MBAs does not need formal training in banks?

Answer 1

The question is a little vague.

Do people holding an MBA degree need formal training in banks?

Yes. Every organisation needs to train its people in order for them to successfully complete tasks assigned. Most organisations, though the job title may be the same - the actual job description may differ thus the need to train staff in order to ensure they deliver. And banking is no different. A person fresh out of University with a MBA degree still cannot be expected to work the banking system of doing basic telling unless he/she is trained. An MBA does not guarantee you the necessary skills to acquire the knowledge of work, it just enhances your ability to become a future leader and have the necessary skills to make the correct decisions for the company.