Treball Final de Grau en Finances i Comptabilitat. Codi: FC1049. Curs: 2018/2019 This document analyses the microfinance investment vehicles that finance MFIs and facilitates their access to the international market, thus boosting microfinance. Given the current growing interest in socially responsible business investments, the function of these vehicles is progressing considerably. It can be stated that they are a good investment opportunity due to their negative relationship with the markets. In the Spanish instance, there are representative cases for their involvement in impact finance. Despite its great importance, few papers analyse in depth the MIVs, which hinder the analysis of them. Through their clear information, a more complete comparison analysis could be made in the Spanish case in the future, to decide which one is supposed to be a better investment.