CV problems (had in internship in commercial bank treasury)

HI,
I am struggling to write something about my work experience , I had an internship in a commercial bank in the treasury department. I barely did anything and was not assigned any great tasks. I don't know what to write as work experience in my CV and i'm near the deadline to apply to M&A internships here in Germany.
Are there any treasury analysts here , could you help describe your tasks and day to day work so I can get some insight?
thx in advance