Final answer:
Using the dividend discount model with dividends of $4.50 per share and a cost of capital of 10%, Northsea Inc.'s stock is valued at $45. However, a change in dividend policy to retain earnings and reinvest at a 12% return rate would likely increase the value of the stock in the future.
Step-by-step explanation:
The student asks how to value Northsea Inc. stock using the dividend discount model. When a firm is expected to pay out all its earnings as dividends indefinitely, the stock value can be calculated using the formula P = D / r, where P is the stock price, D is the dividend per share, and r is the cost of capital. Since Northsea's earnings per share (EPS) is $4.50 and it pays out everything as dividend, D is $4.50. Given the cost of capital (r) of 10% or 0.10, the stock price (P) is calculated as $4.50 / 0.10, resulting in a stock price of $45.
However, once Northsea changes its dividend policy to retain 30% of earnings, the future dividends will grow as the retained earnings are reinvested at a rate of return of 12%. This change is likely to result in a higher future stock price due to the expectation of increased future dividends, driven by the reinvestment of earnings at a rate higher than the cost of capital.