Estimating the cost of equity is more difficult because companies do
not explicitly agree to pay their common shareholders any particular
rate of return. Nonetheless, investors require an implicit rate of return,
or hurdle rate, to purchase or to hold a company’s shares.
Rational, risk-averse investors expect to earn a rate of return pro-
portionate with the risk they assume. Risk is, after all, the price that
investors pay for opportunity. What rate of return is necessary to induce
investors to buy a company’s shares? One logical starting place is the
how the market values stocks 29
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