Use Investment Bank Report as Reference?
Citing grey literature, such as investment bank reports, isn't unheard of.

There are a few caveats.


Discuss it with your supervisors early on: they will know the whens and hows of acceptable grey-literature citations.
It may not be easy to find useful citation metadata such as named authors.
Your reviewers / examiners may not be able to accesss the report, and that would be problematic for them, and thus for you.
You should not build arguments that are grounded only in grey literature. Corroborate with peer-reviewed literature wherever possible, even if it's just corroborating one aspect of the points you're taking from the grey literature.
Business reports often have some wacky form of encryption that hinders text searching, which can make including them in your literature review somewhat hazardous.