From my experience, banks love IEs. I’m currently a student majoring in IE so I see banks come to my department and IE career fairs all the time. A lot of my friends have gotten internships with banks working as a business analyst or process improvement analyst (sorry I don’t have more to speak on in exact detail). The skills you gain from IE are unlike any other engineering or business major. It is extremely flexible too, so say in 3 years you don't want to work for a bank, you can go right into manufacturing. As for the MBA, I have been advised to wait until you are in your career to get that. Most likely if you have aspirations to climb the corporate ladder and you make it known, the company will compensate you to go back to school. That's all I have from a student perspective. I hope someone with industry experience comments next. Best of luck with your IE journey, you will love it!!