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1.
股票预测是一种非线性、不确定的时间序列问题,传统方法很难对其进行准确预测.本文分析了支持向量机(SVM)在股票预测中应用的可行性.并通过邯郸钢铁股票数据对该方法进行了检验,结果显示,支持向量机具有较强的泛化能力.  相似文献   

2.
鉴于支持向量机在股票现货市场预测中的大量使用并证明其有良好的拟合效果,为探究该方法是否适用于股指期货市场.选取上证50股指期货2015年4月16日-2019年12月31日的市场行情数据为研究对象,通过MATLAB建立支持向量机预测模型,使用MATLAB中的Libsvm工具箱对数据进行实证分析.结果表明,支持向量机在股指...  相似文献   

3.
本文以上证综合指数2011年1月4日到2018年1月4日的股市行情为研究对象进行实证分析,建立了一个支持向量机回归机的预测模型。实证分析主要基于MATLAB软件嵌套Libsvm工具箱实现。实证分析结果表明,本文建立的针对股市预测的支持向量机回归机模型是有效的。  相似文献   

4.
随着金融市场的不断发展,对于股指期货的预测变得十分必要.本文首先介绍了支持向量机并且分析了支持向量机的原理,并且建立了基于支持向量机的股指期货合约价格预测模型,最后应用实例验证其科学性.  相似文献   

5.
汇率的预测研究一直是国际金融领域研究的一个热点。混沌时间序列的建模与预测的关键是相空间重构和非线性函数逼近,基于汇率时间序列存在混沌特征的特点,利用相空间重构技术对汇率时间序列进行重构,然后利用支持向量机作为非线性函数逼近,构建了一种基于支持向量机回归(SVR)的汇率预测模型。采用美元兑人民币的日汇率进行实证研究,结果表明,所构建的SVR模型能较好的反映汇率的变化趋势,预测精度较高。  相似文献   

6.
目前在多目标综合评价方面有诸多方法,层次分析法、模糊综合评价等对权重的确定主观性较大或计算过程过于复杂。本文在介绍支持向量机的基础上,依据SVM算法建立ERP实施绩效评价指标体系,以SCI公司的EPR实施为例对其实施绩效进行综合评价,得出与实际情况相符的评价结果。实例表明,将SVM算法应用在ERP实施绩效评价中高效可靠,这为ERP实施绩效评价问题提供了一种新的思路。  相似文献   

7.
张宇晨 《时代金融》2013,(24):289+293
利率期限结构一直是量化研究领域的重点课题,目前国内关于利率期限结构拟合的研究较多,而对利率期限结构的预测则研究较少,关于利用支持向量机的方法预测利率期限结构的研究更是屈指可数,本文利用支持向量机对国债的即期利率进行了拟合和预测,并与普通的时间序列线性模型对比,发现支持向量机的拟合和预测效果均好于自回归模型。  相似文献   

8.
探讨灰色系统与最小二乘支持向量机组合预测模型在波动率上的应用的可行性,通过对灰色模型进行残差修正和背景值修正以及对最小二乘支持向量机进行参数寻优,来提高组合预测模型的预测精度和推广泛化能力。经波动率预测的实证分析得出建立的组合模型比支持向量机模型有较好的预测效果。  相似文献   

9.
支持向量机(SVM)是在统计学习理论(SLT)的基础上发展起来的一种新的机器学习方法,它基于结构风险最小化原则,能有效地解决过学习问题,具有良好的推广性能和较好的分类精确性。本文采用SVM方法进行人脸识别研究,将人脸识别这一典型的多分类问题构造成适合SVM处理的二分类问题,克服了传统SVM方法在解决多分类问题上的一些缺陷。  相似文献   

10.
支持向量机(SVM)是一种崭新的机器学习方法,它建立在统计学习理论和结构风险最小化准则的基础上。此方法能解决小样本、非线性及高维模式识别中的问题。本文通过对某市公路客运量数据特征的分析,建立了基于支持向量机的客流量预测方法,与人工神经网络预测方法相比,该预测模型的平均精度较高,且具有收敛速度快、泛化能力强等优点,比较适合客流量的预测。  相似文献   

11.
我国证券市场经过数十年的发展,在不断的探索中渐渐成熟,但与发达国家的股票市场相比,还有不完善的地方。如我国证券市场的市值,并没有较好地与经济增长同比增长及契合实体经济的发展。通过研究2002-2017年的历史数据,使用支持向量机(SVM)预测证券市场的价格变化,通过误差统计分析,得出我国市场(上证交易所)与美国证券市场(纳斯达克综合指数)相比,更具不稳定性的结论。因此,可以利用套利价值(VaP)作为一种直观度量市场成熟度的参考指标。  相似文献   

12.
    
Prediction of stock close price movements has attracted a lot of research interest. Using machine learning techniques, especially statistical classifiers, for day ahead forecasting of the movement of daily close prices of a broad range of several hundreds of liquid stocks is generally not very successful. We suspect that one of the reasons for failure is the relatively high volatility of prices in the last minutes before the market closes. There have been some attempts to use less volatile daily high prices instead, but the studies concentrated only on a specific non-statistical machine learning approach on a small number of specific securities. We show that incorporating statistical classifiers for day ahead daily high price movement predictions in to some simple portfolio management techniques significantly increases their performance. Tests performed on S&P 500 stocks show that such a strategy is robust, i.e. the difference in reliability for different stocks does not vary significantly, and that such a strategy greatly outperforms the S&P 500 index and several other benchmarks while increasing the risk only by a small amount.  相似文献   

13.
以2008、2009年的送转股除权日进行事件研究,通过均值比较与检验方法,首次实证研究我国上市公司送转股后股价变化对股东财富的影响,结果发现:相对于经过调整的除权前一日的股价,2008年股票除权后,股价以高于送转股的比例单调下降;而2009年股票除权后,股价呈上升趋势,并于第14日显著高于经过调整的除权前一日的股价。除权后20天内的股价整体上高于年末股价,说明相对基于年末股价的股利决策,送转股没有降低股价。企业发放股票股利,导致股票总市值上升,增加了股东财富。  相似文献   

14.
    
We study the response of US stock market returns to oil price shocks and to what extent it behaves asymmetrically over the different phases of the business cycle. For this purpose, we decompose the oil price changes into supply and demand shocks in the oil market and assess the state-dependent dynamics of structural shocks on US stock returns using a smooth transition vector autoregression model. When nonlinearity is considered, quantitatively very different asymmetric dynamics are observed. Our findings show that the responses of US stock returns to disaggregated shocks are asymmetric over the business cycle and that the impact of demand-driven shocks on US stock returns is stronger and more persistent, especially when economic activity is depressed. Furthermore, the contribution of shocks to expectation-driven precautionary demand in recessions accounts for a larger share of the variability of US stock market returns than that predicted by standard linear vector autoregressions.  相似文献   

15.
    
We show how board diversity influences stock price crash risk. By classifying board diversity into relation-oriented diversity (gender and age) and task-oriented diversity (tenure and education), we find that greater diversity on board can lower the risk of future stock crash. Additional analyses show that the effect of board diversity on future crash risk is stronger for firms with high information opacity and low institutional ownership. Overall, our findings provide new insights and suggest for more diverse boards to improve corporate governance practices.  相似文献   

16.
    
We examine the role of social media in firm acquisitions. Twitter utilizes the “push” technology that allows firms to reduce information asymmetry by disseminating news to a broader set of investors in a timely manner. Using hand collected acquisition announcements from Twitter covering the period from 2009 to 2012, we find that the acquirer size is a main determinant of disclosing acquisition announcements on Twitter. Large acquirers announce their acquisitions on Twitter and, as a result, are able to attenuate the anticipated negative market reaction at acquisition announcement. We find no evidence that the attenuation effect of announcing acquisitions on Twitter subsequently reverses or that announcing acquisitions on Twitter is positively associated with pre-announcement earnings management. Overall, our results suggest that Twitter has become an important investor relation channel for major corporate events such as acquisition announcements and that large acquirers can use this new channel to enhance stability in their stock prices.  相似文献   

17.
物业税批量评估技术是物业税开征面临的一个关键问题,难点在于如何提高评估精度,降低评估成本。本文针对物业税批量评估技术的特点提出了一种基于最小二乘支持向量机回归的物业税税基批量评估模型,并采用数据对该模型进行验证,结果表明该模型的运算结果精度较高,建立模型所需的样本量小、成本低,在物业税批量评估问题中具有很好的应用前景。  相似文献   

18.
中国的股票价格波动及货币政策反应   总被引:9,自引:0,他引:9  
本文在阐述中国的股票价格波动情况及成因的基础上,分析中国股票价格的信息功能,并对中国的股票价格与各层次货币供应量进行协整和Granger因果检验。结果表明,从总体上看,中国的股票价格在1995年之后,具备一定的信息功能;股票价格与各层次货币供应量之间存在协整、因果关系。由此,货币当局应对股票价格波动做出反应。文章以前瞻性利率规则为基础,运用IS—PC—AP模型,采用GMM法估计出中国包含股票价格因素的货币政策反应函数。  相似文献   

19.
    
PurposeNowadays, Supply Chain Finance (SCF) has been developing rapidly since the emergence of credit risk. Therefore, this paper used SVM optimized by the firefly algorithm, which is called firefly algorithm support vector machine (FA-SVM), and applied it to SCF evaluation with a different indicator selection.Design/methodology/approachIn this paper, we used FA-SVM to assess the credit risk of supply chain finance with extracted index through correlation and appraisal analysis, and finally determined 3 first-level indicators and 15 third-level indicators. Through the application analysis, 39 SMEs (117 sample data) were selected from the Computer and Electronic Communications Manufacturing Industry as the characteristics for the input variables, to verify the improvement effect of the method relative to the LIBSVM and the classification pretest effect in the credit risk assessment of the SCF.FindingsThe results showed that FA-SVM could improve the accuracy of classification prediction compared with LIBSVM, and decrease the error rate of falseness recognize credible enterprise to untrusted enterprise.Originality/valueThis paper appliedthe firefly support vector machine in the supply chain financial evaluation for the first time. The output variable was described in a more detailed manner during the index define, and the random selection set in the process of FA-SVM data training.  相似文献   

20.
股票价格、货币政策和宏观经济波动   总被引:1,自引:0,他引:1  
本文对包含股票价格在内的新凯恩斯模型的结构方程进行估计,分析了股票价格和货币政策与宏观经济波动之间的关系,认为股票价格与宏观经济波动密切相连,货币政策调整可以平滑经济波动。在此基础上,比较了不同的货币政策规则的宏观调控效果,得到的结论是,将股票价格波动纳入货币政策的调控范围会改善货币政策效果,有助于稳定宏观经济。  相似文献   

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