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Impact of Sustainability Reporting on Investment Decisions in the Nigerian Capital Market

Abstract

Sustainability reporting has become an essential component of contemporary corporate reporting, enabling organizations to communicate their environmental, social, and governance (ESG) performance alongside traditional financial information. As investors increasingly consider non-financial factors in evaluating corporate value and long-term sustainability, sustainability reporting has emerged as a critical source of information for investment decision-making. High-quality sustainability reports provide insights into a company's environmental stewardship, social responsibility, corporate governance practices, climate-related risks, human capital management, and long-term value creation strategies. In Nigeria, growing emphasis on sustainable finance, responsible investment, corporate transparency, and environmental accountability has increased the relevance of sustainability reporting among companies listed on the Nigerian Exchange Group (NGX). Regulatory institutions such as the Financial Reporting Council of Nigeria (FRCN), the Securities and Exchange Commission (SEC), and the Nigerian Exchange Group (NGX) continue to encourage listed companies to strengthen sustainability disclosures in line with international best practices, including the International Sustainability Standards Board (ISSB) framework. Sustainability reporting is expected to reduce information asymmetry, enhance corporate transparency, improve stakeholder confidence, and facilitate more informed investment decisions within the Nigerian capital market. However, challenges including inconsistent disclosure practices, inadequate sustainability reporting expertise, limited assurance of sustainability information, high compliance costs, and varying levels of reporting quality continue to affect the usefulness of sustainability reports for investors. Although previous studies have examined Environmental, Social, and Governance (ESG) reporting and corporate performance, empirical evidence regarding the impact of sustainability reporting on investment decisions in the Nigerian capital market remains limited and inconclusive. Against this background, this study investigates the impact of sustainability reporting on investment decisions in the Nigerian capital market. The study is anchored on Stakeholder Theory, Signaling Theory, and the Efficient Market Hypothesis (EMH). Stakeholder Theory posits that organizations create long-term value by providing transparent and relevant information that satisfies the information needs of investors, regulators, employees, customers, creditors, and other stakeholders. Signaling Theory argues that companies adopting comprehensive sustainability reporting communicate positive signals regarding sound corporate governance, environmental responsibility, effective risk management, and long-term financial stability, thereby influencing investors' perceptions and investment decisions. The Efficient Market Hypothesis explains that investors incorporate publicly available sustainability information into security prices, leading to more efficient capital allocation and investment decisions. Collectively, these theoretical perspectives provide a comprehensive framework for explaining the relationship between sustainability reporting and investment decisions in the Nigerian capital market. The study adopts a quantitative research design using a structured questionnaire administered to institutional investors, retail investors, stockbrokers, portfolio managers, investment analysts, fund managers, financial analysts, accountants, auditors, and other participants in the Nigerian capital market. A stratified random sampling technique will be employed to ensure adequate representation of respondents from stockbroking firms, asset management companies, pension fund administrators, investment advisory firms, listed companies, financial institutions, and regulatory agencies. Primary data collected from respondents will be analyzed using descriptive statistics to summarize respondents' demographic characteristics and perceptions regarding sustainability reporting and investment decisions. Structural Equation Modeling (SEM) will be employed to examine the impact of sustainability reporting on investment decisions. The measurement model will be evaluated using Cronbach's Alpha, Composite Reliability (CR), Average Variance Extracted (AVE), and Confirmatory Factor Analysis (CFA) to establish the reliability and validity of the research instrument. Additional diagnostic tests, including multicollinearity assessment, common method bias analysis, and model fit indices such as the Comparative Fit Index (CFI), Tucker-Lewis Index (TLI), Root Mean Square Error of Approximation (RMSEA), and Standardized Root Mean Square Residual (SRMR), will be conducted to ensure the adequacy, consistency, reliability, and robustness of the structural model. The study anticipates that sustainability reporting will have a significant positive impact on investment decisions in the Nigerian capital market. Comprehensive sustainability disclosures are expected to improve investors' access to relevant non-financial information, reduce information asymmetry, strengthen corporate transparency, and enhance confidence in the long-term prospects of listed companies. Sustainability reporting is also anticipated to improve investment risk assessment by providing valuable information on environmental risks, climate-related exposures, social responsibility initiatives, governance quality, and long-term business resilience. Furthermore, companies producing high-quality sustainability reports are expected to attract greater institutional and foreign investment, strengthen market valuation, improve share liquidity, enhance corporate reputation, and increase shareholder confidence. Conversely, inadequate sustainability disclosures, inconsistent reporting practices, greenwashing, and weak assurance mechanisms may reduce investor confidence, increase uncertainty, and negatively influence investment decisions. Consequently, effective sustainability reporting is expected to contribute significantly to informed investment decision-making, improved market efficiency, enhanced corporate accountability, and sustainable capital market development in Nigeria. This study is expected to make significant theoretical and empirical contributions to the literature on accounting, finance, sustainability reporting, and capital market studies by providing robust evidence on the relationship between sustainability reporting and investment decisions in the Nigerian capital market. Unlike previous studies that focused primarily on ESG performance or corporate financial performance, this research specifically evaluates sustainability reporting as a strategic corporate disclosure mechanism influencing investment decisions using primary data and Structural Equation Modeling (SEM). The findings will provide valuable insights for the Financial Reporting Council of Nigeria (FRCN), the Securities and Exchange Commission (SEC), the Nigerian Exchange Group (NGX), listed companies, institutional and retail investors, investment analysts, professional accounting bodies, policymakers, sustainability practitioners, and academic researchers regarding the strategic importance of sustainability reporting in promoting transparency, investor confidence, and capital market efficiency. The study will also provide evidence-based recommendations for strengthening sustainability reporting practices, enhancing compliance with IFRS Sustainability Disclosure Standards, improving independent assurance of sustainability information, promoting investor awareness of sustainability issues, reinforcing corporate governance, and fostering sustainable growth and competitiveness within the Nigerian capital market.

Keywords: Sustainability reporting, investment decisions, Nigerian capital market, Environmental, Social, and Governance (ESG), corporate transparency, investor confidence, IFRS Sustainability Disclosure Standards, Structural Equation Modeling (SEM), listed companies, Nigeria.