Jacob Frenkel, chairman of JPMorgan Chase International, tells CNBC monetary policy and fiscal policy have exhausted their capabilities and now the key focus should be on structural economic policies.
Simon Cox, Asia Economics Editor at The Economist says finance ministers and central banks should be fighting stagnation, not each other. He's joined by Michael Hewson, Senior Market Analyst at CMC Markets who says the weakening yen is justified.
Uwe Parpart, Managing Director, Head of Research at Reorient Financial Markets says Japan has a legitimate case to fight against deflation which will bring down its currency.
Roberto Nicastro, general manager of Unicredit, tells CNBC he expects the issue of inconsistent regulation across the countries to be addressed at the G20.
Ksenia Yudaeva, Russia's G20 Coordinator, tells CNBC that currency wars are about transparency and co-ordination of monetary policy between different countries.
Claudio Piron, Head of EM Asia Rates Strategy, BofA Merrill Lynch Global Research says upcoming Spanish bond auctions and the euro zone group meeting this week will continue to threaten the euro.
Ian Bremmer, President at Eurasia Group says to expect more conversations between major central banks at the G20 meeting.
Concerns over the size of United States debt reared their head once again as ratings agency Standard & Poor’s warned that health care costs for a number of highly-rated Group of 20 countries, including the U.S., could hurt growth prospects and harm their sovereign creditworthiness from the middle of this decade.