Yeah, it will take a while for the rice dongs to figure out all of this world currency crap. Perhaps they are a little "short sighted"?
Vietnam market is very small and illiquid. The fact that you a few muscle hedge funds running and controlling the market or exiting or entering the market,,you will get volatility. or instability of the market. That is another reason countries have strict controls on foreign ownership of key industries and 'market rules'
I used my dong to make dollars once, I still feel the shame: http://www.planetgarth.com/lyrics/that_summer.php