Africa currencies: Is a currency storm on its way?

Emerging markets have seen tough times in the last year or so. After a long run of growth, the big emerging economies are now feeling the sharp end of the confidence cycle. Up to now Africa has done better than many other emerging markets, but for Africa too, things are changing, and not necessarily for the better. In fact, sub-Saharan Africa has the makings of a currency crisis. Analysis by Richard Walker.