The Economist's BigMac index has had his fortune as informal way of measuring the purchasing power parity (PPP) between two currencies.
Now Commonwealth Securities has launched an iPod index, based on the cost of the 2 gigabyte iPod Nano player as a way of showing if a currency is overvalued. BBC has a report on it.
P.S.: If you plan to buy a iPod and you leave up north you should head your way into Canada.
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