Are range based models good enough? Evidence from seven stock markets

We study the performance of range-based models over varying market conditions and compare their performance against a set of alternative risk measurement models, including the more widely used techniques in practice for measuring the Value-at-Risk (VaR) of seven financial market indices. In particular, we focus on model accuracy in estimated VaRs over quiet and volatile moments utilizing loss functions and likelihood ratio tests for coverage probability. The empirical estimates based on these two criteria find that the range based-model of Yang and Zhang (2000) shows some success in estimated VaR risk measure, especially during quiet periods, than is the case for the other range based models considered. Also, we find that the EWMA and RiskMetrics models have an inconsistent marginal edge over the widely used GARCH and historical simulation specifications and that there is validity in the use of the EWMA and RiskMetrics models over range-based approaches as both capture and thus provide more accurate estimated VaR risk measure of market risk

Impact of the Commercial Law on E-Commerce Practices and Business Sustainability in Nigeria

With the advent of global market interdependence and interaction, coupled with the consistent spread of the internet facilities across geographical boundaries, businesses engage in e-commerce practices either to augment existing on-ground businesses or as independent outfits. This study focused on the law on e-commerce practice and business sustainability in Nigeria. The study applied a conceptual review focusing on the trends of development of ecommerce practice and the supportive effects of the legal system in facilitating business sustainability in Nigeria. The study relied on extant literature sourced from various outlets, relevant to the topic of this study. The key findings highlighted and discussed factors for improved e-commerce practices in Nigeria. These included access to legal services, effective government policy and institutional support, time and fair interpretation of the law governing e-commerce, continuous evaluation of the ecommerce processes in Nigeria, increased awareness and familiarity with e-commerce facilities, and the adoption of suitable technology. The study provides valuable insight into the support of the Nigerian commercial sector on e-commerce practices. The adoption of systems theory enhances the promotion of fairness across the entire ambience of e-commerce practice and the support of the law. This implied focusing on the continuous evaluation of legal support and a flexible process of developing the needed approaches to address emerging changes in e-commerce that can enhance business sustainability in Nigeria

Whistleblowing and interpretation, addressing organizational challenges: a conceptual reflection from Nigeria

Purpose – This study aims to explore the effect of whistleblowing and interpretation among practitioners in the Nigerian economy. The research puts a premium on understanding the relevance and critical issues in its practices and developing an improved model for the effective practice of whistleblowing and interpretation in Nigeria. Design/methodology/approach – This study adopted a conceptual approach, relying on extant literature to understand the management of whistleblowing incidents and identify the managers’ and other stakeholders’ responsibility in the whistleblowing process. It applied systems dynamics conceptual modelling and presented an improvement approach to addressing the complexities associated with whistleblowing and interpretation among Nigerian organizations. Findings – This study contributed to the extant literature by developing a model for proper management of whistleblowing in the Nigerian context and enhancing the robust practice of whistleblowing and interpretation in Nigeria. The findings highlighted critical factors such as managers’ skills development, legal system support, institutional stakeholders’ function and ethical balance as key factors to effective whistleblowing management and interpretation. This implies that the act of identifying and developing responses to an emerging case of whistleblowing requires a process of developing underpinning assumptions, engagement and consideration of stakeholders’ interests while driving the sustenance of organizational focus. Originality/value – This study emphasized the departure from absolute best practice to developing idea approaches that reflect stakeholders’ interests and the context of whistleblowing and interpretation. While the study acknowledges limitations in the sole focus on the Nigerian private sector and the Nigerian economic background, it recommends further exploration of whistleblowing and its interpretation on a comparative approach, to improving the current understanding of the topic

Whistleblowing and interpretation, addressing organizational challenges: a conceptual reflection from Nigeria

Purpose – This study aims to explore the effect of whistleblowing and interpretation among practitioners in the Nigerian economy. The research puts a premium on understanding the relevance and critical issues in its practices and developing an improved model for the effective practice of whistleblowing and interpretation in Nigeria. Design/methodology/approach – This study adopted a conceptual approach, relying on extant literature to understand the management of whistleblowing incidents and identify the managers’ and other stakeholders’ responsibility in the whistleblowing process. It applied systems dynamics conceptual modelling and presented an improvement approach to addressing the complexities associated with whistleblowing and interpretation among Nigerian organizations. Findings – This study contributed to the extant literature by developing a model for proper management of whistleblowing in the Nigerian context and enhancing the robust practice of whistleblowing and interpretation in Nigeria. The findings highlighted critical factors such as managers’ skills development, legal system support, institutional stakeholders’ function and ethical balance as key factors to effective whistleblowing management and interpretation. This implies that the act of identifying and developing responses to an emerging case of whistleblowing requires a process of developing underpinning assumptions, engagement and consideration of stakeholders’ interests while driving the sustenance of organizational focus. Originality/value – This study emphasized the departure from absolute best practice to developing idea approaches that reflect stakeholders’ interests and the context of whistleblowing and interpretation. While the study acknowledges limitations in the sole focus on the Nigerian private sector and the Nigerian economic background, it recommends further exploration of whistleblowing and its interpretation on a comparative approach, to improving the current understanding of the topic

Achieving operational resilience through kaizen practice: a case in a commercial livestock farm in Nigeria

Purpose – This study is focused on achieving operational resilience through the practices of kaizen across the operational structure. The research is based on a case study of a commercial livestock farm in Nigeria. The study views the practice of kaizen from the perspective of the commitment of the members of the case study organisation who are directly involved with the operations of the organisation. Design/methodology/approach – The study applies a qualitative approach to explore the topic, engaging members of the case study organisation in the research to gather relevant data on the implementation of kaizen practices and the drive to attain resilience in the case study organisation. Semi-structured personal interviews and workshops were used for data collection. The study adopts systems theory to explore the topic, identifying and engaging relevant stakeholders. Findings – Parts of the findings relating to kaizen are the issues with the livestock production process, aggressive leadership and the issue of livestock mortality in the case study organisation. These were discussed based on extant literature. The study affirms the importance of organisational members’ commitment and adequate leadership support to achieve sustainable kaizen practices. The study highlights the need to align kaizen practices with relevant organisational practices, such as reward systems and contextual requirements for its implementation in an operational process. The study suggests that further study can focus on the dynamics of the legal system on the implementation of kaizen, especially from a developing economic background like Nigeria, where this study was conducted. Originality/value – The study projects learning about the spatial factors that can affect the practices of kaizen in critical sectors like livestock managemen

Transmission of risks between energy and agricultural commodities: Frequency time-varying VAR, asymmetry and portfolio management

This paper examines energy and agricultural commodities' short-run and long-run connectedness by using the Time-varying parameter vector autoregressions (TVP-VAR). It applies the frequency version of the TVP-VAR model, which is a modified version of the dynamic TVP-VAR model. The frequency decomposition definition also decomposes into short-run and long-run connectedness. We further the analysis by investigating the effect of asymmetry in returns on connectedness. It also examines how portfolio management strategies would lead to a maximization of profits with minimal risks. Empirical evidence indicates that only 32.52% and 31.38% of connectedness in oil and gas, respectively, are transmitted to agricultural commodities, which suggests their weak tendencies in influencing agricultural commodities; the total connectedness index hovers around 40-60% in the 2018-2019 period; however, it dropped below 40% in 2020-2021 when the COVID-19 pandemic contributed to disintegrate the connectedness between energy and agricultural commodities but increased further during the 2022 Russia-Ukraine saga. The findings also indicate that corn, wheat, and flour are net transmitters of risks to oil and natural gas in the long and short-run, and wheat-flour pairwise connectedness is the strongest in the connectedness. Asymmetry is also pronounced in the network of connectedness. Portfolio analyses indicate that investors require a low proportion of energy in a portfolio of energy-agricultural commodities to achieve an optimum profit. The findings will offer exciting insights into the connectedness of agricultural and energy commodities, particularly during periods of high price uncertainty

Do Publicly Listed Insurance Firms in Saudi Arabia Have Strong Corporate Governance?

Saudi Arabia has now opened its markets to foreign investors in line with its strategy to diversify its economy. However, investors need to feel confident that Saudi enterprises are being monitored and regulated appropriately. This study identifies the impact of improvements in Saudi corporate governance practices among insurance firms. The effects of corporate governance on the financial performance of 35 insurance firms listed on the Saudi stock market are examined from 2008 to 2014, including Shariah-compliant and life insurance firms. Four different methodologies are used: the generalised least squares random effect, fixed effect models, a difference-in-differences (DID) measurement for comparisons, and the probit model with average marginal effect to address endogeneity. The results indicate that firm performance is affected by information asymmetry. The 2009 exogenous shock from the Saudi regulatory change to board composition and audit committee size shows a positive effect on performance in the DID comparison. However, an increase in independent board and audit committee members has a significant negative effect. Other findings indicate that an increase in CEO (Chief Executive Officer) age has a positive effect on performance, as do three pay variables (director incentives, CEO and top executive pay, and above-the-mean director incentives). However, when CEO and top executive pay increases above the mean, the effect turns negative; this also happens with a change in CEO from poor performance. The results support the importance of Saudi insurance industry corporate governance regulation and reflect the improved governance perspectives of the Saudi Capital Market Authority and Saudi Arabian Monetary Agency

Board risk committee composition and risk-taking of deposit money banks in Nigeria

AbstractRisk oversight by bank boards has become complex due to the evolving nature of risk and thus the need for risk committees to effectively and adequately monitor bank risktaking. The risk taking capability of a financial institution is largely a function of its risk management committee composition. While studies have examined the effect of risk committee dynamics on several organisational variables, few studies examined the relationship between risk committee composition and the risktaking behaviours of banks. However, these few studies are limited to examining the effect of the existence of a standalone risk committee. Hence, the main purpose of this study is to examine the effect of banks’ board risk committee composition on the risktaking behaviour of deposit money banks in Nigeria. The study used a sample of twelve deposit money banks listed on the Nigerian Exchange Group (NGX) from 2009 to 2020. Data were analysed using DriscollKraay’s Robust Standard Errors for Panel Regressions with Cross-Sectional Dependence (SCC) model to address heteroskedasticity and cross-sectional dependence. The results showed that risk committee independence and financial expertise reduce risk-taking. It, therefore, showed that the independence and financial expertise of the risk committee provide the needed competency and independence to effectively monitor risk-taking. The study, therefore, recommends, among others, the review of the composition of the board risk committee to reflect independence and expertise. The study differs from other studies by examining risk committee composition rather than its existence

The role of judicial efficiency in the board size-financial performance nexus: Evidence from microfinance institutions

The exact effect of board size on financial performance has remained inconclusive in the empirical literature. We seek to contribute to this literature by assessing the impact of board size on the financial performance of 408 microfinance institutions (MFIs) for 2010 to 2018 financial years. Besides, we explore whether judicial efficiency exerts any significant effect on the board size-performance nexus. Using the System Generalized Method of Moments estimator as the main analytical technique, we observe that board size has a strong negative effect on the financial performance of MFIs in both the short and long run. In addition, the results show that MFIs that operate in an environment where the judicial system is efficient are likely to experience the positive impact of board size on their financial performance

Does macroeconomic misery index matter in the micro firm-level earnings Management – performance nexus? Evidence from dynamic Panel threshold regression

AbstractEarnings management (EM) and its association with firm performance has been a subject of research interest for decades. This study re-examines the EM—firm performance nexus in a novel way using a nonlinear framework and introducing macro-economic misery index (MI) as a possible threshold variable in the analysis. 52 sampled non-financial listed firms are drawn from nine emerging sub-Saharan African countries spanning a period of 2007–2019. The study employs the dynamic panel threshold estimation approach in analyzing its models. By using MI as a threshold variable, the results show new findings of the performance effect of EM contingent on a uniquely identified MI threshold of 22.51. The study finds that the performance-enhancing effect of EM is realized only when a firm’s MI is below the identified threshold. Above this threshold, the effect of EM on performance is negligible or sometimes adverse. The estimated nonlinear effect of EM on firm performance and the threshold of MI can be benchmarks for Africa and other emerging countries. The findings suggest important implications for national governments in adopting policies that help to minimise the economic misery of the citizenry, as they would generally inure to the greater good of businesses and their varying stakeholders