Full coverage: G20 Hangzhou Summit

The International Monetary Fund's chief economist says policy makers don't need to tame the forex markets. 

Economist Maury Obstfeld says the flexible exchange rates have been a buffer to such shocks as the Brexit vote.

Obstfeld says the foreign exchange markets are not disorderly and provides important price signals that guide economic activity.

Several currencies have fallen sharply against the US dollar since the Brexit referendum but the IMF economist says there's no need to intervene in the volatility.

Obstfeld spoke ahead of the Group of 20 finance ministers and central bankers' meeting this weekend that IMF chief Christine Lagarde will attend.