Squawk Box (Europe)

David Hauner, head of EEMEA fixed income strategy and economics at BofA Merrill Lynch, told CNBC, "Greece would probably be locked out of the market for a significant period of time, if you look at the history of how long it took the sovereigns in these emerging markets to get back to the market it took between one and 15 years"

Scott Button, founder & CEO of Unruly Media, told CNBC, "The Facebook stock certainly didn't feel underpriced, a lot of people were hoping that would pop, retail investors were hoping that would pop, there is an enormous amount of future growth that is already priced into that market cap."

Marcus Grubb, managing director of investment at the World Gold Council, told CNBC, "There were a number of negatives in the first quarter but I think they were offset by the positive which was why gold demand was only down by about five percent in tonnage terms but some of the investment categories were very weak."

Michael O'Leary CEO of Ryanair, told CNBC, "We think next winter is going to be very tough, oil prices are up there is general sentiment across Europe of recession and austerity. It is good for our business we will go strongly but the yield environment will be difficult and hard to compensate for much higher oil prices."

Amr Moussa, Egyptian presidential candidate, told CNBC, "I would certainly do that (pursue a loan from the IMF) and I hope that this current government will do all the preparations and necessary groundwork to have this deal signed very soon. It will be done, it has to be done."

Brendan Brown author of 'Euro Crash', head of research at Mitsubishi UFJ Securities International, told CNBC, "What we saw at the G8 meeting was a essentially Germany being asked to write a check for the Obama reelection campaign, clearly the US concern is that Europe doesn't blow up ahead of the November elections."

"Greece's exit from the euro is being assumed rather than thought of as a remote possibility. I think one has to decide whether that is damnation or salvation for the Euro," John Haynes, head of research at Investec Wealth and Investment, told CNBC.

Andre Loes, chief economist for Latin America at HSBC, told CNBC why the bank has lowered its 2012 growth forecast for Brazil.

The euro zone is facing its darkest hour but will emerge more competitive than in the past, Xavier Rolet, chief executive of the London Stock Exchange told CNBC.