Tung148

[flickr id=”5926679846″ thumbnail=”medium” overlay=”true” size=”medium” group=”” align=”none”] What is the Big Mac Index? “Big Mac Index”, a guide showing how far from fair value different world currencies are. The Big Mac theory (a.k.a. purchasing-power parity, or PPP) says that exchange rates should even out the prices of Big Macs sold across the world.