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Yayın Investment behaviour in Turkey: perception towards cryptocurrency(PressAcademia, 2021-07-30) Teker, Dilek; Deniz, E. AsenaPurpose- Our health and social lives and financial markets have been significantly influenced by the Covid-19 pandemic. Even though the coronavirus' overall economic impacts are not yet known, a financial market reaction to the pandemic is observed. Studies show that the pandemic has strong impact on stock markets and cryptocurrency markets and also increases uncertainty. Cryptocurrency known as virtual money is one of the most important developments of digitalization. Cryptocurrencies discussed during the past few years and, in particular, a new investor portfolio, are highly popular. Cryptocurrency markets began to pickup with the arrival of bitcoin. These markets have started to be demand like stock markets. The purpose of this study is to establish the elements influencing individual financial investment decisions both on the cryptocurrency market and in the stock markets, with the performance of cryptocurrencies growing positively in conjunction with the pandemic in 2020. Methodology- While making financial decisions, individuals want to know how the market is carried over and they act accordingly. For this reason, both stock and crypto money markets have been examined in order to see the behaviour of individuals. The objective of this research is to establish the elements that influence individual financial investment decisions on both cryptocurrency and equity markets, since cryptocurrencies have a positive increase in performance parallel to the globally lower pandemic interest rates in 2020.In the study, it was collected with the data by survey technique. The survey examined investor behaviour in financial markets based on individual investor demographics on 428 individual investors. Findings- The study, which was collected with the participation of 428 individual investors with the survey technique, shows that the majority of crypto money users are between the ages of 25-34 according to gender, age and education level and are university graduates. When the data of the survey applied to determine the investment tendencies of individual investors are evaluated, it has been observed that the investors are mostly willing to invest in foreign exchange and cryptocurrencies arouse considerable curiosity due to their high return performance. However, participants believed that cryptocurrency market is riskier than stock markets. In our article, the level of perception about how cryptocurrencies are an investment tool is also not clear, and it has been revealed that investors primarily obtain information about this market through social media channels. Conclusion- In the financial sector, where competition is intense, financial decisions taken by investors are of great importance. Increased pandemic risk factor has led to ambiguities in investment decision-making. Global uncertainty continues despite the development of the vaccine. Corruption in cryptocurrency exchange, often mentioned in recent days, led individuals to research and to learn more about themselves in this area, who are investing in this industry or planing to do so. Our survey on investor behaviour in financial markets, which was carried out with the participation of 428 people over the social platform, was also prepared to be more on crypto money. According to the survey, developments regarding cryptocurrencies showed that the State had to regulate. The recent news about corruption reveals that cryptocurrency markets will continue to be precepted negatively for some time, but it shows that incidents are rapidly forgotten.Yayın Tweet sentiment analysis for cryptocurrencies(IEEE, 2021-10-13) Şaşmaz, Emre; Tek, Faik BorayMany traders believe in and use Twitter tweets to guide their daily cryptocurrency trading. In this project, we investigated the feasibility of automated sentiment analysis for cryptocurrencies. For the study, we targeted one cryptocurrency (NEO) altcoin and collected related data. The data collection and cleaning were essential components of the study. First, the last five years of daily tweets with NEO hashtags were obtained from Twitter. The collected tweets were then filtered to contain or mention only NEO. We manually tagged a subset of the tweets with positive, negative, and neutral sentiment labels. We trained and tested a Random Forest classifier on the labeled data where the test set accuracy reached 77%. In the second phase of the study, we investigated whether the daily sentiment of the tweets was correlated with the NEO price. We found positive correlations between the number of tweets and the daily prices, and between the prices of different crypto coins. We share the data publicly.Yayın Gender differences in risk perception and investment behavior(PressAcademia, 2023-02-01) Teker, Dilek; Teker, Suat; Demirel, EsinPurpose- Gender differences in investment behavior have been reported by various studies. Behavioral investing seeks to bridge the gap between psychology and investing. Behavioral finance is becoming more predominant in the financial and investment industry. The general concept of behavioral finance suggests that investors do not necessarily make rational investment decisions. Many results of behavioral finance studies show that men and women have different strengths and weaknesses in terms of skills required for investment management. This study focuses on the role of gender in risk perception and investment behavior, with a sample size of 288 respondents. In other words, the aim of the research is to reveal whether there is a difference in investment preferences between men and women. It is investigated whether the gender factor affects investment decision-making behavior. Using an experimental finance approach, the relationship between gender diversity and investment decisions is examined. Methodology- This study focuses on the role of gender in risk perception and investment behavior, with a sample size of 288 respondents. Gender differences in investment behavior have been reported by various studies. Behavioral investing seeks to bridge the gap between psychology and investing. Behavioral finance is becoming more predominant in the financial and investment industry. The general concept of behavioral finance suggests that investors do not necessarily make rational investment decisions. In accordance with the aim of the research, to reveal whether there is a difference in investment choices between men and women, the investment differences between the genders are shown using the graphic method in this study. Then, the normality test and Mann-Whitney U test were applied by using 288 respondents, respectively. Findings- According to the graphic method results it is found that women generally prefer to invest between 10% and 25% of their monthly income in financial markets. T cryptocurrency market is riskier than the stock market for both women and men. Women experience more stress than men at the thought of losing money because of their investment choices. The Cronbach Alpha coefficient for estimating the reliability of the scale employed for respondents’ investment preference was found to be 0.701. The results of data processing obtained by the value of the Kolmogorov-Simirnov significant which means the data were not normally distributed residuals. According to Mann-Whitney U test results, it is underlined that the gender factor differs according to the following variables based on 95% significance level: Conclusion- Survey with different aspects of questions focus on investors’ risk perception. “How often do you check your investments?”; “What is your approximate holding time of an investment instrument?”; “What percentage of your monthly income would you prefer to invest in financial markets?”; “The thought of losing money because of my investment choices is stressed me out”; “Have you ever invested in Cryptocurrencies?”; “What is the most suitable option for your knowledge of the cryptocurrency market?”. It is concluded that there is a significant difference between gender and investment preference.Yayın Determinants of cryptocurrency price movements(Higher Education and Innovation Group (HEAIG), 2019-11) Teker, Dilek; Teker, Suat; Özyeşil, MustafaCryptocurrency is a recent and popular topic that attracts the interest of investors and fund managers. Beyond the market discipline, researchers question the interaction between cryptocurrecies and macroeconomic variables. This study we focus on how the changes in gold and oil prices effect the daily price movements of different cryptocurrencies. The daily database includes prices of the cryptocurrencies of Bitcoin, Tether, Ethereum Litecon and EOS for the period between August 1, 2017 and April 3, 2019. Initially the stationarity of the series is tested by Ng and Perron (2001) method. The existence of the cointegration relationship between the series is tested by Johansen (1988) technique. The presence of causality relationships between the series is investigated with the Dolado and Lütkepohl (1996) causality test. The paper explains the details of the empirical findings.












