For much of the history of the stock market, investing was primarily about individual stocks and bonds. Over the past few decades, however, macroeconomic developments have increasingly influenced markets. Significant events, whether related to central bank policy, geopolitics, or global trade, now affect nearly all stocks across the market, regardless of their individual stories. For investors, this means that building modern portfolios is less about finding attractive stocks, and more about making asset allocation decisions that are aligned with financial goals.