Lenders to ABG Shipyard Limited (BSE:532682) are in talks with an investor to sell a majority stake in India's largest private shipbuilding company as part of the strategic debt restructuring (SDR) invoked by them in December 2015, according to two bankers familiar with the development. "There are not too many buyers that have come up for this stake buy as the shipping sector is presently going through a tough period. We are in talks with a financial investor from Vietnam for a majority stake sale," said one of the bankers cited above, requesting anonymity as the talks are confidential.