BP神经网络股票建模,随着股票市场混沌和分形理论的逐步确立，人们开始利用神经网络对证券市场的变动加以预测。本文的研究目的在于为股市提供一种基于BP神经网络的股价预测方法，以便提高股价预测时的运算速度和精确度，为股票市场的个人投资者和机构投资者提供新的实用方法。(BP Neural network stock modeling, with the stock market chaos and fractal theory gradually established, people began to use the neural network to predict the stock market changes. The aim of this paper is to provide a method of stock price forecasting based on BP Neural network in order to improve the calculation speed and accuracy of stock price forecasting, and to provide new practical methods for individual investors and institutional investors in stock market.)