WoS İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12573/394

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Author: search.filters.author.Tekin, HasanCOAR Access Rights: search.filters.coarAccessRights.open access

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Now showing 1 - 4 of 4
  • Article
    Citation - WoS: 6
    Citation - Scopus: 7
    Whether and When Did Bitcoin Sentiment Matter for Investors? Before and During the COVID-19 Pandemic
    (Springer, 2023-12-21) Aysan, Ahmet Faruk; Mugaloglu, Erhan; Polat, Ali Yavuz; Tekin, Hasan
    Using a wavelet coherence approach, this study investigates the relationship between Bitcoin return and Bitcoin-specific sentiment from January 1, 2016 to June 30, 2021, covering the COVID-19 pandemic period. The results reveal that before the pandemic, sentiment positively drove prices, especially for relatively higher frequencies (2-18 weeks). During the pandemic, the relationship was still positive, but interestingly, the lead-lag relationship disappeared. Employing partial wavelet tools, we factor out the number of COVID-19 cases and deaths and the Equity Market Volatility Infectious Disease Tracker index to observe the direct relationship between a change in sentiment and return. Our results robustly reveal that, before the pandemic, sentiment had a positive effect on return. Although positive coherence still existed during the pandemic, the lead-lag relationship disappeared again. Thus, the causal relationship that states that sentiment leads to return can only be integrated into short-term trading strategies (up to six weeks frequency).
  • Article
    Citation - WoS: 8
    Citation - Scopus: 11
    The Ascent of Geopolitics: Scientometric Analysis and Ramifications of Geopolitical Risk
    (Taylor & Francis Ltd, 2022-04-18) Aysan, Ahmet Faruk; Polat, Ali Yavuz; Tekin, Hasan; Tunali, Ahmet Semih
    In recent years, geopolitical risk (GPR) has been a crucial factor in investment decisions and stock markets. Therefore, we explore the research on the GPR by employing bibliometric and scientometric analytical techniques. We find 366 scientific contributions in December 2021 from the Scopus database by searching 'Geopolitical risk' in abstracts, keywords, and titles. Our findings show that GPR research has gained momentum in the last three years. Specifically, the journal Defence and Peace Economics has one of the highest numbers of research and citation on GPR. Authors in Asia also dominate the GPR literature. Overall, this study contributes to the literature by presenting the existing research that may give new insights for prospective studies in GPR.
  • Article
    Citation - WoS: 6
    Citation - Scopus: 14
    Is Saving Vital? Evidence from the Financial Crisis
    (Univ Oviedo, 2020-03-11) Tekin, Hasan; Polat, Ali Yavuz
    We use a sample of 8,561 firm-years from the highly regulated Main Market (MAIN) and relatively unregulated Alternative Investment Market (AIM) in the United Kingdom to analyse the impact of financial restrictions on optimal cash holdings in the context of financial crises. Employing system generalised methods of moments, we find that AIM firms have a faster adjustment speed of cash as confirmed by precautionary and transaction motives over 2002-2017. However, AIM firms decrease (increase) their adjustment speed of cash more than MAIN firms during (after) the financial crises.
  • Article
    Citation - WoS: 9
    Citation - Scopus: 25
    Do Market Differences Matter on Dividend Policy?
    (Elsevier, 2021-06) Tekin, Hasan; Polat, Ali Yavuz
    We investigate the dividend policies of firms in the United Kingdom to understand whether firms in different markets use dividends as a signaling or disciplining device. The sample consists of 1247 firms from the highly regulated Main Market (MAIN) and relatively unregulated Alternative Investment Market (AIM) for the period 2002-2017. We find that firms in AIM pay lower dividends than their MAIN counterparts. However, during turbulence, AIM firms decrease dividends lower than MAIN firms. In line with the signaling hypothesis, AIM firms with increased profitability are more likely to increase dividends. These results suggest that AIM firms depend more on the signaling feature of the dividends, whereas MAIN firms use dividends as a disciplining device to limit managerial discretion. Specifically, we find that AIM firms facing bigger agency problems pay lower dividends compared to other AIM firms, in line with the outcome view of agency theory. Copyright (C) 2020, Borsa Istanbul Anonim Sirketi. Production and hosting by Elsevier B.V.