Luigi Zingales, University of Chicago Booth School of Business Professor of Finance says the banking system can't operate with interest rates at 4%. Thierry Wizman, Macquarie Global Interest Rates and Currencies Strategist says it's the "speedy, aggressive and abrupt increase" to 4% rates that is the problem. Julie Norman, UCL Centre on US Politics Co-Director says Europe's more open-handed approach to China could be an advantage for the US. Carl Riccadonna, BNP Paribas Chief US Economist, Markets 360 says there's some progress on the inflation fight.