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Essentials Of Investments
Found in: Page 231
Essentials Of Investments

Essentials Of Investments

Book edition 9th
Author(s) Zvi Bodie, Alex Kane, Alan Marcus, Alan J. Marcus
Pages 748 pages
ISBN 9780078034695

Short Answer

A zero-investment well-diversified portfolio with a positive alpha could arise if:

a. The expected return of the portfolio equals zero.

b. The capital market line is tangent to the opportunity set.

c. The law of one price remains un-violated.

d. A risk-free arbitrage opportunity exists.

The Correct answer is ‘d’

See the step by step solution

Step by Step Solution


A set of financial portfolios composed of securities that result in cumulatively a net value of zero is known as zero-investment portfolio.

Evaluation of the theory of arbitrage

The risk-free arbitrage opportunity implies buying a stock at a lower price and selling it simultaneously at a higher price, thereby gaining by the difference without having any holding period. In such cases, the investor either invests nothing (i.e. zero investment) or receives an initial inflow but expects a positive payoff (i.e. positive alpha). Since such situations arise when there exists risk-free arbitrage opportunity, the correct answer would be an option ‘d’.

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