EBK INVESTMENTS
EBK INVESTMENTS
11th Edition
ISBN: 9781259357480
Author: Bodie
Publisher: MCGRAW HILL BOOK COMPANY
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Chapter 11, Problem 1PS
Summary Introduction

Adequate Information:

Markets are efficient.

To construct:

What should be the correlation coefficient between stock returns for two no overlapping time periods.

Introduction:Correlation Coefficientis a measure of strength of relationship between the relative movements of two variables.

Expert Solution & Answer
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Answer to Problem 1PS

Hence, the correlation coefficient for two non-overlapping periods shall be zero.

Explanation of Solution

In efficient markets, prices of securities quickly adjust to any new information that arrives in the market thereby reflecting all the available information in market in current security prices.

If markets are efficient, then stock prices would always reflect any market information in their price movements at any point of time. The correlation coefficient for two non-overlapping periods shall be zero. Else, one may leverage returns from one period to forecast returns in other time periods thereby making subnormal profits.

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Students have asked these similar questions
If markets are efficient, what should be the correlation coefficient between stock returns for two nonoverlapping time periods?
The metric that is used to show the extent to which a given stock’s return move up and down with the stock market?   a. Correlation b. Beta c. Standard deviation d. Expected return
Which of the following statements is INCORRECT about the Random Walk Hypothesis? A) It assumes successive returns are statistically independent. B) It assumes there is no correlation between the returns in one period and the next. C) It assumes the distribution of returns in all periods is identical. D) It assumes historical share prices can be used to predict future price movements.
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