Stanford University

Sorry to disappoint you my friend but it won't help much.
First of all for getting B Schools outside India you need minimum experience of around 5 years. Foreign B-Schools don't accept freshers. So first look into that. CFA (Chartered Financial Analyst) is certifications for those who are looking to get into money/asset management. If you are looking to work as an equity research analyst of portfolio manager and other such jobs then CFA can help. But again there are 3 levels of CFA. For it to be of any use you need to clear at least two levels then only you would have enough knowledge to work as an equity research analyst or other such jobs. So CFA alone won't help.
If you are already in finance sector and trying to change job or climb up the ladder then it may be a bit helpful. They will give lot of experience to your job experience as such. So do thorough research of requirements of the top B-schools and then make a well informed decision. There is no point doing CFA just for sake of adding something to your resume.

Hi, Stanford has the lowest acceptance rate that is the selectivity is very very strict ,so you have to be a exceptional student to be accepted by Stanford. You must not only excel in your studies but must be an allrounder. Aspirants generally prepare for these schools from middle school onwards. It's not easy but not impossible.So, prepare for the SAT or ACT and build extracurricular activities, take a gap if required.Very importantly read this and check what kind of students they admit and prepare accordingly
http://admission.stanford.edu/apply/freshman/index.html
Keep asking yourself why they should admit you and find and answer.This is what you have to write on your application as well.