Portfolio betas for an industry are usually higher than the beta of individual stocks in that same industry.

Name: Portfolio betas for an industry are usually higher than the beta of individual stocks in that same industry.
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Portfolio betas are typically an average of the betas of the individual stocks within the portfolio, and diversification tends to reduce the overall risk, often resulting in a portfolio beta that is closer to the market average rather than higher than individual stock betas.

Portfolio Betas for an Industry Are Usually Higher Than the Beta