Performance Attribution Builder

Build and reconcile a single-period performance-attribution analysis: decompose a portfolio's active return (portfolio minus benchmark) into allocation, selection, interaction, and currency effects by segment using arithmetic Brinson-Fachler, roll the effects up by currency, reconcile the bottom-up return to the official book-of-record return, document the methodology, run QA tie-outs, and assemble a source-linked draft for analyst and portfolio-manager review. Use when a performance analyst or portfolio manager asks to build, refresh, or QA attribution, explain what drove active return, decompose allocation vs selection vs currency, or reconcile attribution to the offici…