BANKING NATIONAL Australia Bank plans to expand its UBank arm through the $220 million acquisition of fintech 86 400. NAB plans to lift its 18.6% stake to 100% through a scheme of arrangement that will require approvals from regulators, including the Australian Competition and Consumer Com-mis-sion. It is understood the ACCC will scrutinise the deal but has not ruled out the idea of big-four banks acquiring smaller competitors. NAB said upon completion of the acquisition it would merge 86 400 into its online bank platform, UBank.