The paper is well-conceived and the authors have weighed in on the academic importance and contribution of the paper. Certainly, the topic of the paper is current, especially when it comes to the sustainability of the financial markets. The conducted study provides an overview by developing four fund portfolios. The paper is a bit too extensive, so the reviewer's proposal is to shorten the conclusion and to transfer certain concluding considerations, especially regarding future directions of research, to another section of the paper (shorten). The reviewer's suggestion is to expand the literature, i.e. to add references from authors who have dealt with the issue of sustainable markets. It would be good if authors who dealt with green finance were added to the paper, because the paper itself is actually related to green finance, which mainly refers to the process of respecting environmental and social aspects when making investment decisions, which leads to increased investments in long-term and sustainable activities and thus economic growth and development of the business environment in accordance with the principles of global sustainable development.