牛校出来的都去做教授了，华尔街的工作怎么会有人看得上？烂校出来的才有很多转行去华尔街。偶同学里不少是没办法才去华尔街的。只要你不想做教授，其他都好办。不过如果真的不喜欢做物理，不如现在就转专业，省得浪费时间。或者念个硕士就走人，找工作去。如果因为没办法才继续念物理，那不如边念边选其他的课。其实，只要你把研究做好，以后出去找工作会更有利。美国人重视能力，不重视资历。一个硕士证书不过是张纸，如果你自己的博士论题做的很烂，那个硕士证书根本没用。除非，你找工作时根本不提你的物理博士，不过美国人也不傻，他们会查你的简历。。。。

none of those looks like physics to me:) sorry. granular material stuff looks like calculations, calculations and calculations, which means, you think of a model and put it on the computer to simulate, see if it anwers your questions, if not (which happens most of the time) then you modify the model (or think of a completely new one) simulate again.

biophysics, I don't know much. the only subject I ever touched is protein folding, which is also mostly computer simulation.

if mm don't mind building on models and similating on computer all the time, then both would be ok. personally, I would prefer to work on self-organization models, or neuron simulations (how your brain works)which is very hot these days. biophysics is not traditional physics, but it's definitely physics and may input new principles to physics society about how science should be done.

don't be fooled by the high salary from wallstreet, its job is very unstable, you can be fired anytime and they don't have to inform you in advance, they can just fire you and give you 2 hours to clean you desk, then you are gone. some of my classmates who work there really work like hell because they are afraid of being fired. If you don't mind die early, then transfer to finance or economy or computer, get a master and find a job in wallstreet:) btw, after subtracting the high living cost in NY NY, your salary is really low.

personal bullshit. don't trust me:) mm should read more of the related research papers and really find out what you love most(forget about the job oppotunities, it's too early to worry about that), because the only thing we can do better than everyone else is the thing we love the most. If you are not better than everyone else, you cannot find an academic job.

No free lunch.

if you don't like hard work, then try statistics, accouting which will land you a job of <$60,000 /yr, and somewhat stable (meaning they have to inform you 3 months in advance if they want to fire you). A master would be enough.