<p>Mathematics is just about instantly employable, especially if you go to a school that offers a math with econ specialization. I know several people who recently graduated UChicago with that, and had their pick of banks and funds to work for - assuming that kind of thing is for you.</p>
<p>A mathematics undergrad mixed with just about anything is very very good. I’d recommend minoring in what your masters is in though as to prep you for grad school. CS is good, but far more narrow. Everyone wants a math major.</p>