Novel time series analysis and prediction of stock trading using fractal theory and time delayed neural network

The stock markets are well known for wide variations in prices over short and long terms. These fluctuations are due to a large number of deals produced by agents and act independently from each other. However, even in the middle of the apparently chaotic world, there are opportunities for making good predictions [ I ] . In this paper the Nikkei stock prices over 1500 days from July to Oct. 2002 are analyzed and predicted using a Hurst exponent (H), a fractal dimension (D), and an autocorre~ation coefficient (c). They are H = 0.6699 D=2-H=1.3301 and C = 0.26558 over three days. This obtained knowledge is embedded into the structure of our developed time delayed neural network 121. It is confirmed that the obtained prediction accuracy is much higher than that by a back propagation-type forward neural network for the short-term. Although this predictor works for the short term. it is embedded into our developedfiruy neural network [3] to construct multi-blended local nonlinear models. It is applied to general long term prediction whose more accurate prediction is expected than that by the method proposed in [I].