• blue bonds
• social impact bonds
• green bonds
• sustainable bonds

The introduction of the Sustainable Development Goals by the United Nations helped to change the vision of all the global organizations. Now, the common focus is to create a more inclusive, fairer and more sustainable world. Finance will be the facility that will turns society towards a more sustainable future. Financial performance can no longer be the only driver that moves capital, we must use every investment to create a positive impact on our planet, whether environmental or social. This is the concept on which the Impact Finance is based. It aims to finance companies or projects that have a positive impact on the whole system. The sustainable bond market will play a key role in this transition in this transition of finance. A Sustainable Bond is a traditional bond rethought in a sustainable way. This work describes all the futures of Green Bonds, Social Bonds, Social Impact Bonds and Blue Bonds. Through an empirical analysis, the goal is to outline the current market conditions of the main categories of Sustainable Bonds highlighting the strengths and criticalities. The main objective is to provide interesting ideas on what elements should be introduced for the development of the sustainable bond market, from greater standardisation of impact measurement methodologies to a taxonomy of all possible eligible assets.