Trading giant Glencore extends major Libyan oil deal - sources

By Julia Payne and Ahmad Ghaddar LONDON (Reuters) - Swiss-based commodities giant Glencore has extended a deal with Libya's state oil firm to be the sole marketer of one third of the country's current crude oil production, sources familiar with the matter said. It was not clear for how long Glencore would continue to have exclusivity over the output and whether some parts of the deal would be renegotiated. The deal extends Glencore's dominance over rivals such as Vitol and Trafigura in handling