Kuwait Finance House (KFH) has ruled out a sale or merger for its Malaysian unit, its chief executive said on Tuesday. Mazin al-Nahedh added the lender, the largest Islamic bank in the Gulf Arab state, will begin restructuring the unit with immediate effect. The disclosure from KFH comes after a source familiar with the matter said last week that Qatar National Bank had bid to buy the unit, with the Qatari lender later acknowledging it was in early talks about an acquisition.