Steven Koltai, CEO of Koltai & Company

Companies around the globe are trying to big up their brands on sites like Facebook and Twitter. The research firm E-marketer says the social media advertising will be worth $10 billion next year. But Ed Keller, Chief Executive of the consulting firm Keller Fay Group, says advertisers should not put all of their eggs into one social media basket. He's also co-author of "The Face-to-Face Book", in which he argues that social media is not the king of the advertising hill.

The head of the European Central Bank, Mario Draghi, had pledged to do "whatever it takes" to save the euro. He fuelled expectations the ECB would take immediate action to stem the crisis. Instead, investors were left disappointed after the ECB's latest meeting and stock markets plunged on the back of it. To help us understand this latest twist in the debt crisis, Markus Karlsson talks to Ken Wattret, Chief Eurozone Market Economist at BNP Paribas.