If or when policymakers finally decide Greece should leave the euro, the exit could happen so quickly that "new drachma" currency notes might not be printed in time.
Shares in Facebook may have a hard time in the coming week if its lead underwriter stops supporting the stock and managers lower down in the IPO book decide to get out.
Apple and Samsung Electronics come face to face on Monday in mediation over a dispute in which the iPhone maker claims the Korean firm has copied some of its products.
The London Stock Exchange Group has reported profits up nearly a third, driven by the inclusion of its newly acquired index business and its clearing unit.
National Grid , Britain's biggest energy distributor, reported a 5% increase in full-year profits, in line with estimates, and said it was positive on its outlook for next year.
For commodities traders looking for a six-figure salary with a bonus of up to 300%, iron ore, the latest bulk commodity where spot markets have evolved, is the new pot of gold.
Greggs, Britain's largest food-on-the-go retailer, said underlying sales had been hit by the miserable weather, which has continued into May after the country's wettest recorded April.
Security firm G4S posted a rise in first-quarter revenues, helped by strong growth in developing markets, and said it expected to make further earnings progress in 2012.
Shares of Google and Apple are probably better long-term bets than Facebook, and investors would do well to skip its highly-touted IPO, Barron's wrote in its 14 May edition.
