Final answer:
To create a portfolio equally as risky as the market, you need to calculate the investment amount for each stock based on their betas. The amount to invest in Stock C would be $200,000.
Step-by-step explanation:
To create a portfolio equally as risky as the market, you need to invest a certain amount in each stock based on their betas. Beta measures an asset's sensitivity to market movements. In this case, Stock A has a beta of 0.80, Stock B has a beta of 1.25, and Stock C has a beta of 1.40. To calculate the investment in Stock C, we can use the equation:
Investment in Stock C = Total investment amount * (Stock C beta / Sum of all stock betas)
Plugging in the values, Investment in Stock C = $500,000 * (1.40 / (0.80 + 1.25 + 1.40)).
So, the amount you would invest in Stock C is $200,000.