Portfolio Analytics

December 2, 2025 Correlation measured using trailing returns is volatile and backward looking Many investors measure diversification via historic return correlation, which is itself correlated to volatility. When incorporated into portfolio risk metrics such as VaR, it can encourage selling amidst panics and buying amidst complacent booms. VecEvent based correlation is more stable and very […]

December 2, 2025 Correlation based on historic returns is arbitrarily calculated and ignores price context How long should the lookback window be? What periodicity of returns should be used? Such questions confront anyone using Pearson correlation of historic returns to estimate portfolio risk. Results can vary significantly depending on the choices made. What doesn’t matter