``African economies can expect exchange rate pressures and volatility to persist for some time. Shifts in commodity prices as well as in portfolio and other private capital flows are likely to continue given the highly uncertain trajectory of the global recovery, the geographic rebalancing of trade flows, and volatility in the exchange rate of the main currencies,'' the IMF said after an analysis of the evolution of exchange rates of sub-Saharan African currencies in the context of the global financial crisis.
'Exchange rate pressures will persist'