Consider a hypothetical investment management firm, WealthGuard, which manages a diversified portfolio for a high-net-worth client, Sarah. Given the current macroeconomic environment characterized by rising inflation, potential interest rate hikes, and geopolitical instability, the firm's chief investment officer (CIO) is contemplating an adjustment to the portfolio's asset allocation strategy. The CIO is considering a tactical asset allocation (TAA) approach to adjust the weightings of equities, fixed income, and commodities based on short-term market forecasts.
In your response, address the following:
Support your analysis with relevant financial theories and frameworks, such as Modern Portfolio Theory and behavioral finance insights.