Master's Thesis topics in quantitative finance?

Hi all,

Starting to conduct my master's thesis in the spring of 2019. My background is in MSc Finance (afer the thesis), with minor in computer science. So I have some experience in math and programming and quantitative finance (couple of courses), however consider myself as a beginner in this field. My goal would be to learn as much as possible by doing my thesis, however it would be nice if it would have some scientific value at the same time.

Any ideas, what would be a suitable topic for someone interested in quantitative finance?

Would it be wise to examine some phenomenom in financial markets with the tools of mathematical finance? Or how should one approach this?

Thanks in advance for any help!