TY - JOUR A2 - Yu, Lean AU - Tilakaratne, C. D. AU - Mammadov, M. A. AU - Morris, S. A. PY - 2009 DA - 2009/06/17 TI - Modified Neural Network Algorithms for Predicting Trading Signals of Stock Market Indices SP - 125308 VL - 2009 AB - The aim of this paper is to present modified neural network algorithms to predict whether it is best to buy, hold, or sell shares (trading signals) of stock market indices. Most commonly used classification techniques are not successful in predicting trading signals when the distribution of the actual trading signals, among these three classes, is imbalanced. The modified network algorithms are based on the structure of feedforward neural networks and a modified Ordinary Least Squares (OLSs) error function. An adjustment relating to the contribution from the historical data used for training the networks and penalisation of incorrectly classified trading signals were accounted for, when modifying the OLS function. A global optimization algorithm was employed to train these networks. These algorithms were employed to predict the trading signals of the Australian All Ordinary Index. The algorithms with the modified error functions introduced by this study produced better predictions. SN - 2090-3359 UR - https://doi.org/10.1155/2009/125308 DO - 10.1155/2009/125308 JF - Journal of Applied Mathematics and Decision Sciences PB - Hindawi Publishing Corporation KW - ER -