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Neural Networks in R
Arzumanov, Eduard ; Bašta, Milan (advisor) ; Žižka, David (referee)
The aim of this work was to present the issue of neural network, which is still, despite the fact it exist and has been applied for several years, remains quite unknown for a considerably big part of public and academical environment. The aim of the practical part was to verify via practical application if neural network are truly a better instrument of statistical analysis, than the commonly used ones, especially when the goal is to analyze and describe complex processes and relationships between them. Further aim of the work was to investigate and describe the relationships between the development of trading volumes of Apple shares and the shares of competitive companies regarding the market of smart phones such as Google, HTC, Nokia, Samsung using neural network models. The attainment of these goals was realized through a rather extensive description of neural networks theory as well as the presentation of valuable theoretical tools for avoiding the frequent barriers occurring during the practical implementation. This practical application was realized via software called R, which has widely spread lately due to its availability and a vast range of flexibility, which is provided to users. The value of this work is familiarization and the creation of an integrated knowledge within readers about the issue of neural networks and the deliverance of a proof, that neural networks are indeed a better tool compared to the commonly used ones (ARMA models, linear regression). The author of the work gained a lot of useful knowledge about neural networks, learned how to use them in practice especially in the environment of R software, by which he shifted his proficiency with the current software to a whole new level.
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Portfolio optimization
Arzumanov, Eduard ; Šindelářová, Irena (advisor) ; Chýna, Vladislav (referee)
Nowadays, when the financial sector influences directly or indirectly nearly every part of person's life, when inflation is taken as a normal phenomenon, when we are witnessing bankrupts of different companies, banks and other financial institutions almost on a daily basis due to the incorrect managing of the financial assets or due to the incorrect estimation of overall economic development, more and more often one should consider how to manage his funds to prevent their depreciation or even how to use them to increase its value. For these reason investment into securities has become one of the most common ways of increasing the value of one's financial funds. Particularly -- one way of investment is becoming more and more popular nowadays - financial portfolio investment. That is why this thesis not only will introduce the basic principles and rules of portfolio investment, diversification and the concept of risk (in theoretical part), but will also demonstrate how is the diversification of a portfolio done in practice. The example of portfolio optimization is done using multi-criteria decision analysis applied to a model, designed in MS EXCEL with help of VBA environment.
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