Utilizing Momentum Trading Strategy on the UK Stock Market: Challenging Efficient Market Hypothesis
A number of studies have illustrated that stock returns may be predictable through implementing a momentum trading strategy, which contradicts the whole concept of the Efficient Market Hypothesis. This paper will discuss the Efficient Market Hypothesis and focus on its challenges in the face of behavioral finance. In addition, empirical research is conducted to test whether a momentum strategy can be implemented to successfully beat the market.
This dissertation draws on the framework developed by Jegadeesh & Titman (1993), while also taking ideas from other relevant scholars in the field, and analyses the monthly returns generated from the momentum strategy used, examining whether the returns in each constructed portfolio is greater than the return of the UK stock market (FTSE All-Share market index) for the period 2016, based around Brexit, an event which had an influence on the stock market as a whole, and construct another set of portfolios one-year prior to the event, to act as a control for comparability and to test validity of the momentum strategy being used to generate excess returns.
From the empirical data, it is seen that in the Brexit portfolios, every portfolio beat the market, however for the pre-Brexit portfolio, a few portfolios under performed the market, with the majority beating the market. Although the two time periods tested had dissimilar results, this dissertation can still confirm that the use of the momentum strategy can be used to predict future returns, and manage to earn abnormal returns.
This dissertation is inspired by the desire to gain a greater understanding of the financial markets, through implementing momentum trading strategies and examining anomalies to exploit any market inefficiencies. The research is motivated by a strong personal interest in the general topic areas and perceived gaps in existing literature. Moreover, financial market efficiency is the central importance to practitioners, investors, corporations and regulators, with financial theory being based around the belief that financial agents and markets are rational.
Furthermore, investors depend greatly on strategies which observe stock market behaviour, a key focus of this research. Also, with the continuous success of individuals such as George Soros and Warren Buffett, they represent the most immutable contradiction of market efficiency theories, that returns are unpredictable.
Momentum Trading Strategy Dissertation
Background to the study
Importance of the study
Structure of the dissertation
2: Literature Review
An introduction to the Efficient Market Hypothesis (EMH)
Testing the efficient market hypothesis
Testing the weak-form efficiency
The Filter approach
The Dow Theory
Testing the semi-strong form efficiency
Testing the strong-form efficiency
The calendar effect
The January effect
Under-reactions, over-reactions and contrarian strategy
Time period to test
The United Kingdom’s withdrawal from the European Union (Brexit)
One year prior to United Kingdom’s withdrawal from the European Union (pre-Brexit)
Formation Period and Holding Period returns
The Zero-Cost Trading Strategy
Null Hypothesis (H0)
Alternative Hypothesis (H1)
4: Results and Analysis
Results for 3-months formation period
Results for 6-months formation period
Results for 9-months formation period
Results for 12-months formation period
Testing the validity of the research results
The January Effect
Effect of the EU Referendum on the test results
Summary of research results
Limitations of the study and suggestions for further research
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View This Dissertation Here: Finance Dissertation Efficient Market Hypothesis Financial Markets
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