Mahindra & Mahindra is unlikely to increase its stake in RBL Bank unless theres a compelling reason to do so in line with the companys capital allocation guidelines, the companys top official said, seeking to assuage investor concerns on the tractor- to-technology conglomerate straying on the path to fiscal discipline, it embarked upon a couple of years ago. Since the announcement of the stake purchase by the company, M&M investors have lost Rs 1,32,00 crore.