How much does your minor matter?

Not worth it to me unless you’re actually interested in those fields and what you’d learn (which in that case go for it). Otherwise would focus my time on networking and preparing for OCR. Never cared about someone’s minor including my own which was a joke to get. Just my $0.02.

Obviously not an expert, so take it with a grain of salt. I do not think banks care about your minor. If you love either math or comp sci, and you are really good at it, then go for the minor. It is not going to help you anyway with recruiting, if you were concerned about that. 

minor does not matter

Doesn’t matter at all. Minor in something you’re interested in. If you like it you will talk about it better in interviews and seem 3 dimensional.

Matters only as far as you're interested in it. 

your school matters much more than your major/minor

Not at all. If your minor will hurt your GPA, drop it unless you're really interested in the subject.

A finance major who takes easy electives with a 3.9 will get far more interviews than a math/comp sci minor with a 3.6... just the way IB recruiting works, heavily dependent on GPA and not at all on course load

Computer Science minor helped me during the most recent recruitment cycle, but a majority of compsci courses incorporate finance topics into them. If you could make a case for how it would help on the job and you have an interest why not minor in it, if not then there really isn't a point just as others have said, focus on networking, ocr, etc.

It doesn’t