Harbin Manufacturing has 10 million shares outstanding with a current share price of $ 21.31 per share. In one year, the share price is equally likely to be $ 30 or $ 20. The risk-free interest rate is 6 %.
a. What is the expected return on Harbin stock?
b. What is the risk-neutral probability that Harbin's stock price will increase?
a). Expected Price in next year = [0.5 * 30] + [0.5 * 20]
= 15 + 10 = 25
Expected Return = [P1 - P0] / P0
= [$25 - $21.31] / $21.31 = $3.69 / $21.31 = 0.1732, or 17.32%
b). Up factor = Price in the up state / Current Price = 30 / 21.31 = 1.41
Down Factor = Price in the down state / Current Price
= 20 / 21.31 = 0.94
Risk-neutral probability = (1 + risk free rate - down factor) / (up factor - down factor)
= (1 + 0.06 - 0.94) / (1.41 - 0.94)
= 0.1215 / 0.4693
= 0.2589, or 25.89%
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