# Indexing

- [Bitcoin Halving](/glossary/indexing/bitcoin-halving.md)
- [Sharpe Ratio](/glossary/indexing/sharpe-ratio.md): Derived by William Sharpe in 1966
- [Sortino Ratio](/glossary/indexing/sortino-ratio.md)
- [Ordinals](/glossary/indexing/ordinals.md)
- [Security with Web3](/glossary/indexing/security-with-web3.md)
- [Survey](/glossary/indexing/survey.md): cryptocurrency
