Event study analysis
“The relationship between elections and stock market returns”
Abstract
This master thesis research investigates the timing of election-induced events on the European financial stock markets. Positive stock market returns in periods with an election-induced event are found. Stock market returns are positively (less negatively) affected in periods ending with an election- induced event compared to the entire event-window. Furthermore, election-induced stock market returns on the European financial markets are positively correlated with the national stock market. Positive (negative) stock market returns following the election outcome on the national index will positively (negatively) affect the European stock returns. Moreover, we find that stock market returns are positively correlated with shifts in sentiment. Favourable (unfavourable) political news is positively (negatively) affecting stock market returns. Lastly, a negative relationship is found between economic performance and stock market returns during election periods. The abnormal stock market returns are positively (negatively) affected by elections before (after) the financial crisis. These results are in line with Pantzalis et al. (2000), Brown et al. (1998), Hibbs (1977), Lee et al. (2002) and Chan et al. (1996).
Keywords: Political elections, Stock market return, Financial Crisis, Europe.
Student name: Ronald Antonius Pieter van Eupen Administration number: 866381 E-mail address: Study program: MSc Finance CFA Track Supervisor: dr. D.A. (David) Hollanders Second reader: dr. F. (Fabio) Castiglionesi Date: August 29, 2017 2
Preface
This MSc thesis is the result of a graduation research under supervision of the Finance Department at Tilburg University. As part of the MSc Finance CFA track program, this research focussed around macroeconomic events and specifically the effect of political elections on stock market returns. This research has been practised in collaboration with the Tilburg School of Economics and Management (TiSEM). The basic objective of this research is to get more knowledge about investor behaviour and stock market returns during periods of elections.
In this MSc Finance, various effects and implications have been discussed with the help of an event based study regarding political elections and stock market returns. This research has contributed to help investors around the world in optimizing their asset allocation in times of uncertainty, as of elections.
Nothing of this would have been possible with the help of Tilburg School of Economics and Management. I would like to thank a few important people in particular. First, I would like to thank my supervisor dr. D.A. Hollanders with all the help and advice during my graduation. I have been more than grateful for the pleasant cooperation. Next, I would like to thank all the professors and faculty members of the Finance Department. Lastly and most important, I would like to thank my family and friends for all the support. They have kept me motivated and focussed during my graduation.
Ronald van Eupen Tilburg, August - 2017 3
Table of content
1. Introduction ...... 4 2. Literature review ...... 6 2.1 Stock market returns ...... 6 2.2 Stock market returns and political elections ...... 7 2.3 Spill-over effects of stock market returns ...... 9 3. Methodology ...... 11 3.1 Sample selection ...... 11 3.2 Event study methodology ...... 13 4. Data Analysis ...... 16 4.1 Constructing the index ...... 16 4.2 Identifying the missing data ...... 17 4.3 Political elections and stock market returns ...... 19 4.3.1. The Netherlands ...... 19 4.3.2. France ...... 27 4.3.3. Germany ...... 36 4.3.4. United Kingdom ...... 42 4.3.5. Spain ...... 50 4.3.6. Italy ...... 60 5. Robustness check...... 69 6. Conclusion ...... 71 6.1 Discussion ...... 72 7. Appendix ...... 73 7.1 Dutch parliamentary elections ...... 73 7.2 French presidential elections ...... 82 7.3 German federal elections ...... 91 7.4 United Kingdom general elections ...... 97 7.5 Spanish general elections ...... 106 7.5 Italian general elections ...... 115 8. References ...... 124 4
1. Introduction
March 16, 2017, German minister in the Chancellor’s Office Peter Altmaier tweeted the following: “Nederland oh Nederland jij bent een kampioen! Wij houden van Oranje om zijn daden en zijn doen! Gefeliciteerd met dit geweldig resultaat!”
This is one of many reactions after the election result of the Dutch general election on March 15, 2017. An important win by the conservative parties, where Euroscepticism is becoming increasingly popular across Europe. The Brexit of the United Kingdom and the presidential election of the United States of America was seen by many people as a sign of change. The rise of the “far-right” is not a false alarm, but the results show that a breakthrough of far-right is not unavoidable. This breakthrough is important as the Netherlands is the first important election in Europe in 2017, before the French presidential and the German federal election. Investors were pleased by the win of the Liberal Party VVD in the Netherlands as the AEX showed an 0.87% increase overnight whilst the election results were announced. However, the election results of the France and German elections are of greater importance for the stability in the EU, given their economic magnitude. In France, the first round of the presidential election is held on April 23th. Turbulent times are predicted by investors and analyst in case Mélenchon (far left) and Le pen (far right) won as they want to sever the connection of France with the European Union. A win by Emmanuel Macron gaining 24% of the votes is therefore a noteworthy revelation and characterized by a 4.13% increase overnight at the French stock index. Moreover, foreign markets showed positive stock market returns besides the effect of firms being cross listed. Elections have therefor an important impact on both the national stock market index as the foreign markets. Besides the economic impact, elections characterize democracy as first democracy depended on representatives for decision making, Woodruff (2005). Democracy originated more than 2400 years ago in Greece1. The definition of democracy is “rule by the people”, which means that the people govern their nation. Elections are mechanisms through which citizens participate directly in the political process and elect their fellow citizens into office for restricted periods of time, Alexander and Kaboyakgosi (2012). Elections are therefore major events that can change the direction of a country and should not be underestimated. It indirectly influences the financial landscape, affecting the optimal asset allocation of financial investors.
1http://www.civiced.org/pdfs/books/ElementsOfDemocracy/Elements_Subsection3.pdf 5
Because of this relationship, elections have an important weight on the financial sector. Moreover, unlike many other events that affect stock market returns, election events are known in advance. International financial investors have been struggling in showing returns over the years. The Financial Crisis of 2008 still has a major impact on international trade and investment streams around the globe. Setting a new direction through national and presidential elections can therefore be of great importance, especially after years of economic downturn. This study examines stock market behavior around political elections in different countries of the European Union and addresses the following questions. What is the spill-over effect of national elections on foreign stock markets? What is the influence of elections on stock markets returns after a period of growth? What is the influence of elections on stock market returns during a crisis? What is the influence of elections on stock market returns after a period of contraction? What is the duration of abnormal stock returns (before and after election)? This research explores these questions using a standard event study methodology based on King (2012). Abnormal return behavior around election dates across 6 European countries for the period around the financial crisis of 2008 are examined. To the best of the authors’ knowledge, it is the first study that rigorously quantifies the change in returns over time. Based on the question formulated above, this research will test whether elections have an influence on financial market returns and whether this influence changes over time around financial crisis.
Hence, the research question of this Master Finance thesis is:
“What is the effect of elections on stock market returns in a financial crisis?”
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2. Literature review
The literature review section is separated in three sections. In the first section, research papers that discuss stock market returns are presented. Research papers about stock market returns and political elections are discussed in the second part. Lastly, papers that address spill-over effects on international stock markets are addressed.
2.1 Stock market returns
Even though no other research has performed a test to check whether the effect of elections on stock market returns changes over time in crisis periods, the empirical literature does provide numerous papers that address stock market returns. Particularly, the relation between volatility and stock market returns is an important topic within the academic literature. One of the most cited research papers in this area is performed by French et al. (1987), which investigated whether expected market risk premium (defined as expected return minus the risk-free rate) is positively related to volatility. They find a positive relation between the expected market risk premium and the predictable level of volatility. Also, a strong negative relation between the unpredictable component of stock market volatility and excess returns is found. However, if risk premiums are positively related to predictable volatility, a positive unexpected change in volatility increases future expected risk premiums. This indirectly means that elections should have a positive impact on stock market returns. An unexpected change in the election process which diminishes uncertainty has a positive effect on the predictable level of volatility. This in turn means an increase in future expected risk premiums, hence positive stock market returns. Merton (1980) elaborates this further and implies that the expected risk premium on the market is proportional to the variance of the market returns if investors demonstrates constant relative risk aversion. A percentage increase in post-event expected returns is equal to the percentage increase in the post-event return variance. In general, the increase in post-event return is bigger than the increase in the variance rate. Brown et al. (1988) have tested the uncertain information hypothesis (UIH) in explaining the response of investors to the arrival of unanticipated information. They find that when a large sample of favourable and unfavourable events are analysed separately, the immediate price change will be followed by positive returns during the post-event period.
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Favourable or unfavourable news immediately affect stock market prices. As the uncertainty surrounding the event is reduced, this will consequently positively affect stock market returns, regardless of the event in dispute. However, unless we are in a perfect world, it is impossible to predict accurately the direction and magnitude of stock market returns for individual events on an ex ante basis because humans do not always act rational. The same was found by Werner et al. (1984). As uncertainty about the electoral outcome increases, it becomes harder to forecast the stock’s expected value. Hence, stock’s market prices are adjusted upward and downward over time in an attempt to equilibrate the stock’s expected value and posted price. An important study which this research is related to is Chan et al. (1996). It investigates the influence of political risk on stock price volatility in Hong Kong. They found elevated levels in volatility in cases where there is political news compared to situations where there is no political news. Hence, political news amplifies stock market volatility. This in turn is useful in this research as fluctuations in volatility can cause fluctuations as big in stock market returns as demonstrated by Merton (1980). Furthermore, favourable political news has a positive effect on stock market returns (Blue-index), while unfavourable news has a negative impact at the stock market (Blue-index). This seems logical, however as Chan et al. (1996) further elaborate this is not. Political news, favourable or unfavourable, only affects volatility of the Chinese orientated stocks but not the stock market returns of the Chinese orientated stocks due to marketwise and substitution effects. This contradicts this research paper, since it is expected that both national as well as a transnational stock market returns are affected by elections.
2.2 Stock market returns and political elections
The research question of this paper is about the impact of elections on financial stock market returns. Many papers in the academic literature have addressed the relationship between stock market returns and volatility as described above, however less papers have addressed the relationship between stock market performance and elections. Following Pantzalis et al. (2000), political elections are specifically important since elections provide inhabitants of a country the possibility to exert influence on the medium- and long-term course of that country. They hold the power to re-elect the incumbent or punish the incumbents by electing a new government setting a new course.
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Therefore, elections have an indirect impact on the economy by which they are closely monitored by investors and other financial market participants. Consequently, financial markets react strongly on new information regarding decisions that impact monetary and fiscal policies. Based on the uncertain information hypothesis (UIH) formulated by Brown et al. (1988), stock market returns tend to positively react as uncertainty regarding the election outcome is reduced. However, if the election outcome is less certain or investors are not able to assess their asset allocations on the country’s new course, a surprise effect is expected. Positive price changes are then expected in the weeks following the election outcome. Indeed, as Pantzalis et al. (2000) have discovered, positive stock market reactions are measured in the two-week preceding the political election and this persists through the four-week period following the election. More specifically, the results suggest that a positive election effect is primarily concentrated in cases where the country’s economic performance is poor. This is particularly interesting as part of this research is focused around the question whether political elections are negatively correlated with economic performance. It is expected that the voting turn-out and the impact are higher after a period of economic downturn and vice versa. Lee et al. (2002) found that a shift in sentiment has a significant positive impact on stock market excess returns. Brown and Cliff (1999) have regressed sentiment with time and found weak evidence of short-run predictability but a strong correlation between sentiment and long-horizon (2–3 years) returns. As Bernard Baruch stated, what is important in market fluctuations are not the events themselves, but the humans’ reactions to those events. This is an important statement in behavioral finance, because empirical literature assumes that humans act rational. This statement is further grounded by an important law in experimental psychology formulated by Bayes. He states that humans correctly react to the arrival of new information. Nevertheless, research performed by Werner et al. (1984) have suggested that in violation of Bayes’ rule, most people tend to “overreact” to unexpected and dramatic news events. Humans, investors, overweight recent information and underweight prior data. The term overreaction carries with it an implicit comparison to some degree of reaction that is considered to be appropriate. Therefore, timing is an important variable in explaining stock market returns. Bullish shifts in sentiment are negatively related to the volatility of returns but are positively related with stock market excess returns, vice versa for a bearish shift in sentiment. Furthermore, the magnitude of the change in sentiment has a significant impact on stock market returns as well.
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As the change in sentiment increases, the fluctuation in upward and downward revision of stock market returns becomes more severe. This is also the case in Bialkowski et al. (2008). A change in the political orientation of a country can cause a period of excessive volatility that continues for a longer period. Durnev (2011) has relate corporate investments to political uncertainty and found that investment-to-price sensitivity is 40% lower during election years than to non-election years. This effect is even stronger when it is harder in forecasting the election outcome. According to the “information view” of investments, elections are associated with uncertainty about future government policies. This may lower the information quality of stock prices. These results have implications for policymakers. In markets with high political uncertainty, the stock market is less able to guide capital to its best uses and lowers stock market performance. This suggests that it is important for policymakers to find mechanisms to reduce unnecessary political uncertainty. However, the anticipation left-wing or right-wing policymakers has significant influence on the volume of shares trading in the market as Werner et al. (1984) shows. The empirical results show a decrease in both trading volume as well as the mean and volatility of stock prices in the United States and Great Britain under left-wing administrations, vice versa for right-wing administrations. The result indicates a positive influence of right-wing party policies on stock market returns.
2.3 Spill-over effects of stock market returns
The previous parts of the literature review have focussed about the relationship between stock market returns and volatility and the effect of elections on stock market returns. However, as financial markets are more linked due to globalization, it is interesting to see the effect of stock market returns motivated by political elections on foreign markets. As already pointed out in the research paper of Chan et al. (1996), political news has a positive effect on British orientated stock returns, while unfavourable news has a negative impact on British orientated stock returns. This seems logical, however as Chan et al. (1996) further elaborate, this is not always the case. Political news, favourable or unfavourable, has a market wide effect. Substitution effects occur in which only the volatility of Chinese orientated stocks is affected but not the returns. This is particularly interesting as this research paper has the European Market as target market where national borders are less profound as in Hong Kong.
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It is expected that the impact of a single nation within the European market has a much greater reach that impacts the European financial markets as a whole. This transnational impact is also find by Bialkowski et al. (2008), which has investigated the impact of elections across 27 industrialized OECD countries. Not only they find elevated stock market volatility around national elections, there appears to be a market inflation in unconditional variance. Second, uncertainty about election outcome has implications for risk averse investors. French et al. (1991) and Baxter et al. (1997) found a significant home bias. Investors are undiversified internationally. However, the financial crisis of 2008 have shown that financial markets are more interlinked than ever. Any wide spread fluctuations will increase systematic risk of all stocks listed. Hamao et al. (1990) have elaborate this further and find that unexpected changes in foreign stock market returns are associated with significant spillover effects on the conditional mean of the domestic market for both open-to-close and close-to-open returns. In their research focusing on the stock market of the United States, United Kingdom and Japan a significant spillover effect from the US and UK on the Japanese market is found. Hilliard (1979), Jaffe and Esterfiel (1985a, 1985b), Eun and Shim (1989), Barclay, Litzenbergen and Warner (1990) all find evidence of positive correlations in daily close-to-close returns across the financial stock markets. Therefore, it is expected that political elections have a significant spill-over effect on foreign financial markets.
Based on the literature discussed above, the following hypotheses are tested:
H1: Stock market returns are likely to be higher over election-induced periods than over periods without an election.
H2: Elections have a positive spill-over effect on foreign stock markets.
H3: The level of impact of elections on stock market returns is negatively correlated with economic performance.
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3. Methodology
As mentioned in the introduction, the aim of this research paper is to study the impact of political elections on stock market returns. In particular, this research investigates the significance of time. The methodology part of this research paper consists of the selection criteria, the methodology and in the end the data is discussed.
3.1 Sample selection
As Pantzalis, Stangeland and Turtle (2000) have argued in their paper, political events exert significant influence on the financial markets. Particularly, investors are curious about political decisions that may impact monetary and fiscal policies. Therefore, investors are closely following political events and their outcomes. Asset allocations are revised as investors’ expectations are impacted by these political decisions. Political elections are amongst the most important political events. Especially, since voters have the opportunity to exert their voting power in choosing the course of a nation for the medium- and long term. Furthermore, the information coverage by the media, pollsters and analysts is tremendous. The process of filtering this information between politicians and the public has an indirect effect on the financial markets as it adjusts the thoughts of voters. Lastly, as the outcome of elections becomes more certain, financial market participants revise their asset allocations. For this reason, only political elections on a national level are used in this research as they exert the most power on the medium- and long-term course of a country and hence perform the most influence on the financial markets. Consequently, only general, presidential and federal elections are included. Next, a country sample is needed. Only countries of the European Union are used for this research. The European Union is a perfect market for my purposes, as the impact of elections is not limited to a national level, but also has a transnational impact as European member states are part of the European Union market. A good manner to measure spill-over effects. An important selection criteria for the sample selection is the scale of the economy. Therefore, only the most important economies of the European Union are chosen aligned by political elections. These consist of the countries listed in table 1.
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The data that will be used can be seen in table 1 and will mainly be retrieved from DataStream, Yahoo Finance and Bloomberg. Market returns of national stock exchanges of the 6 biggest European economies by GDP are used2. In order to investigate whether the influence of elections on stock market returns changes by time, a categorization is made to distribute elections in a before, during or after financial crisis period. The election sample and the distribution of the political elections by time used for this research can also be found in table 1. Lastly, a created European market index is used as a benchmark model in order to measure the impact of national elections on the European level.
Table 1: event study sample
Country Type of Election Index Before During After The Netherlands General AEX 2006 2010 2017 France Presidential CAC 40 2007 2012 2017 Germany Federal DAX 2005 2009 2017 United Kingdom General FTSE 100 2005 2010 2015 Spain General IBEX 35 2008 2011 2015 Italy General FTSE MIB 2006 2008 2013
A few notes are in order. While the inhabitants of the United Kingdom have voted for leaving the European Union, this research will include the United Kingdom within the European Market for simplicity reasons. The general elections occurred during the time that the United Kingdom was a member state of the European Union. Also, the French presidential elections occur in two rounds. The uncertainty information hypothesis by Brown et al. (1988) states that uncertainty around elections is resolved prior to the actual election date which positively effects stock market returns. Most of the uncertainty surrounding the presidential elections is resolved after the first round as the number of electors is reduced. Much of the election result in round two is priced in. So, in order to calculate the clear impact of elections on stock market returns, only the first round of the French presidential elections is used.
2http://statisticstimes.com/economy/european-countries-by-gdp.php
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3.2 Event study methodology
According to the efficient market hypothesis, stock prices reflect all available information. Using this hypothesis, an event study can be used to calculate how an event changes stock prospects by quantifying its impact on the stock price. An event study methodology is particularly suitable since the election dates differs in the sample as shown in table 1. By using an event study methodology, we use t=0 as instead of a calendar date. In this way, I can compare multiple election events starting at different moments in time. In following Pantzalis et al. (2000) and Bialkowski et al. (2008) an estimation period of 100 weeks will be used. Furthermore, the two-week pre-event window [-4, -3] is not included in the estimation window to prevent contamination by the event. The event study methodology is based on King (2012). The analysis differentiates between returns that would have been expected if the event did not take place (normal returns) and returns that were caused by the event (abnormal returns). The most used technique in an event-based research is the market model. I will use MacKinlay’s (1977) market model in my research which relates any excess return to the excess return of the market portfolio in order to calculate abnormal returns. First the daily stock market returns are modelled as follows:
R , = � + � ∗ � + � ,
Where R , and � are the daily returns of the stock prices and the market portfolio and � , is the error-term. Further, under general conditions ordinary least squares (OLS) is a consistent estimation procedure for the market model parameters α and β. With the daily returns of stock prices the abnormal return can be calculated as the difference between the actual ex post return over the event window minus the normal return over the same event window:
AR , = R , − E(� , | � )
ARi,t, Ri,t, and E(Ri,t | Xi,t) are the abnormal, actual, and normal returns respectively for time period t. There are two ways of modeling the normal return. Since we use the market model, the normal return is defined as the expected return without conditioning on the event taking place, hence the market return. The market model assumes a stable linear relation between the market return and the security return, MacKinlay’s (1977).
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This kind of analysis is performed for multiple events of the same type (here elections) and may show typical patterns of stock market returns. Abnormal returns associated with a point in time before or after the event are defined by the Average Abnormal Return (AAR). It allows to check the magnitude of the outperformance of the stock sample relatively towards the reference sample. AAR is defined as follows: 1 AAR = �� N ,
In the end, the total impact of the event over the time period, also known as the “event window”, has to be measured. The event window is defined by [T , T ] and can be measured by adding up individual abnormal returns. This gives Cumulative Abnormal Return (CAR), as shown in the formula below: