How much valuable are the certification courses of NSE BSE NISM?

The certifications provided by NISM, NSE, and BSE are for educational purposes. They are valuable in the sense that it confirms your awareness about the particular segment.

Example: If you have cleared the NISM Series VIII exam, then it shows that you have enough knowledge about the equity derivatives segment and are qualified to be a dealer. But that is the extent of the matter. It does not certify that you know everything about equity derivatives.

• They are mainly useful to develop functional knowledge about stock markets in India. 
• It increases your understanding of how the markets work and hence improves your knowledge.
• These certifications are only useful for regulatory compliance purposes.

Like every course, it will teach you all the basics that you need to know. It will open up a lot of options. But practical knowledge and experience are always valued more than certificates.