| Abbreviation | Definition |
|---|---|
| SIP | Standard Investment Planning |
| SIPC | Securities Investor Protection Corporation |
| SIPP | Self Invested Personal Pension |
| SIR | Select Income REIT (Real Estate Investment Trust) |
| SIR | Statement of Intent to Register |
| SIS | Share In Savings |
| SKQ | Seacoast Financial Services Corporation Options |
| SKU | StockKeeping Unit |
| SL | Securities Lending |
| SLAB | Stock Lending And Borrowing |
| SLB | Securities Lending and Borrowing |
| SLBS | Security Lending and Borrowing Scheme |
| SLTA | Simulated Live Transfer Agent |
| SLY | Safety, Liquidity, And Yield |
| SMARTS | Securities Market Automated Research Training and Surveillance |
| SMFCE | Sibiu Monetary - Financial and Commodities Exchange |
| SMFT | Stock Market Forecast Tools |
| SMILE | Swiss Market Index-Linked Issue |
| SML | Security Market Line |
| SML | Standard & Poors Small Cap 600 Index |