PnL Attribution

Decompose a strategy's return by asset, sleeve, and market regime — where the PnL actually came from

Purpose: a total Sharpe tells you how, attribution tells you why. See which sleeve (equities / bonds / gold) added value, whether the return was earned in calm regimes or bled in stress, and which individual tickers drove it. This is the "which sleeve/regime added value" layer of the continuous-reinvention loop.