slightly off topic, but there's the theory that if the oz dollar falls, we won't be too badly off when it comes to petrol.
This is because the oz dollar to a large degree tracks commodity prices, so the oz is more likely to fall when commodities fall (OK the recent iron ore plunge is a case when it didn't).
So the theory goes that petrol prices are likely to have fallen along with the oz and we won't notice as big an effect as you'd think.
Certainly relevant with regards input costs to mining though.
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