The purpose of the article is to present the interconnection between the financial market, sustainable development and soft-law rules in today’s economy we have an overlapping process in the financial markets between general investment based on financial efficiency and investment concerning social responsibility – including ESG criteria (environmental-social-governance). The concept of sustainable development may be defined as a tool leading not only to economic growth but in the long term also as a solution leading to the elimination of the disproportions and instabilities within a society. The COVID pandemic and the war in Ukraine showed, that today we require some new legal instruments and techniques that could help in the realization of goals of sustainable development and that would ensure legal stability. The methodology used by the author is related to the functional approach of the comparative legal method, the historical-descriptive and the dogmatic method, with a special focus on French and international law regulations. Comparative method is both a science, a research method and the effects of research obtained from the application of the comparative studies. Comparative studies, as a science of comparing selected aspects of different legal systems, is aimed at learning and understanding law in a much broader context, because at the supranational level. It is this aspect that makes comparative research extremely important for sustainable development rules, which are often characterized by a cross-border and international character. The scientific aim of the work is to show whether and how soft important law provisions especially in the financial market, as well as regulations with the force of law, can be a useful instrument supporting the process of building sustainable finance. As part of the conclusions, the author notes that the use of the described legal structures may contribute to faster and more effective implementation of sustainable development regulations. The above is even more important when these regulations appear from a supranational perspective rather than from a national perspective.
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