| Abbreviation | Definition |
|---|---|
| SIA | Securities Industry Association |
| SIAC | Securities Industry Automation Corporation |
| SIAD | Statistical Information Analysis Division |
| SIB | Securities and Investment Board |
| SIBE | Interconnected Stock Market System |
| SIC | Standard Industrial Classification |
| SIC | Super Innovative Concept |
| sic | thus [Lat. thus] |
| SICAV | Société d’Investissement à Capital Variable |
| SICAV | Société dInvestissement à Capital Variable |
| SICOVAM | Société Interprofessionelle pour la Compensation des Valeurs Mobilières |
| SID | Super Intelligent Design |
| SIDA | Sensing, Interpreting, Deciding, And Acting |
| SIE | Simple Innovative And Effective |
| SIE | Simple, Innovative, and Effective |
| SIEX | Superintendencia de Inversiones Extranjeras |
| SIFR | Stockholm The Institute for Financial Research |
| SIG | Special Interest Group |
| sig, | signature |
| SIGMA | Sustainability Integrated Guidelines for Management and Associates |