Formula and reference shelf

This shelf organizes independent formula explanations, variable conventions, assumptions, edge cases, and reproducible checks.

Start here

• Calculator lab — browser-based educational calculations.
• PureAlpha Wiki:Formula sandbox — contributor examples for inline and display mathematics.
• Quantitative methods — probability, statistics, inference, regression, simulation, and model risk.
• Fixed income — discounting, yields, duration, convexity, and credit measures.
• Portfolio management — return, risk, diversification, allocation, and performance.

Publication contract

Every formula page must state its source, define every variable and unit, identify timing and sign conventions, show at least one independently checked example, cover edge cases, carry test evidence, and disclose whether the formula is exact, approximate, model-dependent, or convention-dependent.