Best ways to obtain a scholarship for a Masters in financial mathematics/ quantitative finance I am not a UK or US citizen but I would like to get a scholarship to study in a master program in either financial mathematics or quantitative finance. My GPA is around 3.65-3.7 but I will still like to study in the best school I can.

Are there any clear guidelines on how to increase one's chances of getting a scholarship in a subject like this to attend a decent school in the UK or US?
I can't answer for the US, but it is highly unlikely that you would get any sort of funding in the UK. Unfortunately UK funding is very hard to obtain (even for British students) and is, in any case, largely restricted to EU nationals. Further any Masters level UK funding is generally awarded as a precursor to a PhD. This is known as "1+3" funding. Good luck though!