> ## Documentation Index > Fetch the complete documentation index at: https://docs.chicago.global/llms.txt > Use this file to discover all available pages before exploring further. # Investment Terms Glossary > Essential investment terminology and concepts for understanding quantitative investing, factor strategies, and portfolio management A comprehensive guide to key investment terms and concepts used throughout the Parallax platform and in quantitative investing. These are the standard terms you'll encounter in portfolio reporting, performance analysis, and investment strategy documentation. **Understanding Risk Measurement**: No single metric captures all dimensions of portfolio risk. Each measure provides a different perspective, and together they create a comprehensive picture of portfolio characteristics. ## Risk-Adjusted Performance Metrics that evaluate returns relative to risk taken. Excess returns vs. benchmark - measures value added beyond market movements Return per unit of total risk - the gold standard for risk-adjusted performance Active return efficiency - measures consistency of benchmark outperformance Return per unit of systematic risk - best for well-diversified portfolios ## Risk & Volatility Measures Quantifying uncertainty and downside potential. Market sensitivity - how much your portfolio moves with the market Return dispersion - measures how much returns jump around Asset co-movement - whether investments move together or independently Peak-to-trough losses - the worst decline you'd experience ## Portfolio Construction Building and managing portfolios. The only free lunch in investing - reducing risk through variety Systematic approaches targeting proven return drivers Company size measurement and why it matters Maintaining target allocations over time ## Investment Strategies Approaches to selecting securities. Riding trends - recent winners tend to keep winning Buying stocks for less than they are worth Price fluctuations and market uncertainty Evaluating performance relative to risk taken ## Advanced Analytics Sophisticated portfolio analysis techniques. How closely a portfolio follows its benchmark Frequency of benchmark outperformance Measuring forecasting skill How much factors explain returns True skill after removing factor exposures ## Fundamentals Core investment concepts. Measuring investment gains and losses Standards for measuring performance Dividing your portfolio among asset classes ## Investment Approaches Systematic and quantitative methods. Data-driven, systematic investment approaches Rules-based approaches to investing ## Islamic Finance Shariah-compliant investing principles and terminology. Islamic law framework governing permissible investments Investments that comply with Islamic principles Prohibition on interest and usury Cleansing non-compliant income through charity *** Explore each term to understand both the intuitive meaning and the technical details behind these essential investment concepts.