I thought I'd just add to this thread a little (seeing that you guys linked through to the original erroneous BigMac Index from my blog, IKN).
See above a five year chart for the US Dollar against a basket of South American currencies. It includes the Argentine Peso (ARS), the Colombian Pero (COP), the Chilean Peso (CLP), the Brazilian Real (BRL) and the Peruvian Nuevo Sol (PEN). The inference is clear and makes the title of this thread somewhat redundant; It's not a case of if the Peso is devalued, it's more that it's been in a constant devaluation for five years with a real acceleration in the last two.
There's a ton of things that could be said here, but I'll stick with just two. Firstly, the economic model used by Argentina is that of a weak currency to prop up exports. That's fine, but weak begets weak and as everyone in the world (which is something that extends far beyond CapFed) knows the policy, it's normal to see the ARS devalue against a currency that's been wweak in itself compared to the S.Am basket, i.e. the dollar. If you really want to see the deval, chart the ARS in BRl terms, like in this chart:
Secondly, inflation isn't necessarily a bad thing as long as you know how to handle it. In this respect South Americans have a big advantage over the average gringo feeling its effects for the first time. After all, you sitting in Argentina, the country that invented the accountancy techniques to explain company earnings in hyperinflation scenarios. The key to country survival in an inflationary scenario is to keep salaries at pace with prices. Now this sucks for anyone getting paid in dollars and spending them in BsAs, but hey....welcome to the world of the minority
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Right now, Argentina's macro isn't is bad shape. That one you can believe or not, but there's no collapse on the horizon for the moment....as long as China keeps buying those soybeans, anyway.