Foreign exchange brokers and traders are channelling investments into the Australian dollar in order to capitalise on the country's trade relationship with China.Australia is the world's largest producer of iron ore used in making steel and Bloomberg tracking data shows that the national currency has climbed 35 per cent in the last year as traders have recognised the strength of this position."They export iron, gold, copper - everything that China wants to buy. Domestically, Australia is very healthy. The central bank may continue to raise rates," said Masataka Horii, one of four investors for the Kokusai Global Sovereign Open, Asia's biggest bond fund.The Reserve Bank of Australia has also showed its confidence in the national economy with a recent 25 point hike to the cash rate, the first raise seen since the onset of the financial crisis in September last year.Responding to the crisis, the central bank lopped a total of 425 basis points off the cash rate in a series of cuts running into the second quarter of 2009.