The LCA (Agribusiness Letter of Credit) is a fixed income security issued by financial institutions, backed by loans and financing granted by these financial institutions and related to agribusiness. When investing in LCAs, you invest your money in a financial institution and, in return, you are entitled to receive the amount you invested plus the expected return on the LCA at a predefined date. Its yield can be referenced to a fixed rate or a floating rate, in which the yield is linked to the variation of an index or indicator, such as the CDI or the IPCA.