Mercury rules lot of things besides communication. Mercury is one planet which is almost connected with each job or profession, because anything you do you certainly need communication in it. Mercury rules IT, engineering, Media, accountancy etc. It rules E-commerce. It rules banking – now banking is account and finance only. Communication is a big part of every job. In your D10 chart your 11th house is ruled by Venus , Venus is anything related to money. The strength of both Mercury and Venus in your D10 charts indicate success in MBA – Finance.