Congratulations and thanks for posting!
HKUST is a pretty impressive school. Their professors, facilities, and program are ranked well and the best in HK. Pretty much all second-year students taking a second year first semester somewhere overseas. That's a great opportunity to travel though is a bit hard on recruiting and job logistics since you will have only 4 months after landing back in HK to land a job. The geography of employment based on the latest numbers seems to be 36% HK and 24% china - that's 60% of grads, which is good since 90% of students are international (it used to be 80% placement outside of HK).
Anyway, I am taking a while to make my point, while HKUST is the better school and I like HK better than Singapore (sorry), a lot is driven by potential employer outlook - it seems that a lot of the opportunities in Finance are in Singapore still. I have not been back to Hong Kong in a while but I can't see China making things better in the long term either. Also, this article from 2014 seems to indicate Singapore is still the place to be for Finance:
https://www.ft.com/intl/cms/s/0/b18372a6 ... z46sRL65FWAre you looking to be in HK or China after graduation? If not, then NTU is probably going to make it easier to place in Singapore where you already have work authorization. What about HK- how easy is work permit there? Waseda is a cool idea but not sure how helpful it will be to study in Japan the last trimester when you need to be interviewing and looking for a job in Singapore. Do you have a connection with any current students to find out how it is really working out?