Abu Dhabi and hedge funds to back Glencore IPO

``An Abu Dhabi vehicle, big hedge fund managers and Swiss private banks are set to serve as "cornerstone" investors backing commodity trader Glencore's $12 billion (7 billion pound) flotation, a person familiar with the matter said. The listing, which could be London's biggest ever, will be aided by strong support from cornerstones, who could buy nearly 30 percent of the shares sold -- or some $3.6 billion worth, if the listing raises its maximum target of $12.1 billion.''