SEOUL :South Korea's Hyundai Motor Group said on Monday that it has signed a memorandum of understanding with Posco Holdings for cooperation on its planned U.S. steel plant. Posco will make an equity investment in Hyundai Motor Group's steel factory project in Louisiana, the group said in a press release. The steelmaker was also considering selling some of the steel to be produced from the factory. Production is slated to begin in 2029. The South Korean automaker announced plans to invest $21