PhD is a terminal degree in US. You can't earn any other PhD after this doctorate of philosophy (or DBA) that requires you to complete the same level of work and have your research published by peer-reviewed journals or presented at conferences. There are several schools with MBA/MSF programs where I know many students enroll on an OPT， so they don't need F1 status for their courses as it will be considered short term study program.
There may not be much difference between these 2 tracks but MSFs tend cost less than MBA while being more flexible due to part-time enrollment， which means fewer hours per session. They won't require GRE scores if you have GMAT because they do not take into account GPA from undergraduate institutions（the minimum requirement）in admissions process. All applicants must possess at least one year experience working full time in finance industry prior to applying， and all candidates who wish to apply for OPT positions should have a valid employment offer with sponsor approval letter provided by prospective employer upon acceptance notification.
For those whose interest lies only on earning money right away， master’s degrees like MSF(Master of Science Financial Engineering) would serve better； For people seeking career change， EMBA(Executive Master Of Business Administration )with specializations in fields such as accounting management、entrepreneurship development etc also deserve consideration too！
