India's ISIN Dataset

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Somehow I’d never seen the CSV from the NSDL website :man_facepalming:. There are some differences however:

  1. The official CSV contains a few undocumented prefixes that I hadn’t seen before (INY, IN5-9) so that adds some 7k odd ISINs. These can be accounted for fairly easily.
  2. My dataset does include Expired/Blocked/Suspended ISINs, so that’s one important difference as you pointed out.
  3. The official CSV doesn’t include the majority of Government Securities (even active ones). For eg IN4920200099. My dataset has roughly 4.5k active Government Securities, so this might be an important difference for now.
  4. The official dataset does include pricing information, so it might be worth incorporating regardless.

Nevertheless, here’s one github.com/captn3m0/india-isin-data/pull/9 :wink:

Thanks, merged