Quote from baggerlord:
You have mentioned AUD tracks commodities. Can you explain this?
Quote from Maverick74:
The Aussie, loony, south African rand, and Brazil are known as commodity currencies since their economies are highly natural resource dependent. Aussie probably being the most popular and most widely followed.
Here is the official definition.
http://en.wikipedia.org/wiki/Commodity_currency
A commodity currency is a name given to currencies of countries which depend heavily on the export of certain raw materials for income. These countries are typically developing countries, eg. countries like Burundi, Tanzania, Papua New Guinea; but also include developed countries like Canada and Australia.
In the foreign exchange market, commodity currencies generally refer to the Australian dollar, Canadian dollar, New Zealand dollar, Norwegian krone, South African rand, Brazilian real, and the Chilean peso.