身边的经济学·社会常识英语30篇（2）

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分散投资与相关性直觉误区

Investors often assume assets from different countries or sectors move independently.
But during global crises, correlations between stocks, bonds, and commodities can spike suddenly.
This undermines diversification’s risk-reduction promise when it matters most.
Historical averages mislead if future conditions differ structurally from past ones.
Adding real estate or infrastructure may help only if their cash flows truly differ.
Behavioral finance shows people underestimate how much markets sync up under stress.
True diversification requires analyzing underlying drivers—not just labels like 'emerging' or 'tech'.
Rebalancing portfolios annually helps maintain target risk exposure despite shifting correlations.
Stress-testing models now incorporate tail-risk scenarios to expose hidden linkages.
Smart diversification means expecting correlation surprises—not ignoring them.