Rui Dias

Polytechnic Institute of Setúbal · Accounting & Finance

This paper aims to analyze whether the financial crises of the past 20 years have reduced efficiency, in its weak form, in 19 stock markets belonging to the 20 most developed economies (G-20). The sample period comprises the period from 2 January 2000 to 5 February 2021 with the respective financial crises, namely, Dot-com, Argentina, Subprime, Sov...

The energy sector has been the main economic hub in everyone’s lives and in worldgeopolitics. Consequently, oil, gas, electricity and energy from renewable sources (wind and solar)are traded on the stock market, and all interconnected around the world. On the other hand, aglobal health crisis, such as COVID-19, can produce a great economic catastro...

In light of the events of 2020 and 2022, this study aims to examine the co-movements between the capital markets of the Netherlands (AEX), France (CAC 40), Germany (DAX 30), the United Kingdom (FTSE 100), Italy (FTSE MIB), Spain (IBEX 35), Russia (IMOEX), and spot prices of crude oil (WTI), silver (XAG), gold (XAU), and platinum (XPT) from January...

This paper intends to analyze efficiency, in its weak form, in the stock markets of Austria (ATX), Poland (WIG), the Czech Republic (PX Prague), Hungary (BUX), Croatia (CROBEX), Serbia (BELEX 15), Romania (BET), and Slovenia (SBI TOP), from February 16, 2018, to February 15, 2023. To achieve the research aim, we intend to answer the following resea...

This article aims to analyse risk transmission among the financial markets of China and ASEAN-5 in the context of the 2015 Chinese stock market crash. For this purpose, the authors test if (1) the volatility resulting from the 2015 stock market crash has positively influenced risk transmission among ASEAN-5 and China markets and (2) increased risk...

The purpose of this paper is to estimate whether portfolio diversification is feasible in the capital markets of the Netherlands (AEX), France (CAC 40), Germany (DAX 30), Canada (FTSE 100), Italy (FTSE MIB), Spain (IBEX 35), Russia (IMOEX), and the commodities oil (WTI), silver (XAG), gold (XAU), and platinum (XPT) from January 1st, 2018, to Decemb...

In this study we analyse efficiency, in its weak form, in the exchange rates AUD/USD (Australian dollar/US dollar), BRL/USD (Brazilian real/US dollar), CHF/USD (Swiss franc/US dollar), EUR/USD (Euro/US dollar), GBP/USD (British pound/US dollar), JYP/USD (Japanese yen/US dollar), RUB/USD (Russian rouble/US dollar) and SGD/USD (Singapore dollar/US do...

When compared to traditional financial markets, cryptocurren-cies were seen as assets with minimal correlations. However, because this continually expanding financial market is marked by substantial volatility and strong price movements over a short period, developing an accurate and reliable forecasting model is deemed crucial for portfolio manage...

Russia invaded Ukraine on February 24 th , 2022, marking a steep escalation of the Russo-Ukrainian War, which began in 2014 after the Ukrainian Dignity Revolution. The invasion caused Europe's largest refugee crisis since World War II, with more than 5.5 million Ukrainians leaving the country and a quarter of the population displaced. At the outbre...

On February 24 th , 2022, Russia launched a full-scale military invasion against Ukraine, marking a sharp escalation to a conflict that began in 2014. Several analysts have called the invasion the largest military invasion in Europe since World War II. Considering these events this paper aims to test the efficient market hypothesis, in its weak for...

Following the Revolution of Dignity in Ukraine in 2014, Russia an­nexed Crimea, while separatist forces supported by the Russian government seized part of the Donbas region in south-eastern Ukraine. Since the begin­ning of 2021, a build-up of Russian military presence has occurred along the Russia-Ukraine border. The United States and other countri...

This chapter aims to test the financial integration and movements in the capital markets. The results suggest that long-term relationships between capital markets and oil markets do not help explain short-term moves. The authors consider the results achieved to be of interest to investors seeking opportunities in these financial markets, and also t...

This chapter aims to analyze financial integration and the presence of long memories in nine capital markets in the period from June 5, 2017 to June 3, 2022. To provide robustness to the research we divide the sample into two sub-periods: tranquil and crisis (global pandemic of 2020 and the Russian invasion of Ukraine in 2022). To conduct this anal...

This chapter aims to test the efficient market hypothesis, in its weak form, in the capital markets of Germany (DAX), USA (Dow Jones), France (CAC 40), UK (FTSE 100), Italy (FTSE MIB), Russia (MOEX), Japan (NIKKEI 225), Canada (S&P TSX), China (Shanghai and Shenzhen), as well as the exchange rates Rouble/Canadian, Rouble/Euro, Rouble/Swiss, Rouble/...

The purpose of this study is to examine the synchronism between the US capital markets (DJ, S&P 500), the United Kingdom (FTSE 100), Canada (S&P/TSX), Germany (DAX 30), France (CAC 40), Japan (Nikkei 225), Italy (Italy Ds Market and major cryptocurrencies such as Bitcoin (BTC), Litecoin (LTC), Ethereum (ETH), and the Crypto 10 index, from February...

This paper aims to test efficiency, in its weak form, in the capital markets of the Philippines (PSEi), South Korea (KOSPI), Indonesia (JKSE), Thailand (SET), Malaysia (KLCI), China (SSEC) and Hong Kong (HSI) over the period from January 2, 2017, to February 17, 2022. The return series shows signs of deviation from the normality hypothesis, given t...

High turnover in the pharmaceutical industry, the location of placebos in urban spaces, and the high rate of corruption of products in this industry are the distinguishing features of the drug supply chain. us, to survive and maintain competitive advantages in the current business environment, managers are active in this background to implement the...

This study aims to analyse the entrepreneurial intentions of students comparing Latvia and other Central and Eastern European countries. The investigation examines the impact of factors of micro and macro level as well as entrepreneurial education. The paper contains both qualitative and quantitative analysis including inferential and descriptive s...

In response to the COVID-19 pandemic, single-use disposable masks saw a dramatic rise in production. Facial masks that are not properly disposed of will expose the environment to a form of non-biodegradable plastic waste that will take hundreds of years to degrade. Therefore, recycling such waste in an eco-friendly manner is imperative. Fibered or...

In response to the COVID-19 pandemic, single-use disposable masks saw a dramatic rise in production. Facial masks that are not properly disposed of will expose the environment to a form of non-biodegradable plastic waste that will take hundreds of years to degrade. Therefore, recycling such waste in an eco-friendly manner is imperative. Fibered or...

The objective of this article is to analyze the co-movements in the G7 stock markets, such as DJ results show an increase in movements during the global pandemic period. It is then possible to conclude the existence of evidence regarding synchronization and high co-movements, the results put at risk the implementation of efficient portfolio diversi...

Breast cancer is one of the leading causes of death and is the most routine form of cancer in women in the world. Carbohydrate antigen 15–3 (CA15–3) tumor marker is a serum-based product of the MUC1 gene and different studies have determined the over-regulation of this tumor marker in breast cancer. Moreover, CA15-3 is overexpressed in a number of...

Este artigo tem como objetivo analisar se o mercado do ouro representa um porto seguro quando os principais mercados financeiros sofrem quebras significativas. Para tal, e efetuada uma análise sobre a integração e os comovimentos nos mercados de ações de Franca (CAC 40), Alemanha (DAX 30), Estados Unidos (Dow Jones), Reino Unido (FTSE 100), Itália...

Em épocas de alterações profundas e rápidas é imperioso que as organizações consigam atender ao conjunto de desafios com que se deparam. Temas Emergentes em Ciências Empresariais – Vol. 1 – Novas abordagens nas áreas científicas da Contabilidade, Finanças, Sistemas de Informação, Metodologias e Práticas Pedagógicas é um contributo de um significati...

Em épocas de alterações profundas e rápidas é imperioso que as organizações consigam atender ao conjunto de desafios com que se deparam. Temas Emergentes em Ciências Empresariais – Novas abordagens nas áreas científicas dos Recursos Humanos, Marketing e Turismo, Empreendedorismo e Inovação é um contributo de um significativo número de especialistas...

The International Accounting Standards Board (IASB) conductsvery demanding and complex work to setting accounting standards. Theoutputs produced by this board and their acts have been scrutinized overthe years, by practitioners and academics. This study aims to contribute tothe knowledge on the role of IASB by unveiling the research trends address-...

Financial theory encompasses several financial domains, as management , budgeting, or investing. Over time, different topics have been addressed in financial policies in different countries, which were followed by academics. During the COVID-19 pandemic, specific crisis-related issues have been addressed to contribute to the financial dimensions of...

Management accounting theory aims to contribute to managers using accounting reports for supporting their management decisions. During the COVID-19 pandemic, such insights would be essential for supporting decisions during lockdowns and other policy makers' rules imposed by this health crisis. To unveil how academic literature addresses management...

The aim of this study is to test and compare the efficient market hypothesis, in its weak form, on the stock markets of Botswana, Egypt, Kenya, Morocco, Nigeria, South Africa, Japan, the UK and the USA from 2 September 2019 to 2 September 2020. This study is based on the following research question: has the global pandemic (COVID-19) reduced the ef...

The online crowdfunding platforms become the main way of nonprofits to raise funds during the COVID-19 pandemic, due to lockdown and social and physical distancing policies. One year after the beginning of the current global health pandemic, this study applies quantitative methods for providing results on the evolution of the amounts donated for no...

This paper aims to test efficiency, in its weak form, in the capital markets of the Netherlands (AEX), Belgium (BEL 20), France (CAC 40), Ireland (ISEQ 20), Norway (OSEBX), Portugal (PSI 20), in the period from April 4, 2019 to April 1, 2021. The sample was partitioned into two sub-periods, the first and second wave of the global pandemic. To carry...

This paper aims to examine whether the oil price war between Saudi Arabia and Russia has increased integration between the Crude Oil WTI Spot oil index and the G7 stock markets,. The results show that in the period before the oil price war, the G7 stock markets and the WTI index had 29 integrations (out of 56 possible). The WTI index is integrated...

Given the importance of the financial markets in the global context, data analysis and new statistical approach are always welcome, especially if we are referring to G-20 group (the world's richest countries). As we know, the pandemic outbreak of COVID-19 has affected the global economy, and its impact seems to be inevitable (as it was in 2020). Fr...

This study aims to analyze the impact of the 2020 global pandemic on the bankingsectors of the countries of France, Germany, Greece, Ireland, Italy, Portugal, and Spain for theperiod from January 1, 2018, to August 10, 2020, with the sample being split into two subperiods: first subperiod from January 2018 to August 2019 (Pre-Covid); and the second...

The purpose of this study is to examine the synchronism between the US capital markets (DJ, S&P 500), the United Kingdom (FTSE 100), Canada (S&P/TSX), Germany (DAX 30), France (CAC 40), Japan (Nikkei 225), Italy (Italy Ds Market and major cryptocurrencies such as Bitcoin (BTC), Litecoin (LTC), Ethereum (ETH), and the Crypto 10 index, from February...

This study seeks to investigate the entrepreneurial perceptions among the students regarding their professional careers analyzing macro, micro and entrepreneurial education factors in Latvia, including the analysis of gender differences. The research is based on the analysis of data collected through a survey. The paper uses statistical analysis in...

This paper aims to analyze the efficiency, in its weak form, in the markets of commodities, Platinum (London Platinum Free Market $/Troy oz), GOLD (Gold Bullion LBM $/t oz DELAY), SILVER (Silver – Zurich SW. francs/kg) and the stock markets of KOREA, CHINA, JAPAN, PHILIPPINES, IN¬DONESIA, from January 1, 2019 to October 20, 2020. To perform this an...

The 2020 Russia-Saudi Oil Price War was an economic war triggered in March 2020 by Saudi Arabia in response to Russia’s refusal to reduce oil production to keep oil prices at a moderate level. In view of these events, this study aims to analyze oil shocks (WTI) in the eastern European stock markets, namely the stock indices of Hungary (BUX), Croati...

This paper aims to analyze the predictability of the stocks of Apple, Microsoft Amazon.com, Tesla, Facebook, Samsung, Electronics, Johnson & Johnson, Walmart, in the period from October 1, 2019 to January 11, 2021. To carry out such an analysis, it is intended to answer two research questions, namely: (i) is there predictability in the stock prices...

Through accountability, organizations provide key information for stakeholders enabling the latter to make an informed assessment of organizational performance. To achieve transparency, organizations must make information accessible and timely. During the crisis, as in the COVID-19 pandemic period, accurate accountability and transparency practices...

The 2020 Russia-Saudi Oil Price War was an economic war triggered in March 2020 by Saudi Arabia in response to Russia’s refusal to reduce oil production to keep oil prices at a moderate level. This economic conflict resulted in a sharp drop in the price of oil in 2020, as well as crashes in international markets. In the light of these events, our a...

This essay aims to analyze the efficiency, in its weak form, in the Exchange Markets IDR/MYR (Indonesia-Malaysia), IDR/PHP (Indonesia-Philippines), IDR/SGD (Indonesia-Singapore), IDR/THB (Indonesia-Thailand), IDR/GBP (Indonesia-UK), IDR/US (Indonesia-USA), IDR/EUR (Indonesia-Euro Zone/Europe). The sample comprises the period from September 3, 2018,...

The International Accounting Standards Board (IASB) conducts very demanding and complex work to setting accounting standards. The outputs produced by this board and their acts have been scrutinized over the years, by practitioners and academics. This study aims to contribute to the knowledge on the role of IASB by unveiling the research trends addr...

Interpretation for the adoption of the International Financial Re­porting Standards (IFRS) became to be challenging for organizations. Over time, these standards are changed to accommodate the improvements iden­tified in accounting rules. COVID-19 pandemic impacted accounting report­ing considering that contingencies and risks arising from this hea...

This paper aims to test the efficient market hypothesis, in its weak form, in the stock markets of BOTSWANA, EGYPT, KENYA, MOROCCO, NIGERIA and SOUTH AFRICA, in the period from September 2, 2019 to September 2, 2020. In order to achieve this analysis, we intend to find out if: the global pandemic (Covid-19) has decreased the efficiency, in its weak...