Performance metrics are quantitative measures used to evaluate the effectiveness, profitability, and risk characteristics of trading strategies and investment portfolios. These metrics provide objective criteria for comparing strategies, optimizing parameters, and making informed investment decisions.

Comprehensive performance analysis requires multiple complementary metrics that capture different aspects of strategy behavior: returns, volatility, drawdowns, consistency, and risk-adjusted performance. No single metric tells the complete story.

Modern portfolio management relies on sophisticated performance metrics to balance return optimization with risk management, enabling traders to develop robust strategies that perform consistently across different market conditions.