Question

When the stock price follows a random walk the price today is said to be equal to the prior period price plus the expected return for the period with any remaining difference to the actual return due to:_________

a. A predictable amount based on the past prices.
b. A component based on new information unrelated to past prices.
c. The security's risk.
d. The risk free rate.
e. None of the above.

Answer 1

e. None of the above.

Step-by-step explanation:

When the stock price follows a random walk the price today is said to be equal to the prior period price plus the expected return for the period with any remaining difference to the actual return due due to new information related to the stock​". This is because any new information on stock which is unrelated to stock prices will lead to an increase/decrease in the stock price over a period of time.