Portfolio Drift
Portfolio drift is the deviation of an investment portfolio actual asset allocation from its intended target weights due to market price movements. When certain assets outperform others, their relative weight in the portfolio increases, potentially leading to unintended risk concentrations.
If left unchecked, this drift can cause a portfolio to become overly exposed to a single asset or sector, contradicting the original investment thesis. Portfolio drift management is a critical component of risk control, often addressed through periodic rebalancing or automated rebalancing protocols.
Monitoring drift is essential for maintaining the desired risk-return profile and ensuring that the portfolio remains aligned with the investor's long-term financial objectives.