Return Calculations Purpose This skill enables Claude to compute, explain, and compare investment return metrics across different methodologies and time horizons. It covers the full spectrum from simple holding-period returns through time-weighted and money-weighted returns, ensuring the appropriate metric is selected for each analytical context. Layer 0 — Mathematical Foundations Direction retrospective When to Use - User asks about calculating investment returns - Comparing returns across different time periods - Understanding arithmetic vs geometric vs log returns - Computing CAGR, TWR, MW…