涨跌停板制度对ST股票收益波动的影响

在对涨跌停板制度下股票收益结构进行分析的基础上，本文提出采用审查GARCH模型来描述受涨跌停板影响的股票收益序列波动特性，在模型中引入虚拟变量反映涨跌停板对收益序列波动的影响，并采用网格Gibbs抽样方法对模型进行估计。最后，以沪深两市的ST股票进行实证分析。结果表明，涨跌停板制度对ST股票的收益波动具有明显的影响。     

涨跌停板制度对期货市场价格发现过程及波动性的影响--基于上海期货交易所的实证研究

本文通过检验在出现涨跌停板之后一个交易日的期货价格及其波动性的变化情况，研究了涨跌停板制度对上海期货交易所期货价格变动的影响。研究结果显示，对不同的期货品种，涨跌停板制度的影响存在一定的差异，但总体而言，涨跌停板制度并没有起到防范价格过度反应和降低市场波动性的作用。相反，在一定程度上延缓了期货市场价格发现功能的发挥，增大了市场的波动性。     

涨跌停板制度对我国期货市场流动性影响的实证研究

一、引言涨跌停板是当前很多国家都采用的价格稳定机制。实行涨跌停板制度的目的,在于通过利用人工干预的方法,减缓市场价格波动的剧烈程度,尤其在投机过度和交易过热的市况下,适时实施涨跌停板中断交易,     

沪深股票市场风险变异性实证研究

股票市场是信息和资本快速流动的一个要素市场、信息、资本的快速流动使得股票市场价格频繁变化，从而导致股票市场波动。本文拟对沪深股票市场的波动特征及风险变异性进行实证研究，同时分析涨跌停板交易制度对两个市场波动的影响。     

技术交易规则预测能力与收益率动态过程——基于Bootstrap方法的实证研究

本文对我国股票市场技术交易规则预测能力进行了实证检验,发现移动平均规则所产生的买入区间收益率更大而波动率却更小,卖出区间的收益率为负而波动率却更大。运用自举(Bootstrap)方法检验发现,四种常用的收益率线性模型均不能解释买卖出区间收益率与波动率所表现出的非对称现象,尤其无法解释卖出区间收益率为负的现象。为此,本文通过人工神经网络方法,将条件异方差结构引入到现有的收益率非线性模型,发现该模型能更好地解释买卖出区间收益率与波动率模式,表明收益率动态过程中存在非线性特征。     

恒生指数、B股指数和A股指数过度反应后短期行为分析

本文通过平均收益率计算方法 ,系统地比较了恒生指数、B股指数和A股指数的短期过度反应行为及其后的累积超额收益率变化特征。本文的研究认为 :由于国内股市涨跌停板制度的实施 ,其波动程度已经小于香港股市。国内A、B股市场在发生正向激烈变化后 ,次日往往存在惯性上冲 ,但在第 2到第 3天存在过度反应现象 ;第 5天到第 10天存在明显的反抽 ,即与事件日方向相同的变化。国内股市在发生大幅下跌之后 ,无论哪个市场都有惯性的下跌动量存在 ,A、B股市场的异常波动存在一定程度的“隔年现象”。本文进一步的回归模拟发现 ,在上涨期间 ,香港股市发生异常波动后的第 1天、第 5天和第 10天的累积超额收益率和异常波动的幅度相关 ,B股和A股市场的第 1天和第 5天的累积超额收益率和异常波动幅度相关。而在下跌过程中 ,三个市场都无一例外的和异常波动的幅度强相关     

我国证券市场股价运动非线性特征检验

文章首先运用ARMA模型对市场收益率序列和波动率序列去掉序列的线性相关,然后运用BDS检验法对我国证券市场的收益率序列和波动率序列是否具有非线性结构进行实证研究。检验结果发现:我国证券市场股价运动具有明显的非线性特征,拒绝了有效市场理论的基本假设。     

股价被捆绑以后——试析涨跌幅限制对股市运行的影响

1996年12月16日起,沪、深两市开始实行股价涨跌幅限制的交易规则,股票市场的运行模式发生了明显的变化,本文试从股票技术分析的角度分析、说明新规则下股市运行的新特征。一、股价上行加速、下行减速目前股价的涨跌幅限制为每天10％,不难看出,从同一价位出发,经过n个涨停板或跌停板后,上涨的幅度为[(1+10％)~n-1]×100％,下跌的幅度为[(1-10％)~n-1]×100％。若经过2个涨停板或跌停板,上涨或下跌的幅度分别为21％和19％;若经过5个涨停板或跌停板,则上涨或下跌的幅度分别为61％和41％。可见,由于在股价上行过程中基数不断扩大,股价的上涨被加速;     

浅议我国证券市场涨跌停板制度的逐步放开

涨跌停板制度是我国证券市场主要的稳定措施之一,但随着我国股市的日益规范和成熟,涨跌幅已经渐渐失去了其原先的价值,应逐步放开。本文先介绍了我国股市涨跌停板制度的发展,然后分析了该制度对我国股市的影响,最后提出了一些政策性建议。     

股市波动对利率期限结构长短期冲击分析

本文选取了2004-2008年的中国国债数据，在Nelson-Siegel模型的基础上，引入股市收益率，股市波动率以及GDP对水平因子、斜率因子以及曲率因子进行时间跨度由长到短的时间序列分析。分析结果表明宏观因素没有明显相关性。利用工具变量法,发现短期内曲率因子的波动可以被三因子的滞后以及股市波动良好解释，股市收益率对水平因子有着显著冲击，股市波动率对水平因子短期有着显著负影响，而长期影响为正。     

Volatility of exchange rate futures and high-low price spreads

This study explores the time-series behavior and the predictability of daily percentage changes in the Japanese Yen futures contracts. The relationship between currency futures volatility and high-low price spreads in the Japanese Yen futures contracts is examined. In addition, this study explores the issue of first- and second-order dependencies in the Japanese Yen futures contract prices changes, address the issue of asymmetric volatility, and examine the extent to which the information contained in the high-low price spreads can be used to predict future Japanese Yen currency futures contract price changes. The analysis is carried out using the EGARCH model. The volatility of the Japanese Yen currency futures price changes is adequately modeled by an EGARCH process and is predictable using information contained in the high-low price spread variables constructed in this study. This study also finds a positive and significant relationship between the spread variable and the conditional mean of price changes, suggesting that current information contained in the spread variable can be used to predict future Japanese Yen currency futures contract price changes. The hypothesis that volatility is an asymmetric function of past innovations is confirmed.     

成交量、持仓量对我国大豆类期货价差波动影响的实证分析

采用GARCH(1,1)模型就成交量、持仓量对大豆类期货价差波动率的影响进行实证分析,结果显示：当期成交量、持仓量对大豆期货价差波动的整体影响是显著的;滞后成交量、持仓量对大豆期货价差波动的整体影响也是显著的;当成交量、持仓量同时进入条件方差方程时,它们对大豆类期货价差波动的影响整体上也是显著的。这一结论揭示了我国大豆期货市场信息传递过程,验证了我国大豆期货市场的信息非有效性,对期货市场投资者以及期货市场监管者具有一定的借鉴意义。     

Index futures trading and stock price volatility: Evidence from Denmark and France

This study uses an EGARCH methodology to investigate the impact of index futures trading on the price volatility of two European stock markets. The results show that index futures trading has changed the distribution of stock returns in Denmark and France, however, it has not increased stock price volatility. There is evidence that futures trading has dampened stock price fluctuations in France. The results further show that stocks in Denmark and France exhibit strong volatility persistence and asymmetry, especially during the post-futures period.     

铝期货市场的信息传递及其定价能力的比较研究——基于上海与伦敦铝期货市场的实证检验

借助现代计量经济分析方法,对上海期货交易所和伦敦金属交易所铝期货价格之间的联系以及两个市场在价格发现中的贡献份额进行了实证研究。研究结果表明:两个市场铝期货价格之间存在协整关系,期货价格之间相互影响、相互作用,一个市场的价格信息将对另外一个相关市场的价格波动产生影响;伦敦期铝市场在国际定价中处于主导地位,上海市场的定价能力次之。     

Availability and settlement of individual stock futures and options expiration-day effects: evidence from high-frequency data

This study examines whether the expiration-day effects of stock options traded in Australian Stock Exchange on return, volatility, trading volume, and temporary price changes of individual stocks vary with the availability and the settlement method of individual stock futures contracts. Using transaction data of the stocks that have both options and futures contacts from 1993 to 1997, we find that options expiration has significant effects on return and volatility of the underlying stocks in absence of individual stock futures. After introduction of a cash-settled stock futures contract, the effects decrease notably. However, the switch of a futures contract from cash settlement to physical delivery promotes the expiration effects on return and volatility and boosts temporary price changes on expiration days. Finally, options expiration has little effect on trading volume. Trading activity tends to behave normally regardless whether stock futures contracts are available or not.     

Testing the stabilization hypothesis in the UK short-term interest rates: Evidence from a GARCH-X model

The objective of this paper is to examine the validity of one of the recurring arguments made against futures markets that they give rise to price instability. The paper concentrates on the impact of futures trading on the spot market volatility of short-term interest rates. The analytical framework employed is based on a new statistical approach aiming to reconcile the traditional models of short-term interest rates and the conditional volatility processes. More specifically, this class of models aims to capture the dynamics of short-term interest rate volatility by allowing volatility to depend on both scale effects and information shocks. Using a GARCH-X and asymmetric GARCH-X model four main conclusions emerge from the present study. First, the empirical results suggest that there is an indisputable change in the nature of volatility with evidence of mean reversion after the onset of futures trading. Second, the information flow into the market has improved as a result of futures trading. Third, a stabilization effect has been detected running from the futures market to the cash market by lowering volatility levels and decreasing the risk in the spot market. Finally, trying to capture the leverage effect the findings suggest that positive shocks have a greater impact on volatility than negative shocks.     

The role of oil futures intraday information on predicting US stock market volatility

This study investigates the role of oil futures price information on forecasting the US stock market volatility using the HAR framework. In-sample results indicate that oil futures intraday information is helpful to increase the predictability. Moreover, compared to the benchmark model, the proposed models improve their predictive ability with the help of oil futures realized volatility. In particular, the multivariate HAR model outperforms the univariate model. Accordingly, considering the contemporaneous connection is useful to predict the US stock market volatility. Furthermore, these findings are consistent across a variety of robust checks.     

The asymmetric effects of U.S. large-scale asset purchases on the volatility of the Canadian dollar futures market

This paper investigates the asymmetric effects of U.S. large-scale asset purchases on the volatility of the Canadian dollar futures market. This approach is innovative in so far as it examines the effects of allowing two-round impacts to differ in our settings of dynamic volatility with time-varying jump intensity because the world economic situation differs during periods of large-scale asset purchases. Utilizing the daily futures price of the exchange rate for the Canadian dollar against the U.S. dollar, the empirical findings show that U.S. large-scale asset purchases have significant asymmetric effects on the volatility of the Canadian dollar futures market. Two kinds of asymmetry are observed. Firstly, the impact of large-scale asset purchases is smaller in the first round of the large-scale asset purchases than in the second round. Secondly, an expansionary policy causes higher volatility in the Canadian dollar futures market than does a contractionary policy due to a signal of high liquidity.     

基于Morlet小波时频互相关的股指期货价格发现效率研究

本文采用Morlet小波时频互相关分析方法,从"时域"和"频域"两个维度检验了我国以及国际主要市场股指期货和现货价格序列的动态关联性,研究了股指期货价格发现效率的问题。研究表明,沪深300指数和股指期货在低频长周期范围内,呈现长时间高度相关、协同波动的特征;在高频短周期范围内,两者整体仍然具有协同波动特征,但时常出现短暂紊乱的情况,即期货与现货的交错引导现象。我国股指期货市场的价格发现效率较美国、英国成熟市场仍有较大差距,但强于日本。