Dear Ananya, Investment banker has a different profile in different organisations. And every Investment Banker gets paid monthly. While the salary package is quoted per annum, they do get paid monthly. And then there is the bonus that is attached to every succesful deal. This is paid based on the company's norms. 

Unless you provide the source of information we cannot tell whether it is per month or per annum you need to just check where you read the information to get to know whether it is an Vellore monthly.let you didn't mentioned anything regarding where you have read information and what information did you read.