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81.
    
The latter author, together with collaborators, proposed a numerical scheme to calculate the price of barrier options. The scheme is based on a symmetrization of diffusion processes. The present paper aims to give a basis to the use of the numerical scheme for Heston and SABR-type stochastic volatility models. This will be done by showing a fairly general result on the symmetrization (in multi-dimension/multi-reflections). Further applications (to time-inhomogeneous diffusions/ to time-dependent boundaries/to curved boundaries) are also discussed.  相似文献   
82.
In this paper, we study the implied volatility smirk (IVS) of options written on the FXI, the Financial Times Stock Exchange/Xinhua China 50 Index exchange-traded fund (ETF). Using the methodology of Zhang and Xiang (2008, Quant Financ, 8, pp. 263–284), we document the empirical characteristics of the level, slope, and curvature of IVS of the FXI options. We find that, on average, IVS becomes steeper and more convex as time to maturity increases. The level and curvature are usually positive, and the slope is negative. We provide evidence that the information in the quantified IV factors has some predictive power for the future monthly FXI ETF returns.  相似文献   
83.
This paper explores the relationship between daily market volatility and the arrival of public information in four different financial markets. Public information is measured as the daily number of economic news headlines, divided in six categories of news. Statistical analysis of the news data suggests the presence of particular seasonality effects, as well as a strong degree of autocorrelation. Over the period 1994–1998, significant effects of specific news categories on the volatility of US stocks, treasury bills, bonds and dollar were detected. However, the effects – in size and duration – vary by news category and by financial market. It is demonstrated that most of the volatility persistence, as observed by GARCH models, tends to disappear when news is included in the conditional variance equation.  相似文献   
84.
    
We describe a model that predicts an asymmetric impact of disclosure on investor uncertainty. We show that good news tends to resolve more uncertainty than bad news, and that uncertainty can be revised upwards if the investors' prior belief is sufficiently strong and the signal is sufficiently bad. This result is in contrast to classical disclosure models, where new information always resolves uncertainty and the change in uncertainty depends only on the relative precision of the news. Using option-implied volatility as a proxy for uncertainty, we find strong support for our predictions. We also show that our results are robust to competing explanations, notably to the leverage effect and volatility feedback, as well as to the jump risk induced in anticipation of the earnings announcements.  相似文献   
85.
本文从四川省农业科研机构的产出能力入手来分析科研机构投入产出的效率及其影响因素,产出能力评价结果显示,四川省农业科研机构产出能力普遍较低并且差异巨大,差异主要来自于潜在产出能力;科研机构产出的现实能力和潜在能力不完全吻合.进一步分析投入产出之间的关系显示,产出的效率受到投入总量、投入结构、体制改革和机构内部管理四个要素的影响.  相似文献   
86.
国内现有关于波动率的研究多集中于时间序列模型,忽略了另一类预测波动率的方法即隐含波动率法。文章在回顾、评述了国内关于波动率的研究后,对国外关于隐含波动率的研究进行了梳理,为在我国大陆地区发展股指期权市场、通过提高期权市场的效率,以运用隐含波动率法更好地预测波动率提供了理论基础和政策建议。  相似文献   
87.
    
In this paper, we introduce a new Bayesian approach to explain some market anomalies during financial crises and subsequent recovery. We assume that the earnings shock of an asset follows a random walk model with and without drift to incorporate the impact of financial crises. We further assume the earning shock follows an exponential family distribution to accommodate symmetric as well as asymmetric information. By using this model setting, we develop some properties on the expected earnings shock and its volatility, and establish properties of investor behavior on the stock price and its volatility during financial crises and the subsequent recovery. Thereafter, we develop properties to explain excess volatility, short-term underreaction, long-term overreaction, and their magnitude effects during financial crises and the subsequent recovery. We also explain why behavioral finance theory could be used to explain many of the asset pricing anomalies, but traditional asset pricing models cannot achieve this aim.  相似文献   
88.
本文以出口商预期利润最大化为视角,介绍和归纳了出口商计价货币选择的有关模型。得出结论:一国货币作为国际贸易发票货币取决于货币汇率的波动性;该国占据的出口市场份额以及该国出口产品的差异性程度,并利用经验数据检验了以上结论,展望了人民币国际化的前景。  相似文献   
89.
金融市场的变量虽然纷繁复杂,但价格因其直观性和重要性,成为金融市场参与者最易观察且难以忽略的变量,正因如此,价格对市场参与者的心理和行为产生了深刻影响.以中国股市2004年1月至2020年6月的数据为样本,探究价格因素会如何影响由追涨行为所导致的M AX效应.实证结果发现:投资者的追涨勇气和热情明显会受到价格影响,即当反应市场整体价格水平的股指指数近期上涨或波动率越小时,亦或当个股价格越低于其前期最高价、越低于投资者购买价时,投资者越乐于追涨具有\"高极端收益\"的个股,M AX效应也随之会更显著.  相似文献   
90.
近年来我国商品住宅价格变化的区域差异越来越大,使得宏观调控政策在各地区产生了不同效果。文章在比较东部、中部和西部地区历年商品住宅价格波动状况的基础上,根据住宅市场存量——流量理论构建我国商品住宅市场的价格决定模型,并以2003—2008年我国28个省市自治区的面板数据为样本,运用面板数据的混合模型进行实证研究,结果表明:各区域商品住宅平均销售价格及其波动幅度存在较大差异;利率、预期、银行信贷和滞后价格是导致我国商品住宅价格波动存在巨大区域差异的主要原因;我国各区域商品住宅价格的上涨缺乏经济基本面的支持。  相似文献   
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