Never before in history has the amount of international trade been higher or more efficient than it is today. The fastest growing type of trade is the speculative currency trading, searching for instant profit based only on the anticipation of the variations in currency exchange rates. When currency speculation becomes an influential part of the capital flows it becomes harmful and creates instability of currency systems. Exchange rates starts to fluctuate due to the will and anticipation of speculators rather than the economic health of the country associated with the currency. This has led to recurring currency crises all over the world and an increased interest in regulatory mechanisms. One of the most discussed mechanisms proposed to handle this harmful evolution of the foreign exchange markets is the Currency Transaction Tax (CTT). The CTT stipulates a low tax (0.1 per cent) on all currency transaction to curb the incitement of short-term speculation based on a large amount of smaller transactions. The purpose of this thesis is to examine whether an implementation of a CTT is compatible with the EU treaties. This purpose consists of two research questions; whether the CTT is in conformity with the substantive law of the EU, more precisely the free movements of capital, and if the CTT is in conformity with the Economic and Monetary Union (EMU) and the exclusive power of the European System of Central Banks (ESCB) over monetary policy. Since this thesis aims to identify if the CTT is in conformity with existing legislation, the traditional doctrinal method is used for identifying and analysing potential difficulties with the CTT and to interpret these provisions in the light of ECJ case law and literature. The thesis concludes that the CTT is in conformity with the EU treaties. It does however require the full cooperation of the ESCB and ECB to achieve the objectives; to create a more stable currency market. The CTT is ready to implement.

La thèse propose une esquisse des enjeux juridiques de l'adoption d'une taxe sur les transactions financières par le biais de la coopération renforcée en Europe. Les recherches portent plus précisément sur la technicité fiscale de la conception de cette imposition levée sur les transactions financières et les défis juridiques qui dérivent de son adoption par le biais de la coopération renforcée. La taxe, telle que conçue ne présente pas d'éléments de nature à la rendre contraire au droit international et européen et dans quelle mesure le cadre institutionnel qui l'accueille, celui de la coopération renforcée, est susceptible de remédier à ces possibles obstacles. La taxe sur les transactions financières telle que conçue par Tobin est destinée à s'appliquer par une communauté ample de juridictions fiscales. Son adoption à l'échelle régionale pose des problèmes juridiques qui tiennent à deux chefs. D'une part, l'imposition d'un secteur mobile et internationalisé dans son activité est confrontée à la planification fiscale d'évitement de l'impôt, facteur fragilisant les attendes sur son potentiel fiscal. D'autre part, l'extraterritorialité de l'imposition, qualité inhérente aux contours conceptuels de la taxe produit des effets dont la justification, tant en droit international et européen, primaire que dérivé, n'est pas aisément obtenue. Les difficultés découlant de la technicité fiscale de l'imposition ne s'épuisent pas dans les arguments précités. Elles demeurent intimement liées à l'élaboration d'une politique fiscale européenne de répartition de ressources fiscales entre États membres. / This thesis stems from European Taxation and it aims at providing for a legal appraisal of the contemplated introduction of a EU Financial Transaction Tax (FIT). The thesis, divided in three parts, is dedicated to the 2013 FIT Proposal, tabled in by the Commission and gaining support among some EU Member States, which wish to proceed by Enhanced Cooperation in this area. Part I of the thesis sets up the stage, focuses on interpreting the draft Proposal, and seeks for the "missing links": those unresolved issues, raised by tax academics, for making the tax legally consistent and coherent. Modelling an efficient and fair financial transaction tax is a delicate affair for tax experts. Within this appraisal, inconsistencies and incoherence, in the actual wording of the Proposal, have been overviewed. Part II focuses on the alleged infringement of international law, primary and secondary from FTT's implementation. Beyond the academic interest, by delving into that area of law, the conclusions drawn may be ground for further reflexion in regard of tax payers' protection. In the chapters that follow, we scrutinize the general institutional conditions granting competence to the EU for harmonising indirect taxes and we survey the requirements to be met in the specific legal frame of the Enhanced cooperation. More, we shed some light on the FTT's shape under the 2013 Proposal in regard of the European Treaties and secondary law.

In February 2013, eleven Member States agreed to adopt the Commissions' Proposal for a Council Directive implementing enhanced cooperation in the area of financial transaction tax, COM (2013)71 final. This article reviews three thematic areas frequently discussed by practitioners and academia alike on the impact that the Proposal could have on companies operating within participating Member States. This includes the impact on capital and related costs, business strategy and compliance considerations. I ask the question whether the unintentional repercussions could be mitigated by making adjustments to the current Proposal including the expansion of exemptions and the adoption of an implementation framework that takes inspiration from the Value Added Tax System that is already implemented across Member States. (author's abstract) / Series: WU International Taxation Research Paper Series

The diploma thesis deals with the taxation of financial institutions focused on European Union. The thesis provides a short view on the inception of financial crisis in USA and the costs spent by national governments on rescue of systemic important institutions on the market. The history of banking tax concept is briefly summarized on theoretical level and also two real historical examples of taxation in financial sector are provided. The main part of the work is focused on the current proposal of European Commission and the impact of its implementation. The practical part of diploma thesis is based on particular model examples how this proposal would work in practice.

Banking crisis and following sovereign debt crisis are the cause of some changes on the financial market. This thesis is mainly focused on the debt crisis and its impact on financial sector stability. Roots, consequences and probable solutions of the debt crisis are also examined. Among analysed solutions were included proposals for financial transaction tax, stability bonds and regulation under new concept of CRD IV, bail-in and federalization of the eurozone. Analysed are also ratings, fiscal policy and optimality of the euro currency areas and its impact on stability of financial institutions. According to results, some proposals could be contrary to each other if implemented in its present form. Or it can increase moral hazard of financial institutions. Another consequence is establishment of new regulations. On the other hand, positive is that financial institutions have endured the sovereign debt crisis.

The submitted diploma thesis deals with the taxation of financial institutions, focusing on current trends in this field. Its aim is to analyze and compare implemented forms of taxation of financial institutions in selected countries. The first chapter provides the analysis of taxation of financial institutions in the Czech Republic and focuses on the specifics related to corporate income tax and value added tax. The second chapter discusses the approach to the taxation of financial institutions in selected countries where the focus is on the financial stability contribution, financial activities tax and financial transaction tax. The third chapter deals with the development of the implementation of the financial transaction tax in the European Union. Moreover, briefly describes the process of these discussions and examines the current proposal for a Council Directive implementing enhanced cooperation in the area of financial transaction tax. The thesis also contains an approximate prediction of tax revenues in case that the Czech Republic implemented the European financial transaction tax.

本文使用 1981 年 1 月 5 日至 1997 年 5 月 31 日台灣加權股價指數以及交易股數的資料探討台灣股市的時間序列特性，並且針對政府對股市的干預政策檢定政策干預的有效性。本文採用的實證方法包含 Augmented Dickey-Fuller(ADF)單根檢定，Perron 結構性改變檢定， ARCH 效果檢定，干預分析(Intervention Analysis)以及 Granger 因果關係檢定。實證檢定的結果如下： 1、在單根檢定方面，股價指數、交易股數和股價指數變異數三個時間序列都是一階穩定序列。 2、在 Parron 結構性改變檢定方面，股價指數、交易股數和股價指數變異數三個時間序列在 1990 年 5 月到 10 月之間曾經發生明顯的結構性改變。 3、在 ARCH 效果檢定方面，股價指數和交易股數二個時間序列的殘差項都有 ARCH(1)效果存在，而股價指數變異數的殘差項不存在 ARCH(1)效果。 4、在干預分析方面，穩定基金對股價指數的干預效果不顯著。 在漲跌幅限制方面，漲跌幅限制的變動對股價指數、交易股數及股價指數變異數的干預效果都不明顯。 在證卷交易稅稅率改變的干預分析方面，證卷交易稅稅率改變對交易股數和股價指數變異數沒有影響，但是證交稅稅率變動和股價指數呈現正向的關係。 5、在 Granger 因果關係檢定方面，本研究發現漲跌幅限制改變和股價指數漲跌二者互為因果，但是股價指數對漲跌幅的影響較大。 在證卷交易稅稅率改變與股市的因果關係方面，本研究發現股價指數的漲跌是證交稅稅率改變之因，顯示主管機關的證交稅稅率政策是受股市的市場狀況所左右。 / In this paper, I examine the effectiveness of official intervention in Taiwan's equity market. I consider the security transaction tax, price limit and stabilization funds as examples. The nonstationarity and structural changes of equity index time-series process were first detected and detrended. The Autoregressive Conditional Heteroskedasticity (ARCH) model is employed to examine the intervention effectiveness, since it allows for a formal test of changes in the index mean level, index conditional variance or both, in response to the changes of security transaction tax and price limit. The results implies that policy authority adjusted security transaction tax and price limit in accordance to the change of equity index level. I also find that the imposition of security transaction tax and price limit have no significant effect on reducing the equity index volatility.

Vu la nature complexe de la matière fiscale et son lien étroit à un environnement évolutif, le litige entre contribuables et administration devient une réalité inéluctable. Aujourd’hui, la pratique fiscale révèle que la voie juridictionnelle n’est pas toujours la meilleure façon de satisfaire aux besoins des litigants. Sous cet angle, le fisc veut instaurer de nouveaux instruments de règlement du litige, dit modes amiables, pour des nouveaux rapports avec le contribuable. En effet, la DGI examine aujourd’hui les différentes dimensions de ses litiges avec les contribuables, dont le but est d’aboutir à une gestion participative. Pour ce faire, elle cherche à mettre en place une pratique qui fournit de nouvelles manières d’aborder les difficultés. Il s’agit d’une nouvelle approche qui se focalise sur les éléments les plus importants du litige, elle propose un mode de règlement amiable de style coopératif, visant d’abord à identifier les intérêts mutuels pour une solution consensuelle. Cette pratique non juridictionnelle du règlement de litige évolue très rapidement. Elle a suscité un débat passionnant au sein de la théorie du droit public, tant sur le plan du fond que sur le plan de la forme. Les spécialistes ont débattus en effet les différentes possibilités juridiques de l’intégrer dans les procédures et de la mettre en examen pour tester sa comptabilité avec le système fiscal. Au bout du compte, la pratique qui a été admise par la DGI est celle de règlement négocié du litige, aboutissant à une transaction. Cette évolution reflète la montée en puissance de l’autorité de la fonction consultative en matière fiscale. En pratique, cela entraîne l’invention des instruments administratifs ou juridiques propres à l’administration fiscale qui facilitent le mécanisme de règlement du litige. L’incorporation des pratiques amiables reconnaît l’intérêt croissant de faire face au litige, mais quelques améliorations restent encore à réaliser, car le mécanisme a besoin d’un appui législatif et juridique, mais aussi d’une véritable volonté d’éliminer tout litige de la part du contribuable. / Given the complex legal nature of the tax and its close connection to a changing environment in Morocco, the conflict between the tax administration and its users become an inescapable reality. The judicial process was and is the traditional tool to adjust, but the Moroccan tax practice today reveals that this route is not always the best way to meet the needs of litigants. From this angle, the Moroccan tax legislator wants to introduce new tax disputes resolution tools for new relations between the tax authorities and taxpayers. The Moroccan tax administration examines now the different dimensions of his disputes with the different categories of taxpayers. The long term goal is to achieve participatory management of disputes. To this end, the DGI seeks to put in place following the new instruments that provide new ways to see the disputes that may arise between different tax services and their users. The current approach focuses on the most important elements of the conflict between the administration of the taxpayer, and that impact on how to approach and manage. This approach offers alternative methods of settling tax disputes cooperative style first to identify mutual interests for a consensual solution. These non-judicial methods of settling tax disputes evolve very quickly in the Moroccan case. They aroused passionate debate in the theory of public law, both on the substance of the plan on the level of form. Moroccan specialists have indeed discussed the various legal possibilities of integrating them into the overall system of dispute resolution, which have been under investigation to test their compatibility with the tax system. The accepted and mastered by DGI modes are negotiated settlement of tax disputes techniques such as negotiation and transaction. Other collection methods and under different and innovative forms in tax matters are being explored to integrate into the system. This reflects the rise of the authority of the advisory function in tax matters. In practice, this leads to the invention of administrative or legal instruments to the tax authorities that facilitate dispute resolution mechanism. Thus, the incorporation of alternative dispute resolution recognizes the growing interest to deal with tax disputes, but some improvements are still to be made, since the mechanism needs a legislative and legal support in Morocco, but also a real willingness to eliminate tax disputes from Moroccan citizens.

The goal of my thesis on Supervision over the banking industry in the EU member states is to describe critically and to define newly engendering concept of the banking union. It is a very actual topic because the effective mechanism creation, which should solve problems of the European banking sector, is currently one of the primary goals of the European Union. The study is divided into three chapters. The first chapter is the theoretical one. The definition and differentiation of the essential terms such as supervision and surveillance can be found there. Further the basic theoretical modules can be found there, from which it is possible to stem during the banking supervision implementation in practice. The second and the third chapters are the analytical parts. The introduction of the second chapter glances at the backgrounds of the legislative proposals acceptance in this area. Afterwards the chapter is already focused on four pillars of the proposed Banking union. The first pillar is formed with so called "single rule book", thus the uniform regulatory rules that are the implementation of the requirements expressed in so called Basel III. In this part of the study there is outlined why it is not quite happy at present to burden the credit institutions in the European Union even more through...

本研究第一部份為確定性的資產訂價模型，探討證券交易所得稅與證券交易稅對股票價格的影響。如同資產價格方程式，其均衡價格為未來各期股利之貼現值的總和。所不同的是一般資產價格方程式之貼現率即為市場利率，但本研究特別引進資產存量動態調整方程式與政府預算限制式，說明除了市場利率以外，強調證券交易所得稅、證券交易稅與代表性個人之週轉率均為影響貼現率的主要因素。由於模型描述代表性個人具有遠瞻(forward-looking)的特性，所以當期暫時性的稅率變動不會影響股票價格，會影響股票價格的只有未來的租稅政策。另外，本研究亦得到與李嘉圖定理相似的中立性假說：只要租稅現值保持固定不變，即使資本利得稅與證券交易稅如何調整與變動，都不會影響其均衡價格。 為了瞭解股票週轉率的函數型態。假設其為下一期股票報酬率與租稅的函數，以台灣地區1982年1月至2001年1月的月資料，使用兩階段的研究方法分別探討租稅對股票報酬率與週轉率的影響，目的是確認：租稅除了會直接的影響股票價格外，是否會透過週轉率而間接的影響股票價格。因此本研究第二部份摒除週轉率與政府政策為外生的假設，另以實證分析租稅對股票報酬率與週轉率的影響，以補基本理論模型之不足，並進行有趣議題之分析。 首先由Ganger因果關係檢定得知：週轉率領先於政府訂定的證券交易稅稅率，亦即週轉率過去的落遲項會影響到當期的證券交易稅稅率；且由相關係數得知二者呈正相關。故政府訂定的證券交易稅稅率視過去的週轉率而定，過去的週轉率愈高，政府當期訂定的證券交易稅稅率愈高，以企圖抑制股市的不健全發展。再者，由於台灣股票報酬率的時間序列資料具有自我迴歸條件非均齊變異數(autoregressive condition heteroskedasticity，簡稱ARCH)的現象，故異於其他相關研究的實證方法，另經由比較各種ARCH族模型的實證結果，選取出一套考慮風險貼水(risk premium)之最佳配適的兩階段ARCH(1)-M模型進行實證分析。 實證結果顯示：任何一個ARCH(1)-M的模型，皆存在顯著的風險貼水效果。而預期未來的與當期的證券交易稅對當期的股票報酬率均為直接的負面影響，但以前者影響較為顯著，後者的影響則視顯著水準而定，因此政府調降或調高當期的證券交易稅稅率，與股市之榮枯並無確定性的直接關係，此結果與一般學者的觀點不謀而合。此外，當期的週轉率租稅彈性為-0.0646，其值顯著為負，且絕對值小於一，表示缺乏彈性，雖然租稅會間接地透過週轉率影響股票價格，但影響並不大，而且政府若鑒於過去的週轉率太高，要以租稅抑制當期的股市投機風氣，其成效亦不彰。至於證券交易所得稅因宣告(或施行)的期間極為短暫，故對當期的股票報酬率影響不顯著。換言之，風險趨避程度、證券交易稅、預期報酬率、週轉率與股票價格之間具有相互連動的關係。是故，證券交易稅對股票價格的影響，視風險趨避程度、證券交易稅稅率、週轉率之租稅彈性與週轉率之預期報酬彈性而定。 除此以外，本研究第三部份亦考慮政策的不確定性與政策的變動以建立不確定性的資產訂價模型，模擬分析結果顯示：若原先政府施行的租稅過程愈具持續性，則一旦政府的租稅政策瞬間改變時，投資人愈無法將股票價格-股利比值對租稅的反應，事先地考慮於股票投資的決策當中，所以租稅政策衝擊的反應較大。簡言之，投資人預期的稅率與實際施行的新稅率愈相近時，租稅政策衝擊的反應最小。因此第三部份的結果亦與第一部份的基本數學模型(認為當期暫時性之稅率變動不會影響當期的股票價格)，以及第二部份的實證結果(發現當期證券交易稅稅率變動與當期股市之榮枯並無確定性之關係)相一致。 第一章 緒論……………………………………………………………………001 1.1 研究動機與目的………………………………………………………001 1.2 研究方法………………………………………………………………004 1.3 研究結構………………………………………………………………011 第二章 我國證券交易課稅制度沿革…………………………………………014 2.1 我國證券交易所得稅制度沿革………………………………………014 2.2 我國證券交易稅制度沿革……………………………………………021 2.3 各國證券交易課稅制度比較…………………………………………024 第三章 證券交易課稅的文獻探討……………………………………………031 3.1 證券交易所得稅的文獻探討…………………………………………031 3.1.1 關於證券市場的文獻探討……………………………………031 3.1.2 關於投資及儲蓄的文獻探討…………………………………040 3.1.3 關於經濟效益的文獻探討……………………………………042 3.1.4 關於稅制及稅收的文獻探討…………………………………046 3.2 證券交易稅的文獻探討………………………………………………050 3.2.1 國外文獻探討…………………………………………………050 3.2.2 國內文獻探討…………………………………………………053 第四章 確定性的資產訂價模型……………………………………………… 058 4.1 基本理論模型…………………………………………………………058 4.2 租稅效果………………………………………………………………064 4.3 中立性的假說…………………………………………………………069 第五章 台灣實證研究—資料處理與分析…………………………………… 073 5.1 資料來源與說明………………………………………………………074 5.2 檢定……………………………………………………………………076 5.2.1 單根檢定—ADF 檢定…………………………………………076 5.2.2 常態分配檢定…………………………………………………080 5.2.3 自我相關檢定—Ljung-Box Q(L-B Q)檢定…………………081 5.2.4 序列相關 LM 檢定……………………………………………082 5.2.5 ARCH LM 檢定…………………………………………………082 5.2.6 Granger 因果關係檢定………………………………………086 5.2.7 當期股票報酬率與未來各期證券交易稅稅率的相關係數…093 第六章 台灣實證研究—兩階段 ARCH 族實證模型………………………… 095 6.1 基本條件平均數方程式的設定與分析………………………………095 6.1.1 傳統自我迴歸模型……………………………………………095 6.1.2 自我迴歸模型的殘差分析……………………………………096 6.2 條件變異數方程式的設定……………………………………………101 6.2.1 ARCH 模型……………………………………………………102 6.2.2 ARCH-M 模型…………………………………………………103 6.3 估計方法與檢定………………………………………………………105 6.4 第一階段之股票報酬率的 ARCH 族模型估計與分析………………106 6.4.1 實證模型………………………………………………………106 6.4.2 實證結果與分析………………………………………………113 6.5 兩階段模型的估計與分析……………………………………………114 6.5.1 實證模型………………………………………………………114 6.5.2 實證結果與分析………………………………………………119 第七章 不確定性的資產訂價模型…………………………………………… 130 7.1 不確定性的租稅政策與政策變動……………………………………130 7.2 模型的模擬與分析……………………………………………………136 第八章 結論與未來的研究方向………………………………………………151 8.1 結論……………………………………………………………………151 8.2 未來的研究方向………………………………………………………155 附錄A 股票價格函數滿足終極條件的證明…………………………………158 附錄 B 股票價格函數為單一固定點的證明…………………………………160 參考文獻…………………………………………………………………………163 / This paper works out the effect of capital gains tax and stock transaction tax on share prices. In the generality of cases, the equilibrium share price is shown to equal the discounted sum of future dividends. In this paper, we emphasize that tax policy is a driving force in determining the discount rate and market turnover rate also plays an important role in determining the effects of policy. We show that temporary changes in policy have little effect on current stock price; only perceived policy in the future has price effect. We also show that a permanent shift in tax policy exerts only level effect, but no growth effect, on stock price. Using monthly data from Taiwan, our empirical results indicate that changes in stock turnover rate often leads changes in transaction tax, and both are positively correlated. This result implies that government policy often reacts to market volatility instead of the other way around. Since the data exhibit autoregressive conditional heteroskedasticity, we employ a two stage ARCH(1)-M model as our empirical strategy. Our results show that the price effect of transaction tax is significant, with the expected change in future tax especially so. The results also indicate that expected stock returns have positive and important effects on market turnover rate. Overall, the policy effect on stock price depends on the tax rate, the degree of risk aversion, sensitivity of turnover rate to policy and the expected stock return. The analysis so far assumes that the tax policy is certain, when in fact it is hardly the case. The 1989 fiasco and the recent flip-flop of the government are vivid testimonies of the volatile nature of the government policy. The third part extends the model to a stochastic environment and examines the consequences when a long-standing unequivocal tax policy suddenly and unexpectedly shifts to a stochastic regime. This type of regime shift seems to characterize the recent experience in Taiwan. Our results show that the shape of the pricing function under stochastic regimes depend on the persistence of the tax process. For tax rates that are lower than the unconditional mean of the process, the price is lower than the certainty case because the expected tax rate is higher over this interval. As the tax process becomes more persistent, the expected duration of the tax rate lengthens and the pricing function becomes negatively sloped. Notice that the slope of the pricing function (i.e., the tax elasticity of the price-dividend ratio) is flatter than the certainty case because in a stochastic regime consumers always take into account the possibility of tax changes, no matter how small the probability is.