In the first essay, I examine the impact of the introduction of exchange traded funds (ETFs) options on the information related trading of index options. Two option pairs, NASDAQ 100 index (NDX) and ETF (QQQ, currently QQQQ ) options, and Standard and Poor's 500 index (SPX) options and S & P Depository Receipts (SPY) options, are studied. I test the hypothesis, based on the theory of Chowdhry and Nanda (1991), and Admati and Pleiderer (1988), that the information component of spreads for index options should decline after ETF options were introduced. The method of George, Kaul and Nimalendran (1991) is used to estimate the adverse selection proportion of log quoted spread and revenue from quoted spread. Primary results show that the adverse selection component of index options declines after the introduction of ETF options, and that the adverse selection component of options on index ETFs is greater than that of options on index, suggesting more informed trading for ETF options. The second essay examines whether the liquidity premium decreases as the costs of transactions decline. Nine liquidity measures are estimated to form liquidity deciles portfolios. I use several benchmark asset pricing models in fixed and rolling 36-month samples to estimate time variation liquidity premia. Surprisingly, the results show that the liquidity premium does not monotonically decline over time, and it increases in the period from 2001 to 2006. This is inconsistent with the implication of liquidity-adjusted capital asset pricing models (L-CAPM). It is likely that the liquidity premium is generated by size and book-to-market factors, rather than the liquidity factor.

Este trabalho procura descrever e analisar a importância dos formadores de mercado e os objetivos das empresas que contratam os marketmakers na Bolsa de Valores de São Paulo (BOVESPA). Ele apresentará algumas características da legislação brasileira e informações a respeito deste mercado no Brasil para, através de ferramental estatístico, analisar se um formador de mercado pode trazer aumento de valor para os ativos bem como diminuição de volatilidade. Através de busca no sítio da BOVESPA de janeiro de 2002 a janeiro de 2010, foram analisadas 98 empresas de capital aberto na BOVESPA e após exclusões por falta de dados para montar a janela de eventos ou insignificância dos coeficientes, a análise se concentrou em 57 ativos. Foram elaboradas duas janelas de eventos (2 dias e 11 dias) e os resultados apontaram que há uma diminuição da amplitude diária, sugerindo a diminuição de volatilidade, e dessa forma, redução de riscos ao investidor, mas por outro lado, não há estatisticamente uma evidência de que há retornos anormais significativamente diferentes de zero quando da entrada de um formador de mercado tampouco quando da saída do marketmaker, exceto no retorno acumulado quando da saída do formador mercado da janela de eventos de 11 dias, com resultado positivo em 4.79%. Entretanto, mesmo com pouca significância estatística, todos os resultados podem estar indicando um eventual aumento (diminuição) da assimetria informacional quando da entrada (saída) do formador mercado. / This dissertation wants to analyze the importance of the marketmakers and describe the companies‟ goals when they decide to hire marketmakers in Brazilian stock Market Exchange (BOVESPA). After presenting the Brazilian legal environment and available data, the analysis focus on an event-study looking for changes in volatility using the daily amplitude as a proxy and the positive(negative) abnormal returns when hiring(rescinding) marketmakers. From January 2002 to January 2010, 98 enterprises were analyzed and after exclusions due to lack of data for event-study window estimation or coefficient non-significance , the analysis was concentrated on 57 assets. Two event-windows were created for this work (2 and 11 days) and results suggest volatility reduction when marketmaker services are being provided. However, there are no statistical evidence of abnormal returns due to the marketmaker, except for the 11-day-event-study when marketmakers stop providing the service, with a positive result of 4.79%. However, results tend to show with little significance an increase (decrease) of information asymmetry when marketmakers starts(stops) providing their services.

Este trabalho procura descrever e analisar a importância dos formadores de mercado e os objetivos das empresas que contratam os marketmakers na Bolsa de Valores de São Paulo (BOVESPA). Ele apresentará algumas características da legislação brasileira e informações a respeito deste mercado no Brasil para, através de ferramental estatístico, analisar se um formador de mercado pode trazer aumento de valor para os ativos bem como diminuição de volatilidade. Através de busca no sítio da BOVESPA de janeiro de 2002 a janeiro de 2010, foram analisadas 98 empresas de capital aberto na BOVESPA e após exclusões por falta de dados para montar a janela de eventos ou insignificância dos coeficientes, a análise se concentrou em 57 ativos. Foram elaboradas duas janelas de eventos (2 dias e 11 dias) e os resultados apontaram que há uma diminuição da amplitude diária, sugerindo a diminuição de volatilidade, e dessa forma, redução de riscos ao investidor, mas por outro lado, não há estatisticamente uma evidência de que há retornos anormais significativamente diferentes de zero quando da entrada de um formador de mercado tampouco quando da saída do marketmaker, exceto no retorno acumulado quando da saída do formador mercado da janela de eventos de 11 dias, com resultado positivo em 4.79%. Entretanto, mesmo com pouca significância estatística, todos os resultados podem estar indicando um eventual aumento (diminuição) da assimetria informacional quando da entrada (saída) do formador mercado. / This dissertation wants to analyze the importance of the marketmakers and describe the companies‟ goals when they decide to hire marketmakers in Brazilian stock Market Exchange (BOVESPA). After presenting the Brazilian legal environment and available data, the analysis focus on an event-study looking for changes in volatility using the daily amplitude as a proxy and the positive(negative) abnormal returns when hiring(rescinding) marketmakers. From January 2002 to January 2010, 98 enterprises were analyzed and after exclusions due to lack of data for event-study window estimation or coefficient non-significance , the analysis was concentrated on 57 assets. Two event-windows were created for this work (2 and 11 days) and results suggest volatility reduction when marketmaker services are being provided. However, there are no statistical evidence of abnormal returns due to the marketmaker, except for the 11-day-event-study when marketmakers stop providing the service, with a positive result of 4.79%. However, results tend to show with little significance an increase (decrease) of information asymmetry when marketmakers starts(stops) providing their services.

Este trabalho procura descrever e analisar a importância dos formadores de mercado e os objetivos das empresas que contratam os marketmakers na Bolsa de Valores de São Paulo (BOVESPA). Ele apresentará algumas características da legislação brasileira e informações a respeito deste mercado no Brasil para, através de ferramental estatístico, analisar se um formador de mercado pode trazer aumento de valor para os ativos bem como diminuição de volatilidade. Através de busca no sítio da BOVESPA de janeiro de 2002 a janeiro de 2010, foram analisadas 98 empresas de capital aberto na BOVESPA e após exclusões por falta de dados para montar a janela de eventos ou insignificância dos coeficientes, a análise se concentrou em 57 ativos. Foram elaboradas duas janelas de eventos (2 dias e 11 dias) e os resultados apontaram que há uma diminuição da amplitude diária, sugerindo a diminuição de volatilidade, e dessa forma, redução de riscos ao investidor, mas por outro lado, não há estatisticamente uma evidência de que há retornos anormais significativamente diferentes de zero quando da entrada de um formador de mercado tampouco quando da saída do marketmaker, exceto no retorno acumulado quando da saída do formador mercado da janela de eventos de 11 dias, com resultado positivo em 4.79%. Entretanto, mesmo com pouca significância estatística, todos os resultados podem estar indicando um eventual aumento (diminuição) da assimetria informacional quando da entrada (saída) do formador mercado. / This dissertation wants to analyze the importance of the marketmakers and describe the companies‟ goals when they decide to hire marketmakers in Brazilian stock Market Exchange (BOVESPA). After presenting the Brazilian legal environment and available data, the analysis focus on an event-study looking for changes in volatility using the daily amplitude as a proxy and the positive(negative) abnormal returns when hiring(rescinding) marketmakers. From January 2002 to January 2010, 98 enterprises were analyzed and after exclusions due to lack of data for event-study window estimation or coefficient non-significance , the analysis was concentrated on 57 assets. Two event-windows were created for this work (2 and 11 days) and results suggest volatility reduction when marketmaker services are being provided. However, there are no statistical evidence of abnormal returns due to the marketmaker, except for the 11-day-event-study when marketmakers stop providing the service, with a positive result of 4.79%. However, results tend to show with little significance an increase (decrease) of information asymmetry when marketmakers starts(stops) providing their services.

Bakgrund: Det har tidigare konstaterats att det existerar ett samband mellan aktiers likviditet och dess avkastning. Bevis för detta har främst gått att finna på utländska aktiemarknader. På den svenska aktiemarknaden har tidigare utförda studier konstaterat att detta samband inte existerar. Vi vill därför göra en studie på den svenska aktiemarknaden, vilken delvis innefattar en ny tidsperiod för att se om någon likviditetspremie existerar. Syfte: Vårt syfte med denna studie var att undersöka om det är möjligt att uppnå en högre avkastning genom att investera i en portfölj med relativt sett illikvida aktier jämfört med en portfölj bestående av likvida aktier på Stockholmsbörsen samt undersöka om faktorerna likviditet, betavärde samt företagsstorlek signifikant påverkar portföljernas eventuella överavkastning jämfört mot ett lämpligt index. Metod: Vi har skapat tre olika portföljer, med tio aktier i varje vilka representerar de minst, mitterst och mest likvida aktierna enligt vårt valda likviditetsmått, aktieomsättningshastighet. Likviditetsmåttet laggar en månad för att kunna användas som investeringsstrategi. Vi har studerat portföljernas värdeutveckling under perioden september 2003 till december 2011 för att se om portföljernas olika likviditet påverkar avkastningen. Genom regressionsanalyser där aktieomsättningshastighet, betavärde samt storleken använts som oberoende variabler har vi försökt förklara portföljernas överavkastning mot AFGX. Resultat: Vi har kommit fram till att det inte existerar någon likviditetspremie på Stockholmsbörsen under vår valda undersökningsperiod. Det samma gäller under uppåt- respektive nedåtgående marknadstrend. Det enda fallet där en mer illikvid portfölj presterar bäst är under januari månad. / Background: Earlier studies have concluded that there is a connection between a stock’s liquidity and its yield. Proof of this connection has mainly been found on foreign stock exchanges. On the Swedish stock market, earlier studies have concluded that this connection may not exist. The authors therefore intend to do a liquidity study on the Swedish stock market on a partly new time period to see whether this liquidity premium exists or not. Aim: The aim with this study is to investigate if there is a possibility to achieve a higher yield by investing in a portfolio consisting of relatively illiquid stocks contrary a portfolio with highly liquid stocks. We also want to investigate if the factors: liquidity, beta value and company size have a significant impact on the portfolios possible excess return in relation to an appropriate index. Completion: In this study, the authors have constructed three different portfolios consisting of ten stocks, each which represent the least, middle, and highest liquid stocks according to our liquidity measure. This measure has a one-month lag to make it possible to use as an active investment strategy. The authors have studied the portfolios growth during the period September 2003 to December 2011 to investigate if the difference in liquidity has any impact on the return. Through regression analysis, where stock turnover ratio, beta value and company size has been used as independent variables, the study tries to explain the portfolios excess return over the AFGX index. Results: The study concludes that there is no significant liquidity premium during our chosen time period. The same conclusion is drawn on the sub-periods with both an up going and down going market trend. The only period during which an illiquid portfolio outperforms a liquid portfolio is during the month of January.

Investors have historically demanded a return premium for taking on the risk of illiquidity both in terms of characteristic and systematic liquidity risk. Recent research have presented results suggesting that the liquidity premium is diminishing. The increasing popularity of passive investments such as Exchange Traded Funds (ETFs) have been proposed as a driving force for the declining trend. Despite the popularity of ETFs, there is limited research how they impact the financial markets. The purpose of this thesis is to investigate how the liquidity premium has developed in the United States between 1997 and 2016 and to explore if developments in the liquidity premium can be linked to the capital inflow to the United States ETF market. The thesis uses measures of stocks’ spreads and order book depths as proxies for the characteristic and systematic liquidities. The proxies are used to test if liquidity has influenced stock returns over 1-year, 5-years and the entire 20-year period. The empirical results obtained through Fama-MacBeth regressions show that the liquidity premium can fluctuate by both sign and magnitude year by year. The characteristic risk premium is negative and significant for the entire 20-year period and the 1-year regressions suggests a clear negative trend. The systematic liquidity premium on the other hand is positive and significant for the entire 20-year period but the 1-year regressions do not show a clear trend. The empirical results show no statistical significance that ETFs influence the liquidity premium. However, the graphical interpretation of the 1-year regressions suggests that the characteristic liquidity premium is negatively correlated with the growth of ETFs. The negative characteristic premium implies that investors are not being adequately compensated for the risk of illiquidity and should therefore avoid a liquidity-based investing strategy which has generated excess return in the past.

Submitted by Eduardo Gomes (esgomes@gmail.com) on 2013-01-15T17:32:40Z No. of bitstreams: 1 FGV MFEE Eduardo Gomes.pdf: 846321 bytes, checksum: 06db422e930bdce11432937d05e9e9c3 (MD5) / Approved for entry into archive by Vitor Souza (vitor.souza@fgv.br) on 2013-01-15T19:37:25Z (GMT) No. of bitstreams: 1 FGV MFEE Eduardo Gomes.pdf: 846321 bytes, checksum: 06db422e930bdce11432937d05e9e9c3 (MD5) / Made available in DSpace on 2013-02-04T17:28:56Z (GMT). No. of bitstreams: 1 FGV MFEE Eduardo Gomes.pdf: 846321 bytes, checksum: 06db422e930bdce11432937d05e9e9c3 (MD5) Previous issue date: 2012-05-31 / This study aims to investigate the existence of a liquidity premium in Brazilian stocks. By building portfolios sorted by various measures of liquidity is possible to test the differential expected return and risk incurred. The expected return of the portfolio built with less liquid stocks is significantly higher than the return of the portfolio built with the most liquids stocks. Conventional measures of risk (market and Fama-French factors) do not explain this excess of return. We tested different liquidity measures and the methodology proposed by Hwang and Lu (2007) was the one that the effect was more considerable. Taken together, the evidences show the presence of a liquidity premium in Brazil. / Esse trabalho tem como objetivo investigar a existência de um prêmio de liquidez nas ações brasileiras. Através da construção de portfólios classificados por diferentes medidas de liquidez é possível testar o diferencial esperado de retorno e o risco incorrido. O retorno esperado do portfólio construído com ações menos líquidas é significantemente superior ao retorno do portfólio construído com as mais líquidas e as medidas convencionais de risco (mercado e fatores Fama-French) não explicam este excesso de retorno. Foram testadas diferentes medidas de liquidez sendo a metodologia proposta por Hwang e Lu (2007) aquela onde o efeito é mais considerável. Em conjunto, as evidências mostram a existência de um prêmio de liquidez no Brasil.

Liquidity is a measure of the ease with which an asset can be converted into cash. In a perfectly liquid market, conversion is instantaneous and does not incur costs. Amihud and Mendelson (1986:224) proposed that illiquidity increases the expected return on an investment (liquidity premium) and simultaneously lengthens the holding period. These two effects are known respectively as the “spread-return relationship” and the “clientele effect” and have theoretical as well as practical implications. From a theoretical perspective it may help to explain the gap between the capital asset pricing model (which assumes that markets are perfectly liquid) and the associated empirical evidence; which thus far has been rather poor. From a practical perspective, liquidity will influence stakeholders’ decisions and market competitiveness (Amihud&Mendelson, 1991:61-64). The relevant stakeholders are governments, stock exchange regulators, corporations, investors and financial intermediaries. Emerging economies such as the South African economy typically have less liquid markets than the developed world. While this may be attractive for investors looking for higher returns, Amihud and Mendelson (1991:61) are of the opinion that liquid markets are more generally favoured by investors. Constantinides (1986:842-858), also proposes a model for liquidity, but found the liquidity premium to be of lesser importance than that proposed by Amihud and Mendelson (1986:223-231) but also supports the suggestion that investors will favour liquid markets. Although it is by no means a perfect proxy, a security’s bid-ask spread has been found to be an attractive and effective measure of liquidity. It has been found to correlate with beta as well as market capitalisation and several other variables commonly used in capital markets research. Because of this correlation the effect of the bid-ask spread cannot be studied in isolation when regression techniques are employed (Ramanathan, 1998:166). This is particularly problematic because empirical evidence for beta, which is arguably the most important independent variable in financial cross sectional relationships, is weak. Beta has to be estimated and so it is not clear if real markets do not support CAPM theory or if beta cannot be estimated with the required accuracy. All of the common independent variables used in empirical capital markets research are correlated to beta, and for this reason it cannot be established if these variables have a real effect or if they are simply serving as a proxy for the difference between the real and the estimated beta. Various strategies have been proposed to increase the accuracy of beta estimation and these are discussed in detail in this research. Successes with these strategies have been mixed. A second problem encountered in the empirical research base relating to the CAPM is that in the theory the cross-sectional relationship is between expected market return (which cannot be observed due to the vast number of real investments beyond those listed on exchanges) and beta, whereas empirical research makes use of actual return on a market proxy and beta. In order for the actual return to approach the expected return, empirical studies have to be conducted over extended periods. Accurate data for such periods are generally lacking and severe macro-economic changes such as wars, may also affect rational economic behaviour. It has to be kept in mind that the entire CAPM theory flows from the simple assumption that investors aim to achieve the highest return per unit of risk, and so a rejection of beta is a rejection of rational investor behaviour. Liquidity however, addresses one of the assumptions of CAPM, namely that markets are perfectly liquid; which obviously is not met in real markets and so CAPM models expanded for liquidity should be a reasonably fundamental starting point for all empirical capital markets research. The current empirical evidence for the spread-return relationship is inconclusive. While some researchers have found a significant relationship, others have questioned the ability of the methodology to differentiate a true relationship from the ‘proxy for errors in the estimated beta’ problem. Deductions (as explained in section 4.3) that have been made from the research of Marshall and Young (2003:176-186) in particular, provide strong evidence that at least some of the relationship is due to the ‘errors in estimated beta’ problem. Little empirical work has been done on the clientele effect. Atkins and Dyl (1997:318-321) found a significant relationship between holding period and bid-ask spread, although their approach was somewhat unorthodox in the sense that portfolio formation was not done and the effect of beta was not tested. This study tests empirically both the spread-return relationship and the clientele effect on the Johannesburg Stock Exchange over the period stretching from January 2002 to June 2007. The methodology of Fama and Macbeth (1973:614-617) as well as the aggregated beta of Dimson (1979:203-204) were mainly used, with some modifications as suggested by other researchers. With regard to the spread-return relationship, the findings of this study do not support theoretical expectations. This may be due to the short time period that was used as well as the difficulty in estimating beta. To the contrary, very significant evidence for the clientele effect was found, with little to no influence from market capitalisation and beta, which is as expected. Further investigation into the spread-return relationship is required. If a liquidity premium is not present, foreign investors will favour liquid developed markets above the JSE. This implies that efforts of exchange regulators and the government to decrease illiquidity will lead to foreign portfolio investment inflow into the South African economy. / Dissertation (MBA)--University of Pretoria, 2008. / Graduate School of Management / unrestricted

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Optimisation des modèles d'évaluation et de couverture d'options financières sous contraintes de liquidité / Optimization of pricing and hedging models for financial options under liquidity constraints