Global Infrastructure Partners (GIP) is in talks to buy up to a 49% stake in MMC Port Holdings, in a deal potentially valuing Malaysia's biggest port operator at around 30 billion ringgit ($6.4 billion), two sources with knowledge of the matter said. The infrastructure investor has begun seeking financing for the potential acquisition of a stake in MMC Port, part of the MMC Corp conglomerate controlled by Malaysian tycoon Syed Mokhtar Al-Bukhary, one of the sources said. A 49% stake in MMC Port would be worth $3.1 billion, although it is not clear yet what kind of premium will be agreed on by the two companies.