Sunday strategist: how Saudi Aramco boosted its IPO price

Saudi Aramco have managed to reach their $2 trillion target. But how? After the failure of their initial attempt at going public, Saudi Aramco has decided to change tactic, decreasing the volume of shares and selecting enthusiastic investors. Peter Coy writing in Bloomberg Businessweek explains why this has made the world's most valuable publicly-traded company, but could violently backfire.