Blockchain Papers

Nuri C. Onat, Rateb Jabbar, Murat Küçükvar, Noora Fetais

No abstract is available for this record.

Ahmed Jeribi, Sangram Keshari Jena, Amine Lahiani

The study investigates the safe haven properties and sustainability of the top five cryptocurrencies (Bitcoin, Ethereum, Dash, Monero, and Ripple) and gold for BRICS stock markets during the COVID-19 crisis period from 31 January 2020 to 17 September 2020 in comparison to the precrisis period from 1 January 2016 to 30 January 2020, in a nonlinear and asymmetric framework using Nonlinear Autoregressive Distributed Lag (NARDL) methodology. Our results show that the relationship dynamics of stock market and cryptocurrency returns both in the short and long run are changing during the COVID-19 crisis period, which justifies our study using the nonlinear and asymmetric model. As far as a sustainable safe haven is concerned, Dash and Ripple are found to be a safe haven for all the five markets before the pandemic. However, all five cryptocurrencies are found to be a safe haven for three emerging markets, such as Brazil, China, and Russia, during the financial crisis. In a comparative framework, gold is found to be a suitable safe haven only for Brazil and Russia. The results have implications for index fund managers of BRICS markets to include Dash and Ripple in their portfolio as safe haven assets to protect its value during a stock market crisis.

Abdelkader Derbali, Kamel Naoui, Lamia Jamel

Purpose The purpose of this paper is to examine empirically the impact of COVID-19 pandemic news in USA and in China on the dynamic conditional correlation between Bitcoin and Gold. Design/methodology/approach This paper offers a crucial viewpoint to the predictive capacity of COVID-19 surprises and production pronouncements for the dynamic conditional correlation (DCC) among Bitcoin and Gold returns and volatilities using generalized autoregressive conditional heteroskedasticity-DCC-(1,1) through the period of study since July 1, 2019 to June 30, 2020. To assess the unexpected impact of COVID-19, this study pursues the Kuttner’s (2001) methodology. Findings The empirical findings indicate strong important correlation among Bitcoin and Gold if COVID-19 surprises are integrated in variance. This study validates the financialization hypothesis of Bitcoin and Gold. The correlation between Bitcoin and Gold begin to react significantly further in the case of COVID-19 surprises in USA than those in China. Originality/value This paper contributes to the literature on assessing the impact of COVID-19 confirmed cases surprises on the correlation between Bitcoin and Gold. This paper gives for the first time an approach to capture the COVID-19 surprise component. Also, this study helps to improve financial backers and policymakers' comprehension of the digital currencies' market elements, particularly in the hours of amazingly unpleasant and inconspicuous occasions.

A. Melki, Nourhaine Nefzi

No abstract is available for this record.

Pavel Ciaian, d’Artis Kancs, Miroslava Rajčániová

We studied the extent to which bitcoin blockchain security permanently depends on the underlying distribution of cryptocurrency market outcomes using daily blockchain and bitcoin data for 2014–2019 and employing the autoregressive-distributed lag (ARDL) approach. We tested three equilibrium hypotheses: (i) sensitivity of the bitcoin blockchain to mining reward, (ii) security outcomes of the bitcoin blockchain and the proof-of-work cost, and (iii) the speed of adjustment of the bitcoin blockchain security to deviations from the equilibrium path. Our results suggest that bitcoin price and mining rewards were intrinsically linked to bitcoin security outcomes.The bitcoin blockchain security’s dependency on mining costs was geographically differenced – it was more significant for the global mining leader China than for other world regions. Bitcoin blockchain security tended to revert relatively fast to its equilibrium security level after the input or output of price shocks.

Khurram Shehzad, Faik Bilgili, Umer Zaman, Emrah Koçak · 5 authors

No abstract is available for this record.

Mustafa Disli, Ruslan Nagayev, Kinan Salim, Siti Kholifatul Rizkiah · 5 authors

No abstract is available for this record.

Muhammad Abubakr Naeem, Imen Mbarki, Majed Alharthi, Abdelwahed Omri · 5 authors

COVID-19 has morphed from a health crisis to an economic crisis that affected the global economy through several channels. This paper aims to study the impact of COVID-19 on the time-frequency connectedness between Green Bonds and other financial assets. Our sample includes the global stock market, bond market, oil, USD index, and two popular hedging alternatives, namely Gold and Bitcoin, from May 2013 to August 2020. First, we apply the methodologies of Diebold and Yilmaz (International Journal of Forecasting, 2012, 28(1), 57–66) and Baruník and Křehlík (Journal of Financial Econometrics, 2018, 16(2), 271–296). Then, we estimate hedge ratios and hedge effectiveness of green bonds for other financial assets. Green bonds are found to have a great weight in the overall network, particularly strongly connected with the USD index and bond index. While the bi-directional relationship with USD persists during COVID, the connectedness with conventional bonds is also strengthened. Notably, we find a weak relationship between Green bonds and Bitcoin, both in the short and long run. As portfolio implications, Gold and USD have the highest hedge ratio, which is confirmed by the hedging effectiveness. In contrast, oil and stocks exhibit the lowest hedging effectiveness. Our findings imply that financial assets might have a heterogeneous relationship with green bonds. Furthermore, despite its infancy, it seems that the role of green bond during a crisis should not be ignored, as it can be a hedger for some assets, while a contagion amplifier during crisis times.

Rensi Li, Yinglin Wan

Blockchain technology is one of the most critical emerging technologies. Countries are promoting the development of blockchain technology vigorously. Theoretically, blockchain technology improves the trust between enterprises, reduces information asymmetry, and promotes efficiency. It should promote corporate performance, but analyzing the actual data of Chinese listed companies, contrary to expectation, blockchain technology makes corporate performance decline. We found that this is mainly due to the effect of adverse selection through analysis and empirical tests. The enterprises that use blockchain technology are not accompanied by the increase in R&D expenditure, investment expenditure, and patents. The companies’ abnormal stock return and stock turnover rate have increased. The enterprises with worse performance are more likely to use blockchain to the hype. They can gain a short-term stock return. However, in the long run, the market-to-book ratio of government subsidies and the growth rate of corporate income are declining. Furthermore, the financial constraints are not alleviated as adverse selection only plays a role in the short term. Besides, the heterogeneity tests find that from the prospects of internal governance environment, the higher proportion of the largest shareholder, the better earning quality of the company. The enterprises with state-owned property rights have lower motivations of using blockchain to make an adverse selection. The study also found that the external environment prospects of enterprises with a lower degree of marketization and law environment are more likely to use the blockchain.

María de la O González, Francisco Jareño, Frank S. Skinner

No abstract is available for this record.

Samet Gürsoy

Bitcoin, son yüzyılın en meydan okuyan girişim örneklerindendir. Bu doğrultuda Bitcoin’e olan ilgi de hem kripto borsalarda hem de akademik literatürde çokça yer almaktadır. Genelde yapılan çalışmalarda, Bitcoin fiyatı üzerinde etkili olabileceği düşünülen finansal varlık rasyoları dikkate alınmaktadır. Bu çalışmada ise gazete ve medya haberlerinde Para Politikası Belirsizliği (MPU) ile ilgili yer alan haberler dikkate alınarak oluşturulan endeksler kullanılmıştır.Bu çalışmada, Ağustos 2010-Ağustos 2020 dönemlerinde Bitcoin fiyatı ile ABD ve Japonya Para Politikası Belirsizliği (MPU) endeksleri arasında aylık veriler kullanılarak, Hatemi-J (2012) asimetrik nedensellik testi çalıştırılmıştır. Çalışmanın sonunda ABD ve Japonya para politikası belirsizliği ile Bitcoin fiyatları arasında ne tek yönlü ne de çift bir nedensellik ilişkisine rastlanmamıştır. Bu çalışmada yer alan veriler ve değişkenler göz önüne alındığında, ABD ve Japon para politikası belirsizliği ile ilgili haberler ile Bitcoin fiyatları arasında bir ilişki olmadığı sonucuna varılmıştır

Eray Gemi̇ci̇, Müslüm Polat

Purpose This study aims to examine the volatility spillovers between Bitcoin (BTC), Litecoin (LTC) and Ethereum (ETH) as they are related to structural breaks. Design/methodology/approach This study examines the daily period from August 7, 2015 to July 10, 2018 by conducting causality-in-mean and causality-in-variance tests among cryptocurrencies. Findings The findings showed that there was one-way causality-in-mean from BTC to LTC and ETH, but there was no causality-in-mean from LTC and ETH to BTC. On the other hand, considering the structural breaks included in the variance equations, the estimation results showed that there were short-term causality-in-variance from LTC to BTC and long-term causality-in-variance from BTC to LTC. Originality/value This study fills the gap by contributing in two ways. First, to the best of the authors’ knowledge, this is the first study that used the cross-correlation function (CCF) of causality to explore causality-in-variance among cryptocurrencies. Second, this study considers the structural breaks in variance in the return series.

Jiang Nan, Xing Liu, Ming Xu

Abstract Blockchain has been regarded as an emerging global technological phenomenon. This study uses the patent analysis method to compare the development of blockchain technology in China and the USA. An overview of blockchain policies in China and the USA is presented. Our analyses suggest that policies related to the blockchain stimulate the number of blockchain patent applications and create regional innovation in China. The innovation capability of Chinese enterprises has been more affected by these policies than that of the USA, which is reflected in the fact that Chinese enterprises have become key players in China and actively carry out patent layout in the USA. Although the developmental trend of blockchain technology in China and the USA is almost identical, the USA attaches more importance to safety technology, whereas China pays more attention to the application technology based on the differences in policies.

Jianli Zhou, Yunna Wu, Fangtong Liu, Yao Tao · 5 authors

No abstract is available for this record.

Ismail O. Fasanya, Johnson A. Oliyide, Oluwasegun B. Adekoya, Taofeek Agbatogun

No abstract is available for this record.

Shanshan Jiang, Kine Jakobsen, Letizia Jaccheri, Jingyue Li

Blockchain is an emerging technology with potential to address issues related to sustainability. Literature reviews on blockchain and sustain ability exist, but there is a need to consolidate existing results, in particular, in terms of Sustainable Development Goals (SDG). This extended abstract presents an ongoing tertiary study based on existing literature reviews to investigate the relationship between blockchain and sustain ability in terms of SDGs. Results from a pilot analysis of 18 reviews using thematic analysis are presented.

Ahmed Jeribi, Yasmine Snene Manzli, Islem Khefacha

Abstract Using the DCC-GARCH (1.1) model, we investigate the dynamic conditional correlations between Tunisian indices, digital assets, and gold prices for the period ranging from 4 January 2016 to 30 April 2020. Our findings reveal that digital assets (Bitcoin, Ripple, Ethereum, and Dash) and gold can be considered as hedge and diversifier assets before the 2020 global pandemic. Contrarily to Ripple which can be a safe haven asset for the Tunisian investors in early 2020, Monero can be considered as a diversifier asset more than a hedge. Finally, our results can be useful to Tunisian investors when accounting for implementing hedging strategies. JEL classification: C22, C5, G1

Yanfeng Jiang, Wenyu Zheng

No abstract is available for this record.

Ahmet Faruk Aysan, Asad Ul Islam Khan, Humeyra Topuz

The main aim of this article is to examine the inter-relationships among the top cryptocurrencies on the crypto stock market in the presence and absence of the COVID-19 pandemic. The nine chosen cryptocurrencies are Bitcoin, Ethereum, Ripple, Litecoin, Eos, BitcoinCash, Binance, Stellar, and Tron and their daily closing price data are captured from coinmarketcap over the period from 13 September 2017 to 21 September 2020. All of the cryptocurrencies are integrated of order 1 i.e., I(1). There is strong evidence of a long-run relationship between Bitcoin and altcoins irrespective of whether it is pre-pandemic or pandemic period. It has also been found that these cryptocurrencies’ prices and their inter-relationship are resilient to the pandemic. It is recommended that when the investors create investment plans and strategies they may highly consider Bitcoin and altcoins jointly as they give sustainability and resilience in the long run against the geopolitical risks and even in the tough time of the COVID-19 pandemic.

Tiejun Chen, Chi Keung Marco Lau, Sadaf Cheema, Chun Kwong Koo

This paper analyses the effects of the Chinese Economic Policy Uncertainty (CEPU) index on the daily returns of Bitcoin for the period from December 31, 2019 to May 20, 2020. Utilizing the Ordinary Least Squares (OLS) and the Generalized Quantile Regression (GQR) estimation techniques, the paper illustrates that the current CEPU has a positive impact on the returns of Bitcoin. However, the positive impact is statistically significant only at the higher quantiles of the current CEPU. It is concluded that Bitcoin can be used in hedging against policy uncertainties in China since significant rises in uncertainty leads to a higher return in Bitcoin. JEL Codes: G32; G15; C22

Chu-Chi Kuo, Joseph Z. Shyu

Blockchain technology can achieve decentralization, multi-party verification, anti-tampering, anonymity, traceability of transactions, and the application of distributed ledger. Countries around the world continue to seek the blockchain business models, technologies and applications, and have different visions and policies for the development of blockchain. This study conducts a comparative policy framework of theoretical analysis of the blockchain technology between the USA and China. Using the innovative policy tools proposed by Rothwell and Zegveld, the above mentioned governments are analyzed from the viewpoint of twelve policy tools. The results show that the USA and China all prefer to use “Environmental-side” policy. The USA has paid more attention to “Legal and regulatory”, “Public services” and “Procurement”. China has the highest proportion of policies in “Political tools”, followed by “Legal & regulatory”, while “Scientific and technical”, “Education” and “Overseas agent” come in third . The blockchain technology has developed vigorously among industries and its applications have gradually diversified. The results are provided to various stakeholders as a reference for policy planning.

Muhammad Umar, Chi‐Wei Su, Syed Kumail Abbas Rizvi, Xuefeng Shao

No abstract is available for this record.

Barbara Będowska-Sójka, Agata Kliber

No abstract is available for this record.

Shaista Wasiuzzaman, Hajah Siti Wardah Haji Abdul Rahman

No abstract is available for this record.