"Portfolio Management":Formula of portfolio risk

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Questions 1:

A portfolio contains equal weights of two securities having the same standard deviation. If the correlation between the returns of the two securities was to decrease, the portfolio risk would most likely:

A、 increase.

B、 remain the same.

C、 decrease.

Questions 2:

Information for Stock A and the market appear in the following table:

The beta of Stock A is closest to:

A 、1.70.

B、 2.35.

C、 0.43.

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