistics New Zealand, China and Hongkong investments in New Zealand increased to more than $2 billion in 2013.

New Zealand's neighbour across the Tasman sea had investments worth $110 billion in 2013. Out of the $322 billion total foreign investment in New Zealand, more than 62 percent came from Australia, Britain and the U.S. The data also showed that about half of the investments in banks and insurance companies were placed with Australian-owned banks.

Meanwhile, the New Zealand dollar has fallen to its lowest levels in more than a year as of Sept 26 because the Reserve Bank of New Zealand has declared that the exchange rate is "unjustified and unsustainable." The country's central bank said that intervention is possible after deciding on important considerations.

According to a Wall Street Journal report, Reserve Bank of New Zealand Governor Graeme Wheeler said the exchange rate is vulnerable to a "significant downward adjustment" as the bank mulls a move to keep the New Zealand dollar at a more sustainable level.

The New Zealand dollar fell US$0.7995, its weakest exchange rate after the comments of the central bank. Reports said the strength of the local currency is largely due to New Zealand's strong economic performance compared to other developed countries after the global financial crisis. The country has enjoyed the benefits of being a small economy and booming demand of its dairy and meat exports.

New Zealand has outperformed the economies of the U.S. and the UK in the recent months. The country's economic growth is currently at a 10-year high. Amid speculation of an intervention, the central bank is allowed to do so if the exchange rate is seen as "exceptionally high or low" and if the currency level is unjustified. ANZ analyst Sam Tuck said the Reserve Bank of New Zealand is stepping up its focus toward the Kiwi since it believes the current level is creating an "imbalance" in the economy.