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We are also looking into Ontology based approaches which can support much richer relationships between concepts. The work of FIBO is important in this context.
Based on types of securities
Bonds
Equities
Repos
Derivatives
Add mini bonds, green bonds.
Based on securities life cycle:
Securitization-Issuance-Pretrade-Trading-Settlement-Hedging-secondary Trading-Market making-Risk Calculations-Custody-Corporate Actions-Expiry/Maturity/Bankruptcy
A diagram from Oliver Wyman's Blockchain in Capital Markets shows an idealized view of Capital Markets