In this paper, the development of a Hierarchical and Feed-Forward intelligent Fuzzy Logic system using Genetic Algorithms for prediction and modelling of fluctuations in interest rates in Australia is discussed. The system developed is used to predict quarterly and half yearly interest rates using fuzzy logic. The fuzzy rules for fuzzy logic predictor are unknown. A knowledge base must be created from the available data. In the paper Genetic Algorithm is proposed as a method for learning the fuzzy rules of the fuzzy logic predictor. A Hierarchical and Feed-Forward Fuzzy Logic system consisting of five fuzzy knowledge bases is developed to solve the prediction problem.