After defining sustainability and sustainable investments in the introduction, we explored the dimensions of sustainable investments and firm performance. This section of the paper explores the different studies conducted by previous authors. A few of them are elaborated on below.
2.1. Sustainable Investment and Sustainable Practices
Expanding on sustainability, Ref. [
12] explored the multifaceted nature of corporate sustainability beyond the confines of the traditional triple bottom line. This study delved into the implications of sustainable resource management, assessing how companies influence society and the environment while efficiently using resources. Utilizing the “topics” theory, the researchers made a striking observation: companies must prioritise environmental efficiency and societal well-being, particularly within the resource-scarce context of the Chinese car industry. Mining for natural resources and its consequences were the subject of investigation in the study by [
13] spanning two decades in China, from 2001 to 2020. This research dissected how resource mining affects China’s economy, environment, and sustainability. The results painted a nuanced picture: while resource extraction bolstered the economy, it simultaneously harmed the environment. Education, innovation, and eco-friendly approaches emerged as mitigating factors. Education and innovative green ideas had the potential to temper the adverse effects of resource mining, transforming a potential resource curse into a blessing. Shifting our focus to governance and policy, Ref. [
14] explored the governance dynamics and its influence on sustainable economic growth in Saudi Arabia, with a particular emphasis on the ‘Vision 2030’ initiative. The researchers posited a counterintuitive notion through rigorous statistical methods: good governance might decelerate economic growth. However, citizen participation, a robust rule of law, and effective anti-corruption measures offset this slowdown, which collectively contributed to sustainable economic progress.
The fusion of artificial intelligence and natural resources took centre stage in the research conducted by [
15] spanning four decades, from 1981 to 2021, within the context of China. Their inquiry extended to additional variables, including interest rates, inflation, trade openness, and government spending. The findings were illuminating: the combination of AI and sustainable resource management appeared to fuel economic growth in China over this period, while high interest rates and inflation were observed to have detrimental effects on both short-term and long-term financial prospects. In Ref. [
16], the authors examined the multifaceted role of businesses with broader missions in enhancing sustainable performance. The study, involving an analysis of 115 listed companies, underscored the potential for top-level management to enhance sustainability through Corporate Social Responsibility (CSR) disclosure and dividends. This approach serves as a signal for future sustainable performance. These results echoed similar findings, emphasizing the value of dividends and CSR disclosure to institutional investors. In Ref. [
17], the authors illuminated the intersection of sustainable business practices and frugal innovation, which entail resourceful and cost-effective product and service creation methods. Their inductive study, employing multiple case methods, suggested that businesses harnessing frugal innovation could generate profits and address pressing social issues. These endeavours encompass empowering women, enhancing the quality of life, providing affordable healthcare to underserved populations, and embracing environmental responsibility. Furthermore, the study suggested that sustainable business could open new markets in developing countries, fostering inclusive growth. Shifting our focus to Ghana’s textile industry, Ref. [
18] delved into the relationship between future-oriented practices, the Triple Bottom Line (TBL), and sustainability. Employing quantitative research methods and a suite of statistical analyses, they examined the manufacturing processes of Ghana’s textile firms. Their assessment, supported by standards and certification indicators, encompassed a range of metrics and tools. The study presented a comprehensive evaluation of production sustainability and underscored the significance of the Triple Bottom Line in shaping the industry’s sustainability profile. Lastly, Ref. [
19] tackled the challenge of measuring social sustainability, a goal many African countries aspire to achieve. This endeavour involved a mixed statistical method that explored 50 distinct social sustainability metrics across various dimensions. Surveys were conducted with senior managers and business owners from 110 companies in Ghana, representing both private and public sectors. The outcome was the identification of 26 specific measures of social sustainability, categorizing them into seven broad dimensions: community, equity, poverty alleviation, human rights, ethics, employee welfare, and regulatory compliance.
In Ref. [
20], the authors delved into sustainable strategies in manufacturing firms, scrutinizing the influence of social and environmental innovations. They examined the impact of these innovations on firm performance, gauged through longitudinal financial data. The research, grounded in quantitative methodology and data from a survey of Norwegian manufacturing firms, aimed to assess aspects of sustainability strategies’ value creation, cost reduction, and risk mitigation.
To illuminate the global efforts toward a more sustainable world by 2030, Ref. [
21] analysed two crucial dimensions. The Environmental Performance Index and the country’s risk score, reflecting political stability, were used to evaluate countries’ environmental protection efforts and manage their economic and political systems. By studying data from 163 countries, the research aimed to assess how effectively countries protect their environments while maintaining political and economic stability.
In a 2023 study, Ref. [
22] delved into the world of Indonesian companies, focusing on Sustainable Management Control Systems (SMCS) and eco-innovation. They sought to discern the influence of Supply Chain Management (SCM) and digital adaptability in this context. The research revealed that SMCS and eco-innovation are pivotal in pursuing sustainable profitability. However, the relationship between SCM and digital adaptability appeared more complex. Significantly, this study is limited to Indonesian firms, and the data should always be approached with caution due to potential inaccuracies.
Additionally, causality remains challenging to establish within this intricate web of factors. Turning our focus to the global stage, Ref. [
23] investigated how specific practices in supply chain management within sharing economy platforms impact Sustainable Development Goals (SDGs). Sustainability, addressing economic and environmental facets, is a global imperative. The study concentrated on three critical aspects of Sustainable Supply Chain Management (SSCM): environmental, economic, and societal. Surveys targeting 260 Chinese customers with a sharing economy experience were conducted through electronic questionnaires, with data analysed using AMOS. The results underscored a significant connection between SSCM practices within sharing economy platforms and the achievement of SDGs. In the energy systems domain, Ref. [
24] delved into the determinants of RES, focusing on the resilience of energy systems. Employing a panel regression model and combining it with a DSGE model based on RES shock response mechanisms, they sought to assess the impact of Renewable Energy Sources (RESs) on economic sustainability. Their findings illuminated various pathways, suggesting that enhancing RESs can be achieved through energy transition, infrastructure development, research, development, and tax rate adjustments. These outcomes offer insights into modernizing energy systems.
In terms of data analytics and sustainability, Ref. [
25] demonstrated the potential of big data-based tools in assessing a company’s impact on social sustainability. Their method was tested using real-life data from the Impact-Weighted Account Project at Harvard Business School. The results confirmed that big data technology can effectively guide companies in aligning their operations with the United Nations’ Social Sustainable Development Goals.
2.2. Sustainable Investments and Firm Performance
In the realm of contemporary academic research, a compelling narrative unfolds, intertwining sustainability and profitability in the financial world. Several studies vividly picture this complex relationship, offering valuable insights into how sustainable investments, environmental considerations, and financial performance shape the modern financial landscape. The current study has segregated sustainable investments into three broad categories: environmentally, economically, and socially sustainable [
26].
H1. Environmentally sustainable investments influence the firm performance positively.
Turning to renewable energy, Ref. [
27] embarked on a comprehensive exploration. The research encompassed an evaluation of solar and wind energy’s financial impact on companies in various public and private markets from 2000 to 2017. Their analysis illuminated the potential financial benefits of solar energy, which tended to yield a higher Return on Assets (ROA). However, it also hinted at a trade-off, with public companies experiencing lower Return on Equity (ROE). Shifting our gaze to Italy, Ref. [
28] explored the fusion of clean production in the circular economy with the mission statements of firms. Through a comprehensive examination of the firm’s mission statements on public media platforms like LinkedIn, themes revolving around sustainability, technology, production, and consumption emerged, reflecting the intricate relationship between corporate missions and sustainable investments [
29]. Focusing on Chinese listed companies, the data has been collected from 2010 to 2020. This paper explores the relationship between institutional investors and green innovation by exploring their sustainable identity. It also focuses on management’s role in developing sustainable strategies and shows their efforts in achieving sustainable goals. This paper emphasizes the importance of government policies’ role in implementing green innovation. Heading south to Mexico, Ref. [
30] probed the influence of eco-friendly regulations on car companies. Their study showcased the financial advantages of green supply chain management and eco-friendly practices, offering valuable insights into environmentally conscious business strategies. In Iberia [
31], the relationship between various factors and the quality of environmental disclosure within companies in Portugal and Spain from 2010 to 2017 was dissected. Their findings suggested that female representation on boards positively influenced both financial and sustainable performance, underscoring the need for diverse leadership. Moreover, their research indicated the interdependence of sustainable investments and financial circumstances, challenging the effectiveness of regulatory measures mandating certain sustainability practices within companies.
H2. Economically sustainable investments influence the firm performance positively.
In 2023, Ref. [
32] ventured into the transformative realm of cryptocurrencies, seeking to understand their potential to reshape the traditional financial system. Through a model rooted in the “Expectation Confirmation Theory,” Arpaci examined the sustainability and profitability of cryptocurrencies as a viable investment option. Employing both structural modelling and neural networks, the research yielded a striking revelation: 74% of the variance could be attributed to the financial sustainability of cryptocurrencies. This discovery underscores the intriguing prospect of artificial neural networks (ANNs) as a potent tool for forecasting the viability of cryptocurrencies. While Arpaci’s work provided a tantalizing glimpse into the cryptocurrency domain, Ref. [
22] explored the dynamics of sustainable financial performance. They focused on Indonesian companies and the intricate relationship between Sustainable Management Control Systems (SMCSs), eco-innovation, and supply chain management policies. By administering meticulous surveys directed at top-level management, this study uncovered a tangible influence of SMCSs and eco-innovation on sustainable financial performance. It offered a valuable perspective that enriched the realm of managerial decision-making. Meanwhile, Ref. [
33] explored the intersection of technology and financial services, particularly in the context of developing countries. Their research covered the period from 2004 to 2020 and employed data and mathematical techniques to discern the connection between enhanced access to financial services and technology and economic growth. Their work pointed to a symbiotic relationship between technology, financial services, and economic development, potentially catalysing growth in developing nations [
34]. The paper develops the Sustainable Product Impact (SPI) Index to bridge the gap between Sustainable Development Methodologies and firm financial outcomes. This paper focuses on the effect of sustainable product development on a company’s financial performance. It also emphasizes the impact of sustainable products on the bottom line of the firm’s financial performance. Lastly, it highlights enhancing firms profitably and increasing adaptability and responsible corporate citizenship. In Ref. [
35], the authors focused on the economic landscape of Ghana, addressing the escalating concerns surrounding the country’s mounting debt. After employing cointegration and regression techniques, their findings suggested a positive correlation between rising domestic debt in Ghana and overall economic growth, providing a nuanced perspective on the country’s fiscal challenges. Amid these diverse and illuminating academic investigations into sustainability and profitability, one crucial aspect that remains relatively unexplored is how these dynamics may vary depending on the nature of the sector, whether public or private. While the studies we have traversed have provided valuable insights and shed light on the intricate relationship between sustainability practices, environmental considerations, and financial performance, they have primarily examined these relationships across various industries and regions.
H3. Socially sustainable investments influence the firm’s performance positively.
Ref. [
36] took a broader view, assessing how environmental, social, and governance (ESG) factors impact company performance. Their dataset spanned over 180 globally listed companies in the utility sector from 2018 to 2021. Through an innovative approach involving market-based and accounting-based responses, they discovered specific combinations of ESG activities that significantly influenced financial performance. Intriguingly, their findings suggested that the “E” and “S” aspects of ESG were pivotal in determining financial success, hinting at a nuanced approach to sustainability in the corporate world. In Ref. [
37], the authors’ research zoomed into the European landscape, investigating the relationship between a company’s ESG reputation and financial performance. Additionally, they considered the impact of European Union regulations and the disruptive force of the COVID-19 pandemic. Their extensive dataset from 2007 to 2021 unveiled a compelling narrative: companies with robust ESG reputations experienced reduced information uncertainty, faced fewer financial constraints, and displayed superior financial performance. In Ref. [
38], the authors shifted their focus to Vietnam, scrutinizing the interplay between sustainability and financial performance in listed companies from 2012 to 2017. Their dual-model analysis revealed intriguing dynamics: companies emphasizing social responsibility did not significantly harm their financial performance. In contrast, those emphasizing environmental responsibility seemed to experience a more pronounced negative effect. Transitioning to Islamic banking and financial institutions, Ref. [
39] explored the synergy between Islamic corporate governance and sustainability performance. Their research demonstrated that strong corporate governance, influenced by Shariah board attributes and ownership structure, was pivotal in ensuring financial stability and sustainability within Islamic financial institutions. Understanding how these relationships are shaped by sector-specific characteristics, governance structures, and market forces can offer a more nuanced and comprehensive perspective. This research, therefore, delves deeper into the sectoral nuances, considering the distinct challenges and opportunities faced by public and private companies. It uncovers sector-specific strategies and dynamics that influence the interplay between sustainability and financial performance, thus enriching our understanding of this complex and evolving narrative. A 2023 study conducted by [
40] investigated the corporate sustainability practices of 65 listed Indian firms using the ESG score. The research reveals that the sustainability practices of listed companies significantly impact the firm’s performance. Further analysis has found that among the three significant variables of sustainability, firms’ social and governance activities had a significant positive impact on their performance. In contrast, environmental activities had a negative and insignificant association with firm performance. In Ref. [
41], the authors focused on whether ESG performance impacts sustainability through firms’ innovation in Bangladeshi manufacturing industries. The paper examines the fact that the higher the environmental performance of manufacturing firms, the better their sustainability performance. The variables in ESG include air emission, hazardous and harmful material consumption, and frequent environmental accidents. It has been found that reducing these variables can enhance the firm’s environmental performance. Moreover, enhancing environmental performance can achieve innovation in product development. In another realm, Ref. [
42] delved into manufacturing firms’ challenges in implementing social sustainability practices. Their investigation employed an approach known as Interpretive Structural Modelling (ISM), which aims to analyse the contextual relationships among key barriers and rank them in importance. The findings highlighted critical barriers to successful social sustainability practices, mainly related to the low levels of internal encouragement programs and the limited involvement of operational staff in planning and supporting policies.