I guess you've been employed for some time? If you want to go to graduate school and the goal is employment, then don't consider quantity. Direct election statistics. At least this major is that big data is widely used now, and second, you will master basic skills (such as R language). You may not know what direction you want, and it is very likely that the skills and knowledge in both mathematics and the direction you want to apply are only half a bucket of water. At the same time, it is not easy for most people to study mathematics in college, not to mention that most of them really study mathematics (don't simply understand calculus, at least undergraduate mathematical analysis will be difficult for many people, not to mention PDE and convex analysis that graduate students have to learn). Many people choose math major because they are good at math in high school and then regret it. I don't know anything about finance, but I advise you not to choose a math major just because others say that it is easier for students studying mathematics to master finance and economy. What I do in Chengdu is because my ability has reached the corresponding level, not because I chose a certain major. Views are for reference only, and the key is to look at your actual situation.