| Regression | R-Squared |
| Relative Strength Index (RSI) | Racketeering |
| Renewable Resource | Rate of Return |
| Repurchase Agreement (Repo) | Rational Choice Theory |
| Requests for Proposal (RFP) | Real Estate |
| Required Minimum Distribution (RMD) | Real Estate Investment Trust (REIT) |
| Retained Earnings | Real Gross Domestic Product (GDP) |
| Return on Assets (ROA) | Receivables Turnover Ratio |
| Return on Equity (ROE) | Registered Investment Advisor (RIA) |
| Return on Invested Capital (ROIC) | Roth IRA |
| Return on Investment (ROI) | Rule of 72 |
| Roth 401(k) | Russell 2000 Index |