Hey,
There are several courses that you can study after your Bachelors in Commerce(B.Com) are Master in Commerce(M.Com),Chartered Accountancy,
MBA,CFA,CPA,FRM,CMA.
After M.Com you can go for Doctorate studies in Financial Studies,Commerce,Statiatics etcetera;you can even go for studying International Finance Reporting Stabdards,Certificate Course in Banking,Stock Market,Derivatives,Income Tax,Company Secretaries studies,Chartered Accountance.
Hope this helps.
Good luck .

Here lets go with the courses available after B. Com. Go through the below list - 

• Chartered Accountant(CA)
• Masters of Commerce(M. Com.)
• Masters of Business Administration(MBA in Finance)

Lets go International - 

• Certified Management Accountant(CMA)
• Chartered Financial Analyst(CFA)
• US Certified Public Accounting(CPA)
• Financial Risk Manager(FRM)