股票收益率预测的人工神经网络检验
Stock returns forecast: an examination by means of Artificial Neural Networks
摘要:
几十年来,有效市场假说的有效性一直受到严格的审查。然而,反对它的证据并不确凿。人工神经网络提供了一种无模型的方法来分析过去收益对当前收益的预测能力。本章利用反向传播人工神经网络分析了巴西股票市场的可预测性。我们从Bovespa指数中选取了20只股票,根据不同的市价总值,作为股票规模的代理。我们发现,可预测性与资本化有关。特别是,较大的股票比较小的股票更难预测。
英文摘要:
The validity of the Efficient Market Hypothesis has been under severe scrutiny since several decades. However, the evidence against it is not conclusive. Artificial Neural Networks provide a model-free means to analize the prediction power of past returns on current returns. This chapter analizes the predictability in the intraday Brazilian stock market using a backpropagation Artificial Neural Network. We selected 20 stocks from Bovespa index, according to different market capitalization, as a proxy for stock size. We find that predictability is related to capitalization. In particular, larger stocks are less predictable than smaller ones.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。