German Chancellor Angela Merkel and other senior European Union (EU) officials last night called on Greece to shelve plans to quit the single currency and urged it to see out its austerity programme.
European equity markets have given up all yesterday's gains as investors remain on the back foot ahead of today's EU summit.
Facebook became one of the 25 largest companies in the US overnight after pricing its initial public offering (IPO) at $38.
Greece will stay in the euro despite on-going political instability as the potential economic fallout from its exit would significantly hit global markets, a fund manager has said.
David Cameron will urge eurozone leaders to "make up or break up" today as he fears the euro unraveling will further dent the British economy.