Rui Teixeira Dias

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• Postdoctoral
• Professor (Associate) at Instituto Superior de Gestão

Artificial intelligence (AI) is poised to significantly transform the fields of finance, auditing, and investment over the coming decade. In financial services, AI is anticipated to enhance decision-making processes, improve risk management practices, and facilitate the delivery of personalized financial solutions. The auditing profession will be r...

India's internet and mobile phone usage has skyrocketed over the last decade. As the number of people using the internet and mobile devices grows, online payment methods for the general public are becoming more streamlined thanks to government initiatives like Digital India. As a result, the number of digital payment implementations is rapidly incr...

The study analyses the influence of the international oil price, focusing on the CBOE Crude Oil Volatility Index and Brent crude oil, on the main exchange rates: EUR/GBP, EUR/USD, GBP/USD, USD/CHF and USD/JPY. The analysis covers the period from 3 January 2022 to 8 December 2024 to examine the relationship between fluctuations in the oil market and...

The main objective of this research is to evaluate the efficiency, in its weak. The results show that Bitcoin (BTC), Metaverse, Litecoin (LTC) and Cardano (ADA) have persistent behaviour with a long memory, which favours long-term strategies. Long memories indicate that markets are less efficient, where trends tend to continue, making long-term str...

Complex investment decisions require thorough study. Modern portfolio theory provides some broad guidelines on diversification within this framework, focusing on financial instrument categories. A diverse portfolio and favorable economic conditions are the main factors affecting investor returns. The research used the RIETS portfolio and genetic al...

The paper explores how corporate governance practices influence non-financial performance, particularly sustainability. Strong governance ensures that ESG principles are integrated into business operations, promoting long-term sustainability. The study examines the effectiveness of AI-assisted behavioral interventions in advancing sustainable pract...

In this paper, from the bi-variate cross-correlation coefficient of [Formula: see text] we propose a generalization for the multivariate cross-correlation coefficient ([Formula: see text]) used in analysis with non-stationary time series. We applied our generalization [Formula: see text] in simulated time series with short memory (ARMA process) and...

This article investigates the link between corporate social responsibility (CSR) perceptions of employees and employee burnout, from a sustainable development point of view, in the healthcare system of China. It fills the void in conventional literature by analyzing the indirect effect of CSR on the health and well-being of health workers aligning...

Due to climate change, investors are increasingly interested in clean energy stocks attracting many investors due to clean energy prospects. This paper analyses investor overreactions to long-term prices in various clean energy stock indices, such as Clean Energy Fuels (CLNE), Global Clean Energy (GCEI), as well as the Dow Jones Industrials (DJI) s...

This study analyses the movement patterns between clean energy indices and oil benchmarks such as Brent and WTI from 7 January 2022 to 8 November 2024, intending to verify whether clean energy indices can serve as effective risk diversification instruments. The research focuses on the Nasdaq Clean Edge Green Energy (CELS), S&P Global Clean Energy (...

This study aims to analyse whether precious metals can be hedged assets concerning green energy indices from 8 January 2019 to 6 December 2024. About precious metals, the futures market was analysed: copper (HGH5) and silver (SIH5), the gold spot market (XAU) was also included to provide robustness, and the green indices are S&P Global Clean Energy...

The main purpose of this study is to understand the movements between Fintech and AI stock indices, namely the Global Fintech, Artificial Intelligence & BigData Index (IAIQ), Blockchain Index (ILEGR), Disruptive Technology Index (IDTEC), in order to understand whether they behave as diversifying assets for India’s main stock index (Nifty 50). The r...

Given the events in 2022, characterised by Russia’s invasion of Ukraine, the financial markets were affected by a spiral of mistrust and overreactions in various geographies. The primary objective of this study is to evaluate the serial autocorrelation of stock prices on the capital mar­kets of Slovakia (SAX 16), Hungary (BUX), Russia (MOEX), the C...

This study's purpose is to assess the safe haven characteristics of the precious metals Gold, Handy & Harman, Silver and Handy & Harman concerning the clean energy indices S&P Global Clean Energy and WilderHill Clean Energy, testing this evidence through the contagion phenomenon. The results indicate that Gold and Silver act as safe-haven assets wi...

The primary purpose of this study is to compare the levels of efficiency between the Islamic cryptocurrency (HelloGold), the ecological cryp-tocurrencies Cardano (ADA) and Stellar (XLM) and the traditional digital currencies Bitcoin (BTC) and Ethereum (ETH) over the period from 24 Feb-ruary 2022 to 28 January 2024. Analysing the DFA exponents revea...

This research aims to determine the impact of corporate governance, firm complexity, foreign ownership, and ownership concentration towards auditor choice for Sharia commercial banks in Indonesia in 2016-2023. Firm size is also accounted for as a control variable. This research was conducted using a quantitative approach using the logit logistic re...

The chapter "The Future of Indigenous Inclusivity: Unlocking Finance for Economic Development" emphasizes the need to integrate Indigenous communities into economic development. It addresses historical and current obstacles faced by Indigenous peoples, including structural hurdles, socioeconomic gaps, and geographic limitations. The chapter offers...

The rapid expansion of digital currencies, such as cryptocurrencies, has generated increased interest in understanding investor behaviour and the regulatory challenges that emerge in this new financial market. The study explores factors influencing investor behaviour, such as the interaction between emotions, market sentiment and information asymme...

The crash in the cryptocurrency market on 5 September 2018 caused a sharp drop in the prices of 95 of the top 100 digital currencies. To understand the causes of this event, we used intraday (hourly) data for several cryptocurrencies, such as BITCOIN, ETHEREUM, RIPPLE, BITCOIN-CASH, EOS, NEO, NEM, OMG, TEZOS and LISK, which were particularly affect...

Due to the acceleration of the technological revolution, there is a pressing need to analyse the complex interactions between fintechs, digital currencies, and exchange rates, which are driven by the search for economic and financial sustainability. This imperative is intensified by the growing volatility of oil prices, which exacerbates systemic r...

The study investigates the role of cryptocurrencies, specifically five of the most relevant and four global stock markets, in terms of hedging, safe harbour and portfolio diversification functions. Using the ADCC-GARCH methodologies (which analyses the dynamics of volatility and correlation between assets) and the wavelet coherence technique (to st...

Objective: This article aims to investigate the state of the art regarding the scientific production of Econophysics as a field of study. The aim is to map the annual production of articles, types of documents, most relevant authors, most productive countries, institutions, journals, scientific collaboration networks, and associated themes and tren...

This chapter explores the process of relationships between business incubation and growth and development of entrepreneurship. The researcher has specifically focused on the provision of incubators and their dynamic support along with the financial support provided by the incubation centres for the growth of entrepreneurship. The researcher has foc...

In theory, geopolitical risk and political uncertainty can directly affect energy markets. Fluctuations lead to the cost of clean energy sources as they compete with traditional energy. The purpose of this study is to analyse financial integration and test the diversifying asset hypothesis between clean energy indices, specifically the Clean Energy...

The Big Data Age defines the present era, and the globalisation of business makes it pressing to derive valuable insights from data so that organisations can make sustained decisions. There is no consensus in the literature on how organisations should guide the vast volume of data in value creation or galvanise performance gains. The study aims to...

India has emerged as one of the world's most appealing locations for renewable energy development. It has set lofty renewable energy goals to reach 450 gigawatts (GW) capacity by 2030. These aims indicate India's determination to move to greener and more sustainable energy sources. India has been investing in R&D to promote technological innovation...

Over the past few years, the crypto industry has encountered various obstacles, including regulatory obstacles, unsuccessful exchanges, and projects that have collapsed. These challenges have paved the way for groundbreaking solutions that are revolutionising the realm of decentralised finance (DeFi). An emerging solution with immense potential is...

We study the air temperature with 10 years of hourly measured in 12 automatic weather stations, located in the State of Bahia (Brazil), considering mainly its auto- and cross-correlation. We found that, in general, there is a positive linear trend, indicating warming in this variable for all stations. Also, we observe that the probability distribut...

The dynamic nature of today's workplace presents special opportunities as well as challenges for HRM. Natural Language Processing, a branch of artificial intelligence, has the potential to completely transform human resource management (HRM) by means of the use of data-driven decision-making, bias mitigation, employee experience personalization, as...

The present study aimed to explore the linkages between Allen and Meyer's (1991) three-component model of organizational commitment and organizational citizenship behaviour as defined by Organ (1988). This paper was to see how work happiness affects Professional institutions employees ‘working conditions. Employees working at Professional instituti...

Objective: The main objective of this study was to analyse the role of internal marketing in managing health services in the Clinicas de Santa Madalena (CSM) group. Theoretical Framework: Internal marketing is a management strategy aimed at motivating and involving employees, aiming to improve the performance and quality of services, which positive...

This study aimed to understand how big data (BD) contributes to value creation in organisations and provides relevant, integrated, and timely information for the performance measurement/assessment model that supports top-management decision-making. The empirical study employs a qualitative methodology comprising five cases using the multiple-case s...

Objective: This paper aims to characterise the daily fluctuations of the wind speed and solar radiation time series of some cities in the State of Bahia, Brazil, from January 2009 to December 2018, using the sliding window approach. Theoretical Framework: Due to its complexity and importance for life on planet Earth, climate change and its socio-en...

The pursuit of financing instruments aligned with the Sustainable Development Goals (SDGs) is crucial for fostering sustainability in diverse economic sectors. However, a significant gap exists in understanding the performance of green assets, posing challenges for investors and pol-icymakers. This study addresses this gap by examining the relation...

This study examined the short-term dynamics between Bitcoin, Ethereum, Litecoin, Clean Energy Fuels, and WilderHill Clean Energy over the period from January 1, 2020, to May 30, 2023. Bitcoin saw substantial price fluctuations over 10 days, highlighting its inherent volatility and rapid shifts in value. In contrast, Ethereum and Litecoin showed mor...

The drive for sustainability and carbon emissions reduction is fueling the demand for clean energy solutions, with energy metals playing a crucial role in this transition. The environmental and ethical implications of mining and supplying these materials impact market dynamics, influenced by environmental regulations and consumer preferences for su...

The study examined the "role of perceived organisational support in predicting organisational commitment and organisational citizenship behaviour in professional organisations". The primary data was acquired through a questionnaire from 200 respondents (employees from the finance and technology sectors) via a stratified random sampling technique. E...

Resumo: Este artigo descreve, no âmbito da pesquisa e extensão universitária, as ações desenvolvidas na associação rural de moradores e agricultores do Cruzeiro, Tábua, Timbó e Adjacências situada na região de Conceição da Feira, Bahia-Brasil. A proposta de trabalho foi discutir economia, agricultura familiar, formação e capacitação nesta associaçã...

Decentralised Finance (DeFi) provides a new way to perform complex financial transactions by exploiting blockchain's ability to maintain a decentralised ledger of transactions without being constrained by centralised systems or human intermediaries. DeFi provides alternative financial instruments that might lessen portfolio risk, especially given t...

Exchange-traded funds (ETFs) are the most popular products in the financial sector today. There is extensive literature on the multifractal analysis of some stock markets, but not about the multifractal behaviour of the ETF market. This study examines the efficiency of stock index ETFs worldwide from an Efficient Market Hypothesis (EMH) perspective...

Objective: This article aims to jointly analyse the time series of the rates of stolen vehicles and stolen vehicles daily in Salvador, Bahia, Brazil, using DFA and DCCA methods, both with the sliding windows approach. Theoretical Framework: Salvador, the capital of the state of Bahia and the geographic space of the research, has the second largest...

This paper aims to assess the comovements between clean energy indices, namely the Clean Energy Fuels (CLNE), Nasdaq Clean Edge Green Energy (CELS), S&P Global Clean Energy (SPGTCLEN), TISDALE Clean Energy (TCEC.CN), Wilderhill (ECO), West Texas Intermediate (WTI) stock indices, over the period from 1 January 2018 to 23 November 2023. We used 10-da...

Objective: This article aims to jointly analyse the time series of the rates of stolen vehicles and stolen vehicles daily in Salvador, Bahia, Brazil, using DFA and DCCA methods, both with the sliding windows approach. Theoretical Framework: Salvador, the capital of the state of Bahia and the geographic space of the research, has the second largest...

Objective: The objective of this study is to determine the rate of opportunity cost of capital and analyse project financing, within the scope of concepts and techniques in investment analysis and evaluation. Theoretical Framework: The concept of "opportunity cost of capital" is presented, as well as the methodologies for determining the rate of co...

This study aimed to assess the impact of Self Help Groups and their specific interventions, such as vocational training programmes and the use of loans in productive means, on the empowerment of Dalit women of Haryana. A selected control group from OBCs was studied, and it was shown how the livelihood interventions of Self Help Groups bridged the g...

This study tests whether the 2022 event has increased investor overreactions in the capital markets of eight Central and Eastern European countries (Romania, Bulgaria, Slovakia, Hungary, Croatia, Russia, the Czech Republic, and Slovenia). This chapter contributes to the existing literature on overreaction behavior in Central and Eastern European ca...

The rise of hybrid work models, blending remote and onsite work arrangements, has become increasingly prevalent in today's workforce, especially in the IT industry. The research aims to determine the effects of a hybrid-work model on the job satisfaction of tech professionals, focusing on key factors including onsite work, remote work, flexibility,...

Given the global pandemic in 2020 and the Russian invasion of Ukraine in 2022, there is renewed interest in understanding the integration between the Dow Jones (United States), Amman SE General (Jordan), BLSI (Lebanon), EGX 30 (Egypt), ISRAEL TA 125 (Israel), MASI (Morocco), MOEX (Russia) stock indices and the precious metals Gold Bullion LBM, Silv...

Objective: This analysis aimed to identify the spending patterns of consumers in various types of banks. Theoretical Framework: India has a strong banking system which encourages competition between different categories of banks. Technology improvements have brought about modifications to the payment mechanism. Therefore, the usage of non-cash paym...

Objective: This paper's purpose is to comprehensively analyse and review the International Conventions that serve as the basis for the signatory countries to frame their legal framework based on the principal foundations of the standardised conventions in their domestic laws and establish policy developments in their jurisdictions. Theoretical Fram...

Objective: This paper aims to identify the various factors that disrupted the mental wellbeing of homemakers during the pandemic. The articles were searched through Google Scholar and Web of Science Scholar. Theoretical Framework: COVID-19 has drastically changed the lives of human beings, whether financially, physically, or mentally, but it has c...

This study aimed to assess risk diversification in the capital markets of nine Asian countries, including Hong Kong, Indonesia, Malaysia, South Ko-rea, Japan, the Philippines, Thailand, China, and Taiwan. The research posed two main questions: (i) Did events in 2020 and 2022 create inefficiencies in these markets? (ii) If so, did autocorrelation of...

This article analyzes energy metals, specifically aluminum (MAL3), nickel futures (NICKELc1), and copper futures (HGU3), concerning 3 clean energy indexes: the S&P Global Clean Energy Index (SPGTCLEN), the Nasdaq Clean Edge Green Energy (CEXX), and the WilderHill Clean Energy Index (ECO). It focuses on a significant period during which investments...

Promoting clean energy sources necessitates global cooperation through cross-border collaboration, knowledge sharing, and resource allocation. A global imperative exists to transition towards a cleaner, sustainable energy mix to combat climate change and maintain environmental equilibrium. This study assesses the influence of fossil energy prices (...

Objective: This article aims to analyze the connectivity of the fat ox and corn price indices in Bahia Theoretical Framework: The State of Bahia is economically and internationally important in terms of agricultural production in Brazil. Therefore, studying economic indicators and understanding their dynamics is necessary in increasingly competitiv...

Objective: This study uses a bibliometric analysis of articles on sustainability dimensions in various ways to illustrate the current trends in business sustainability literature. Theoretical Framework: The concept of business sustainability has undergone significant development over time. Since the inception of the modern environmental movement an...

Objective: The main objective of this research project is to analyse the role of the banking sector in Angola's economic growth over 25 years, i.e. from 1995 to 2019. In this sense, the aim was to verify whether the banking sector, in the period 1995-2019, contributed significantly to the growth of the country's economy and whether the evolution of...

Objective: The objective of this study is to provide a reflection on concepts and techniques used in investment analysis and evaluation with the aim of contributing to their clarification, as well as their practical application. Theoretical Framework: The article begins with a brief review of the literature on the concept of cash flow, continuing w...

Background: Integrated Reporting (IR) is an innovative and effective reporting model combining financial and non-financial information into a single report. Purpose: This paper reviews the literature concerning Integrated Reporting related to voluntary disclosure. The study analyses the theoretical foundations of Integrated reporting. It discusses...

Background: The global economy faced increased instability due to the simultaneous occurrence of two major events, the global pandemic in 2020 and the Russian-Ukrainian conflict in 2022, which impacted the financial markets. Purpose: This paper aimed to evaluate the comovements between the USA (S&P 500), Germany (DAX 30), France (CAC40), Japan (Nik...

Background: In recent years, investors' interest in cryptocurrencies has increased due to their notable price volatility and rapid price increases. These investors view cryptocurrencies as suitable financial assets for portfolio rebalancing strategies. Purpose: The main objective of this study is to examine the multifractality of the cryptocurrenci...

Background: Green investments offer a promising market-based approach to tackling global climate change but are susceptible to risk transmission from multiple assets. Purpose: To examine the multifractality between precious metals (Gold, Silver, Platinum) and green stock indices, such as Clean Energy Fuels, Nasdaq Clean Edge Green Energy, S&P Globa...

This study aimed to assess whether renewable energy cryptocurrencies such as Cardano (ADA), Ripple (XRP), IOTA (MIOTA), and Stellar (XLM) can be considered hedging assets and safe havens for cryptocurrencies classified as “dirty,” such as Bitcoin Cash (BCH), Bitcoin (BTC) Litcoin (LTC), Ethereum (ETH), Ethereum Classic (ETC) and the clean energy st...

Background: Although clean energy stocks have become a popular new asset class for market players, relatively little research has been done on risk management strategies for investors in clean energy stock markets. Gold and Silver are examples of precious metals typically considered suitable investments to hedge against uncertainty. Therefore, thei...

The present research focuses on the phenomenon of cryptocurrency market overreactions, especially examining the behavior of Bitcoin, DASH, EOS, Ethereum, Lisk, Litecoin, Monero, NEO, Quantum, Ripple, Stellar, and Zcash from January 2, 2018, to March 1, 2023. The findings show that there are both positive and negative autocorrelations, which might r...

The heightened attention towards clean energy markets has been spurred by COVID-19 and geopolitical concerns in 2022. This study investigates the persistence of the Nasdaq Clean Edge Green Energy, Wilder-Hill Clean Energy, S&P Global Clean Energy, iShares Global Clear Energy ETF, and Clean Energy Fuels stock indexes for the period from May 3, 2018,...

This paper analyses whether clean energy stock indexes, namely WilderHill Clean Energy, Clean Energy Fuels, and Nasdaq Clean Edge Green Energy indexes, can be considered coverage assets for the dirty energy stock indexes such as the Brent Crude Spot and Euro Stoxx Oil & Gas indexes during the events that occurred in 2020 and 2022. The results sugge...

Rural tourism is a part of tourism sector has been seeing fast growth. Today, in many rural areas, attention is influenced towards the economic viability of rural sector. Today, the scenario changed on the aspect of attraction and development of infrastructure facilities with the already existing cultural-heritage places, monuments, religious centr...

Background: Islamic cryptocurrencies are different from conventional ones in that they are backed by physical assets and are based on religious principles. After the COVID-19 pandemic, cryptocurrencies showed different behavior. However, there are not many studies on the efficiency, in its weak form, of these three typical families of cryptocurrenc...

The recent worldwide pandemic of 2020 and Russia's invasion of Ukraine in 2022 have sparked interest in understanding the links between clean and dirty energy markets. This research investigates the co-movements of clean energy and dirty energy stock indexes before and during the 2020 and 2022 events. The study focuses on the Brent Crude Spot, Euro...

In the ever-evolving landscape of finance, the amalgamation of Artificial Intelligence (AI) and Decentralized Finance (DeFi) is proving to be a seismic shift, reshaping the traditional paradigms of the financial industry. As financial ecosystems increasingly embrace the transformative power of technology, "AI-Driven DeFi: Transforming Finance in th...