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Data mining is being actively applied to stock market since 1980s. The various aspects of stock market to which data mining has been applied include predicting stock indices, predicting stock prices, portfolio management, portfolio risk management, trend detection, designing recommender systems etc. The various algorithms and methods which have been used for the same include neural networks, association rules, decision trees, fuzzy logic, PSO (Particle Swarm Optimization), DE (Differential Evolution), GA (Genetic Algorithm) etc.[PUBLICATION ABSTRACT]