http://www.economist.com/blogs/graphicdetail/2012/01/daily-c...
Argentina was already close to the top, with a Big Mac going for $US4.94, not entirely crazy by any means. (On the other hand, given that you can get a full three-course steak dinner with wine in a nice restaurant for $US20 in Argentina I wonder who is eating these Big Macs). A 25% increase will take it up to something like $6.25, a little above Sweden.
The fact that the official exchange rate is 4.2 pesos to the dollar but Argentinians are willing to give you at least five pesos to the dollar in informal exchanges seems like a pretty bad sign.
The other interesting thing about that Big Mac index is that Argentina is one of the world's largest beef producers. So are Uruguay, Brazil and Australia, all clustered up there in overpriced burger land.