High Frequency Trading (HFTs) have dramatically changed the way markets operate through supplanting traditional market makers. Numerous studies and pundits have postulated a link between HFTs and market sell-off severity. Developed by Easley and O’Hara, the Volume Synchronized Probability of Informed Trading (VPIN) is a metric that uses volume imbalances to determine the probability of informed trading. This study finds that a time-based variation of VPIN can be useful in predicting market sell-offs as it has a positive relationship with forward semivariance and a negative relationship with forward returns under different market conditions.

acase@tulane.edu / The relationship between microstructure, efficiency and data frequency give us a new opportunity to test information (e.g. events and news) efficiency assimilation for Mexican ADRs and their underlying Bolsa Mexicana de Valores (BMV) stocks It also allows to corroborate whether in emerging markets, specifically in the Mexican market, insider trading could be present but it may not be necessarily detected by market efficiency tools only. Using a proprietary dataset of Mexican Stock Exchange (Mexican Bolsa) intraday prices for underlying stocks and their respective Type II and III ADRs quoted in NASDAQ, AMEX and New York Stock Exchange, time series analysis related to price dynamics and event studies methodologies were applied. Non-linearity of the prices was tested, finding no statistical evidence of such behavior, which led to conclude linearity in them. Volatility transmission was also analyzed, finding that external shock can impact both markets having a recursive behavior; shocks in Mexican market has an impact also in American Market and vice versa. Using a standard Event Studies methodology we tested for nine different corporate events (dividends, changes in capital structure, acquisitions, mergers, takeovers, spin offs, sell offs, joint ventures and privatizations) and seven different classes of stocks in both markets, looking for parallelism in cumulative abnormal returns, volatility, trade volume and Granger causality. The results are a statistically significant behavior similar in both markets (for both CARs and volatility). The evidence of Granger-causality in ADR / underlying stock was detected in both ways: underlying stocks Granger cause the ADRs and vice versa. The results corroborate a non-arbitrage behavior in both markets and no evidence of insider trading in ADRs / underlying stocks in both markets / 1 / Polux E. Diaz Ruiz

<p>In Rio De Janeiro, 1992, was the first document signed that meant a responsibility for industrial countries to decrease their emissions, United Nations Framework Convention on Climate Change (UNFCCC). Thirteen years later was the first legal binding document signed, the Kyoto protocol, and for the first time industrial countries all over the world was bound to decrease their emissions on greenhouse gases. Within the framework of this commitment, three flexible mechanisms (Clean Development mechanism, Joint Implementation and Emission trading) were introduced with the function to reduce the economical costs of the commitment. The flexible mechanisms Emission Trading (ET) is what this report is about.</p><p>The report starts with a description of carbon dioxide and it’s effect on the environment, thereafter comes a background review of the national agreements who lies as a ground to the implementation of emission trading as a management control measure in Sweden and the rest of the world.</p><p><em><p>Keywords</p>: United Framework Convention on Climate Change, Kyoto protocol, Flexible mechanisms, Emission trading, carbon dioxide </em></p>

The purpose of the thesis aims to investigate pair trading strategies which are frequently used by hedge funds adopting non-directional strategies. It is also our intention to develop a set of streamlined operational guidelines for pair trading strategy to be implemented in the Taiwan securities markets. Daily closing prices of listed stocks are used. The database is compiled by Taiwan Economic Journal, covering companies listed on the Taiwan Stock Exchange and the GreiTai Market in Taiwan. The company-pairs are selected from firms listed on the same market, conducting business in the same product field, and with sample correlation coefficient higher than 0.7. We choose 10 sample company-pairs covering 20 listed companies. The trading strategies mix both divergence and convergence rules. For the former, when the price ratio of the pair exceeds the moving average price ratio plus (minus) 0.3 standard deviation, we buy the strong and short the weak to anticipate the price ratio trend continues. For the latter, when the price ratio goes beyond the moving average price ratio plus (minus) 1.7 standard deviations, we buy the weak and short the strong, anticipating the price ratio to go back to normal. The exit rules are based on absolute dollar profit, absolute dollar loss, and prolonged position period. The research results show that the pair trading strategies are not risk-free. Risk arises when the price ratio trend runs adversely than as expected. To control the risk, our challenges lie in fine tuning the entry and exit rules. With larger sample size and more in-depth investigation, we expect that the profit/loss ratio of the stragtegy can be improved. Then the pair trading strategy will become a good alternative for conservative individual investors seeking low risk investment opportunities to participate in the securities markets in Taiwan.

In Rio De Janeiro, 1992, was the first document signed that meant a responsibility for industrial countries to decrease their emissions, United Nations Framework Convention on Climate Change (UNFCCC). Thirteen years later was the first legal binding document signed, the Kyoto protocol, and for the first time industrial countries all over the world was bound to decrease their emissions on greenhouse gases. Within the framework of this commitment, three flexible mechanisms (Clean Development mechanism, Joint Implementation and Emission trading) were introduced with the function to reduce the economical costs of the commitment. The flexible mechanisms Emission Trading (ET) is what this report is about. The report starts with a description of carbon dioxide and it’s effect on the environment, thereafter comes a background review of the national agreements who lies as a ground to the implementation of emission trading as a management control measure in Sweden and the rest of the world. Keywords : United Framework Convention on Climate Change, Kyoto protocol, Flexible mechanisms, Emission trading, carbon dioxide

The decisions of the federal government such as new legislation, bills and reforms can have serious implications for the financial markets, especially in terms of corporate profitability and shareholder value. As the overseers of federal agencies, U.S. Senators are arguably the most important participants in these decision making processes, in addition to being the most informed investors in the market. As such, Senators may be able to capitalize on their superior networks and information through stock trading. The portfolios traded on such insider information should generate abnormal returns against the market index. This study conducts an analysis of the abnormal returns on common stock purchases reported by U.S. Senators between 1995 and 2012. This paper recreates congressional buy portfolio using a consistent methodology throughout the entire sample period considered by earlier studies. While the sample size is reduced, the methodology used in this analysis relies on actual transactions dates to maximize accuracy. An analysis of the abnormal returns of the common stock investments of U.S. Senators during the period 1995 – 2012 shows that Senators are generally poor investors: purchases made by senators underperform the market index by approximately 3% a year.

Bank holding companies (BHCs) in the United States (US) have been recently required to report foreign exchange derivatives in two accounts. One account includes the foreign exchange derivatives held for trading while the other account contains the foreign exchange derivatives held for purposes other than trading. The objective of this study is to examine the factors that determine the sizes of these two accounts.<p> We propose that the size of the securities portfolio held for purposes other than trading is an indicator of the magnitude of the hedging operations by a US BHC. In particular, we are interested in the portfolio of foreign exchange derivatives held for purposes other than trading and we refer to this portfolio as the foreign exchange derivatives hedging account. Our proposition is consistent with Adkins, Carter and Simpson (2007) who regard the securities that are held for purposes other than trading as primarily used for hedging purposes. Thus, we use the foreign exchange hedging account to study the foreign exchange hedging behavior of BHCs and determine the factors that influence the magnitudes of the foreign exchange hedging accounts.<p> Hedging activities in general are very important for practitioners, regulators, and academics as evidenced by the extensive publicity and attention that has been given to interest rate risk and the extensive research that has been done to examine the factors that determine the magnitudes of interest rate hedging activities. Yet, little research has been devoted to examine the factors that determine the magnitudes of the foreign exchange hedging activities in US BHCs. One purpose of this study is to fill this gap in the literature.<p> Similarly, we propose that the size of the trading account of a BHC is an indicator of the magnitude of the trading operations. These operations are attracting the attention of academics, regulators, and practitioners as they can generate significant revenues to BHCs but they are sources of significant risks. For example, much of the surprisingly high revenues reported by major US banks in the first and second quarters of 2009 are credited to trading operations while revenues from other activities were significantly low. On the other hand, trading activities are largely blamed for several catastrophic financial events such as the collapse of the Baring Bank PLC and the financial crisis of 2008 which nearly leads to the collapse of the global financial system. One objective of this study is to improve our understanding of the foreign exchange derivatives trading and the factors that influence the magnitudes of the foreign exchange trading accounts at US BHCs. Given the importance of the trading operations it is surprising that little research has been done in this area.<p> The results of this study are derived from empirical data observed over the period from 1995 to 2007 inclusive. This data is obtained from the financial reports and statements of US BHCs. We use regression analysis to show that the notional amounts of the foreign exchange derivatives held in the hedging and trading accounts are related to various firm-specific and environmental factors. In particular, we argue that the net asset exposure, which measures the difference between the assets and liabilities denominated in foreign currency, and the net income exposure, which measures the difference between the interest income and interest expenses denominated in foreign currency, should be significant determinants of the notional amount of derivatives held in the hedging account. We propose that these two factors are indicators of a BHCs exposure to foreign exchange fluctuations and hedging should be designed to offset their influence on the value of assets or level of income. In addition, we propose that a BHCs size and level of capitalization affect the size of the hedging account.<p> Similarly, we propose that the notional amount of foreign exchange derivatives held for trading should be related to the same factors. In particular, we argue that the notional amount of derivatives in the trading account is related to the net asset exposure and the net income exposure as they indicate a BHCs involvement in international operations such as lending, deposit taking, risk management, and correspondent relationships in foreign countries. In our opinion, the larger the involvement in international operations the larger is a BHCs ability to trade foreign exchange derivatives.<p> This study makes several unique contributions. First, it shows that the net asset exposure and the net income exposure have positive and significant effects on both the hedging and the trading accounts. Second, we show that the capital ratio and the magnitude of the hedging and trading accounts are positively and significantly related. In addition, this study confirms that the magnitude of total assets is a positive and significant determinant of BHCs foreign exchange derivative securities held in either the hedging or the trading accounts. This result is consistent with previous studies such as Carter and Sinkey (1998), Brewer, Jackson and Moser (2001), Adkins, Carter and Simpson (2007), and Hassan and Khasawneh (2009).

The essays empirically show the impact of investors speculation and disagreements on the returns and trading volume of securities. The results also shed light on the central issues of price formation and investors’ trading motives in security markets. The first essay investigates whether the trading activities of retail investors affect option prices through volatility speculation. This essay empirically shows that higher retail trading proportions are related to lower delta-hedged option returns. The phenomenon is more pronounced before earnings announcements and among stocks with more time-varying and positively skewed volatility. The results suggest that retail investors speculate and pay a lottery premium on the expected future volatility, resulting in more expensive options in terms of higher implied volatilities. This systematic deviation of option-implied volatility from realized volatility suggests retail investor clientele as a behavioral-based driving force of volatility risk premium. The second essay investigates the motive of option trading. It is shown that option trading is mostly driven by differences of opinion, a finding different from the current literature that attempts to attribute option trading to information asymmetry. First, option trading around earnings announcements is speculative in nature and mostly dominated by small, retail investors. Second, around earnings announcements, option turnovers do not predict stock returns, once prior stock returns are controlled for. Third, regression results reveal that option trading is also significantly explained by differences of opinion at ordinary times. While informed trading is present in stocks, it is not detected in options. The third essay provides strong evidence of reduction in informational efficiency when there are short-sale constraints and disagreements. Post earnings announcement returns are found to be significantly lower for stocks with more dispersed opinions and stocks that are exogenously short-sale prohibited by the Hong Kong Stock Exchange, supporting Miller’s (1977) overvaluation hypothesis. The results also suggest short-sale constraint as an explanation to negative post earnings announcement drift.

The essays empirically show the impact of investors speculation and disagreements on the returns and trading volume of securities. The results also shed light on the central issues of price formation and investors’ trading motives in security markets. The first essay investigates whether the trading activities of retail investors affect option prices through volatility speculation. This essay empirically shows that higher retail trading proportions are related to lower delta-hedged option returns. The phenomenon is more pronounced before earnings announcements and among stocks with more time-varying and positively skewed volatility. The results suggest that retail investors speculate and pay a lottery premium on the expected future volatility, resulting in more expensive options in terms of higher implied volatilities. This systematic deviation of option-implied volatility from realized volatility suggests retail investor clientele as a behavioral-based driving force of volatility risk premium. The second essay investigates the motive of option trading. It is shown that option trading is mostly driven by differences of opinion, a finding different from the current literature that attempts to attribute option trading to information asymmetry. First, option trading around earnings announcements is speculative in nature and mostly dominated by small, retail investors. Second, around earnings announcements, option turnovers do not predict stock returns, once prior stock returns are controlled for. Third, regression results reveal that option trading is also significantly explained by differences of opinion at ordinary times. While informed trading is present in stocks, it is not detected in options. The third essay provides strong evidence of reduction in informational efficiency when there are short-sale constraints and disagreements. Post earnings announcement returns are found to be significantly lower for stocks with more dispersed opinions and stocks that are exogenously short-sale prohibited by the Hong Kong Stock Exchange, supporting Miller’s (1977) overvaluation hypothesis. The results also suggest short-sale constraint as an explanation to negative post earnings announcement drift.

Bank holding companies (BHCs) in the United States (US) have been recently required to report foreign exchange derivatives in two accounts. One account includes the foreign exchange derivatives held for trading while the other account contains the foreign exchange derivatives held for purposes other than trading. The objective of this study is to examine the factors that determine the sizes of these two accounts.<p> We propose that the size of the securities portfolio held for purposes other than trading is an indicator of the magnitude of the hedging operations by a US BHC. In particular, we are interested in the portfolio of foreign exchange derivatives held for purposes other than trading and we refer to this portfolio as the foreign exchange derivatives hedging account. Our proposition is consistent with Adkins, Carter and Simpson (2007) who regard the securities that are held for purposes other than trading as primarily used for hedging purposes. Thus, we use the foreign exchange hedging account to study the foreign exchange hedging behavior of BHCs and determine the factors that influence the magnitudes of the foreign exchange hedging accounts.<p> Hedging activities in general are very important for practitioners, regulators, and academics as evidenced by the extensive publicity and attention that has been given to interest rate risk and the extensive research that has been done to examine the factors that determine the magnitudes of interest rate hedging activities. Yet, little research has been devoted to examine the factors that determine the magnitudes of the foreign exchange hedging activities in US BHCs. One purpose of this study is to fill this gap in the literature.<p> Similarly, we propose that the size of the trading account of a BHC is an indicator of the magnitude of the trading operations. These operations are attracting the attention of academics, regulators, and practitioners as they can generate significant revenues to BHCs but they are sources of significant risks. For example, much of the surprisingly high revenues reported by major US banks in the first and second quarters of 2009 are credited to trading operations while revenues from other activities were significantly low. On the other hand, trading activities are largely blamed for several catastrophic financial events such as the collapse of the Baring Bank PLC and the financial crisis of 2008 which nearly leads to the collapse of the global financial system. One objective of this study is to improve our understanding of the foreign exchange derivatives trading and the factors that influence the magnitudes of the foreign exchange trading accounts at US BHCs. Given the importance of the trading operations it is surprising that little research has been done in this area.<p> The results of this study are derived from empirical data observed over the period from 1995 to 2007 inclusive. This data is obtained from the financial reports and statements of US BHCs. We use regression analysis to show that the notional amounts of the foreign exchange derivatives held in the hedging and trading accounts are related to various firm-specific and environmental factors. In particular, we argue that the net asset exposure, which measures the difference between the assets and liabilities denominated in foreign currency, and the net income exposure, which measures the difference between the interest income and interest expenses denominated in foreign currency, should be significant determinants of the notional amount of derivatives held in the hedging account. We propose that these two factors are indicators of a BHCs exposure to foreign exchange fluctuations and hedging should be designed to offset their influence on the value of assets or level of income. In addition, we propose that a BHCs size and level of capitalization affect the size of the hedging account.<p> Similarly, we propose that the notional amount of foreign exchange derivatives held for trading should be related to the same factors. In particular, we argue that the notional amount of derivatives in the trading account is related to the net asset exposure and the net income exposure as they indicate a BHCs involvement in international operations such as lending, deposit taking, risk management, and correspondent relationships in foreign countries. In our opinion, the larger the involvement in international operations the larger is a BHCs ability to trade foreign exchange derivatives.<p> This study makes several unique contributions. First, it shows that the net asset exposure and the net income exposure have positive and significant effects on both the hedging and the trading accounts. Second, we show that the capital ratio and the magnitude of the hedging and trading accounts are positively and significantly related. In addition, this study confirms that the magnitude of total assets is a positive and significant determinant of BHCs foreign exchange derivative securities held in either the hedging or the trading accounts. This result is consistent with previous studies such as Carter and Sinkey (1998), Brewer, Jackson and Moser (2001), Adkins, Carter and Simpson (2007), and Hassan and Khasawneh (2009).