Hi,

I am a very skilled and with loads of experience .NET C++ developer.

Unfortunatly I can't get into investment banking development roles as I lack the business knowledge.

What would you recommend me to study and at what university/training centre so that my CV would be considered for such positions? (it can be anywhere in the world but can't take longer than one month)

Thanks a lot in advance.

It is very unprobable that you'll find anything shorter than 1 month, what would significantly increase your chances on the job market.

If you want to spare your time try passing certificates like: CFA, FRM or PRM.