The G20 is being held in St Petersburg , but focus will be on tensions between Vladimir Putin and Barack Obama . Comment: During the height of the 2009 financial crisis , when there was a real and present danger of banks seizing up due to a lack of liquidity , the then-British Prime Minister Gordon Brown altered the geopolitical architecture . Emerging markets have been suffering as demand for commodities drop , and currencies have collapsed . John Defterios writes the G20 has become an unwieldy group of countries with different priorities .
The G20 is being held in St Petersburg , but focus will be on tensions between Vladimir Putin and Barack Obama . Comment: Emerging markets have been suffering as demand for commodities drop , and currencies have collapsed . John Defterios writes the G20 has become an unwieldy group of countries with different priorities .