Brazilian and Argentinian bonds? Talk about Banana republics. As I recall both of those countries have had hyperinflation, defaults, currency changes, military dictatorships, and any other way that one can fold, spindle, or mutilate a fiat currency. I think one time one of those countries fixed their inflation by lopping 3 zeros off the peso or whatever they use.
One would have to have balls of titanium or a brain of hashbrowns to buy bonds in a Banana republic. Admittedly I know little about the current situation, very low on my list of priorities.