When this index exceeds the rate of return earned on equity by the business, the investor's purchasing power (real capital) shrinks even though he consumes nothing at all.
当这个指数超过企业的资本回报率，投资者的购买力(真实资本)缩小为零，即使他没有消费任何东西。
And the cost of equity capital is the minimum rate of return the request to common stock shareholders.
而权益资本成本是普通股股东要求的预期报酬率。
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