Daragh Maher, HSBC Securities Head of Research Americas & Head of FX Strategy, says this is a really tricky time for central banks. Mandy Xu, Credit Suisse Securities Chief Equity Derivatives Strategist, says there is a risk the Fed is about to embark on a policy mistake. Simona Mocuta, State Street Global Advisers Chief Economist, says the retail sales data doesn't help solve the inflation question. David Rubenstein, Carlyle Group Co-Founder and Co-Chairman and Host of "The David Rubenstein Show: Peer-to-Peer Conversations," discusses his interview with U.S. Special Envoy for Climate John Kerry.