人民币汇率与我国股价、房价的联动关系研究

近年来,我国人民币汇率形成机制、股票市场和房地产市场发生了巨大变化,人民币汇率和股价、房价之间的信息传导和波动关联备受瞩目。本文采用VAR-MGARCH-BEKK模型,分析了我国人民币汇率、股价和房价之间的联动关系。研究结果表明,从波动的溢出效应来看,人民币汇率的波动率、股票价格的增长率和房地产价格的增长率之间存在非常明显的波动溢出效应;从资产价格的水平影响来看,人民币汇率与股票价格、房地产价格等国内资产价格的水平相关性较弱,而股票价格对房地产价格的影响较明显,并就该结论提出了相关的理论解释和政策建议。     

国际金融市场与国际原油期货市场溢出效应实证检验——基于VAR-BEKK模型的分析

文章通过构建VAR模型和BEKK模型对道琼斯股票市场、美元/欧元汇率市场与国际原油期货市场的动态关系进行了实证检验。结果表明：道琼斯股票市场与WTI原油期货市场存在双向的价格溢出效应,以及前者向后者的单向波动溢出效应;美元/欧元汇率市场存在向WTI原油期货市场单向的价格溢出效应和波动溢出效应。所以,国际原油期货市场与国际金融市场联系紧密,国际原油的金融属性日益体现,其价格变动更多受外部国际金融市场风险影响。     

石油价格与股票市场的溢出效应——基于中美数据的比较分析

本文以中美股票市场和国际原油市场的数据为样本,用VAR模型和二元GARCH模型研究了中美股市价格和国际石油价格的收益率及波动的溢出效应。研究结果表明,中国股市价格和国际石油价格之间,既不存在任何方向的收益率溢出效应,也不存在任何方向的波动溢出效应;而国际石油价格的变化率对于美国股市收益率确有负向先导作用,并且两者之间具有双向的波动溢出。     

国际原油期货市场对碳金融市场溢出效应实证检验

本文通过构建VAR模型和二元GARCH模型对国际原油期货市场对碳金融市场的动态关系进行了实证检验,结果表明:碳金融市场与国际原油期货市场存在单向价格溢出效应,同时国际原油期货市场存在向碳金融市场的单向波动溢出效应。     

人民币汇率与股票市场间波动溢出效应的行业异质性

2015年"811汇改"完善了人民币兑美元汇率中间价报价机制,使得我国人民币汇率波动更加市场化.汇率的波动会直接影响到企业原材料价格、产成品价格、现金流情况以及股票市场投资者预期等,进而对股票收益率产生波动溢出效应,而且波动溢出效应因行业的不同而有所不同."811汇改"后,人民币汇率波动和股票市场行业收益率波动之间显著...     

全球大宗商品价格联动网络及其对我国物价的溢出影响研究

双循环背景下防范全球大宗商品价格波动所产生的风险传染和价格传导是维护国内物价稳定的重要环节。本文以国内外大宗商品为研究对象,采用基于广义方差分解的动态溢出指数方法来测度全球大宗商品对我国物价水平(CPI、PPI)的波动(收益)溢出效应。研究结果表明:国内外大宗商品之间均存在时变波动(收益)溢出效应,其主要受到外部波动(收益)的驱动;国内外大宗商品在波动溢出和收益溢出层面上对我国物价(CPI、PPI)产生冲击并形成差异化的连通网络。在波动溢出连通网络上,矿产现货会重点对PPI产生较大的价格波动风险溢入效应;在收益溢出连通网络上,金属期货会重点对PPI产生较大的价格传导效应;国际原油期货均处于全球大宗商品连通网络的中心地位,重点对我国CPI产生较大的正向溢出影响。不同时频下国内外大宗商品对我国物价的溢出效应具有趋同性和持久性。周期频率越长,大宗商品对物价的波动(收益)溢出效应越大。在治理通货膨胀方面,要根据我国CPI、PPI在宏观调控中的不同定位,继续实施稳健货币政策,推动供给侧结构性改革,打造强大的国内统一大市场,畅通国内国际双循环发展格局。     

我国汇市与股市之间的价格和波动溢出效应实证研究

为了考察我国汇市与股市之间的价格和波动溢出效应,本文利用"汇改后"人民币对美元的汇率与上证综指的日数据建立了多元向量自回归模型GARCH模型.研究发现,我国汇市与股市之间的价格溢出效应不明显,汇率波动率的ARCH效应不对股票市场产生显著的冲击,外汇市场波动的持久性会对股票市场产生显著的影响;股票收益率的ARCH效应不会对外汇市场产生明显的冲击,但股票收益率波动的持久性会显著影响汇率的变化率.     

我国债市和汇市溢出效应的实证研究——基于VAR-GARCH-BEKK模型

利用VAR-GARCH-BEKK模型,研究了我国债市和汇市之间的价格和波动溢出效应。实证研究表明,债市和汇市收益率都呈现高峰厚尾的非正态分布,波动聚集特征显著;债市和汇市存在单向溢出效应,仅汇市对债市有价格和波动溢出效应;债市和汇市收益率序列总体呈现负相关,相关性较弱,样本期内两市场动态相关系数具有显著的时变性。     

时频视角下国内外大宗商品市场价格波动对我国物价的溢出效应研究

当前,全球主要大宗商品价格持续上涨,已经对多国造成明显的输入型通胀压力。为揭示国内外大宗商品市场价格波动对我国物价水平的影响机制,采用基于广义方差分解的动态溢出指数方法来测度不同时频下期现货市场对我国物价水平（CPI、PPI）的波动（收益）溢出效应及其影响因素。研究结果表明：国内外商品期现货市场均存在时变波动（收益）溢出效应,其主要受到自身波动（收益）的影响;全球性重大危机加剧了全球大宗商品市场的总体波动（收益）溢出效应。国外商品期货市场对我国商品期现货市场存在明显的净溢出效应。国内商品期货市场在基于波动的连通网络中处于中心地位,会重点对PPI指数产生波动溢出影响。国外商品期货市场在基于收益的连通网络中处于中心地位,会重点对CPI指数、PPI指数产生收益溢出影响。国内外商品期现货市场对物价的溢出效应存在非对称性。不同时频下国内外商品期现货市场对物价的溢出效应存在显著差异。周期频率越长,各市场对物价的波动溢出效应越大,而收益溢出效应越小。在治理通货膨胀上,需要继续实施稳健的货币政策,重点放在抑制PPI过快上涨并向CPI传导上。     

我国股市行业间的收益与波动溢出效应研究——基于VAR模型构造溢出指数

已有的文献多是通过脉冲响应来刻画溢出效应,该方法得到的溢出效应不具有连续性,在实际应用中有一定的缺陷.而本文则是通过构建溢出指数的方法来衡量我国股市行业间的收益与波动的溢出效应,它能够从溢出指数走势特征中提取股市对信息的反应,可以辅助投资者预判市场走势,做好资产配置准备.研究发现我国股市行业间的收益与波动溢出指数的突变特征明显,收益溢出指数的突变点多是局部高点,而波动溢出指数的突变点多是局部低点.     

去伪存真:油价趋势与股票市场——来自“一带一路”35国的经验证据

油价波动深刻影响全球经济,严重时会造成全球股市动荡,甚至引发系统性金融风险。然而油价中的信息噪音严重阻碍国际油价对股票市场的预测效果。本文提出的移动平均法可有效减弱信息噪音,研究表明,本文基于移动平均法构建的油价趋势因子对“一带一路”沿线国家股票市场具有良好的样本内和样本外可预测性。进一步研究发现,国际油价波动对产油国和非产油国股票市场的影响存在非对称性。本文为国际油价冲击股票市场提供了新的有力证据,同时本文研究成果提示了油价风险,对维持我国股票市场稳定,保持金融稳定具有一定意义。     

利率与股价之间的价格溢出效应与波动溢出效应

基于具有外生变量的二元VAR-MGARCH模型对中国货币市场利率和股价之间的关联进行了理论分析和实证研究。结果表明,利率和股价之间基本不存在价格溢出效应;货币市场利率和股价序列均表现出时变方差的特征和波动的持久性特征,货币市场和股市之间存在双向波动溢出效应;货币供给的正向冲击对利率的影响是正向的。     

Volatility spillover in the foreign exchange market: the Indian experience

We find evidence of significant volatility co-movements and/or spillover from different financial markets to the forex market in India. Among a large number of variables examined, volatility spillovers from domestic stock, government securities, overnight index swap, Ted spread and international crude oil markets to the foreign exchange market are found to be significant. There is evidence of asymmetric reactions in the forex market volatility. Comparisons between pre-crisis and post-crisis volatility indicate that the reform measures and changes in financial markets microstructure during the crisis period had significant impact on volatility spillover. During the post-crisis period, the lagged volatility component that represents persistent or fundamental changes had significant spillover effect on forex volatility, rather than the temporary shocks component. There is evidence of a decline in the asymmetric response in the forex volatility during the post-crisis period in India.     

Asymmetric volatility spillover between oil-importing and oil-exporting countries' economic policy uncertainty and China's energy sector

While the relationship between economic policy uncertainty(EPU) and energy market is of great interest to economist, previous research dose not differentiate the effect from oil-importing countries to oil-exporting countries' EPU on the a country's energy sector. In this paper, we address this issue by testing the effect of importer and exporter's EPU on the largest oil-importing country, China, as oil-importing affected greatly by the economic policy. TVP-FAVAR model is applied to obtain the factors and time-varying coefficients of 21 countries' EPU monthly indexes and energy stock realized volatility. We find that the Chinese energy sector's stock volatility is positively related to EPU shocks and that bad volatility has a stronger impact than good volatility. Second, the volatility spillover from oil-exporting countries' EPU on the Chinese energy sector is stronger than that from oil-importing countries' EPU, with a stronger effect for bad volatility than for good volatility. Finally, The bad volatility spillover and spillover asymmetry is stronger during the crisis periods, such as the debt crisis, energy contention, oil price turbulence, or limited production agreement, both symmetric and asymmetric spillovers increase. Our findings have potentially important implications for the regulators and investors on Chinese oil market with different types of countries' EPU.     

Dynamic volatility spillovers across oil and natural gas futures markets based on a time-varying spillover method

This paper analyzes dynamic volatility spillovers between four major energy commodities (i.e., crude oil, gasoline, heating oil and natural gas) in the oil-natural gas future markets. We construct a time-varying spillover method by combining the TVP-VAR-SV model and the spillover method of Diebold and Yilmaz (2009, 2012, 2014). We use the spillover method to obtain time-varying total, directional and pairwise volatility spillover indices. Our results summarize as follows: (1) The volatility spillover indices present peaks and troughs during some periods, such as shale gas revolution, financial crisis, and oil price crash; (2) After the U.S. shale gas revolution, the size of volatility spillover from natural gas future market has reduced sharply, but volatility doesn't decouple from the other three oil future markets; (3) The directional spillover is asymmetric. The crude oil and heating oil futures market are main net transmitter of volatility risk information, while the gasoline and natural gas futures markets are the net receiver; (4) For natural gas future market, the pairwise volatility spillover from crude oil future market has the most significant influence.     

The impact of institutional analyst forecast divergence on crude oil market: Evidence from the mixed frequency models

As important information intermediaries, analysts play a non-negligible role in the crude oil market. Existing research often focuses on analysts' collection and interpretation of firm-specific information, but neglects the impact of analysts' forecasts on specific markets such as the crude oil market, which is crucial to the safe and stable development of the crude oil market. Therefore, this study uses historical data from January 2011 to December 2020 as a sample to construct analysts' forecast divergence indicators from 15 institutional analysts' forecast data on international crude oil futures prices. It then explores the impact of institutional analysts' forecast divergence on oil price return volatility, crude oil market jumps and crude oil futures trading volume, based on various mixed-frequency models. The results are as follows: First, volatility in oil price returns increases with a growing divergence in analysts' forecasts. Second, analysts' forecasts do not trigger jump in the crude oil market on the first six days after the information is released, but trigger a significant positive jump in the market on the seventh day. Third, the impact of analysts' forecast divergence on trading volume is weak; however, the reverse effect is significant, while the static and dynamic spillover results are consistent.     

Returns and volatilities of energy futures markets: Roles of speculative and hedging sentiments

This study examines how speculative and hedging sentiments influence the returns and volatilities of energy futures markets. We construct speculative and hedging sentiment indices based on the weekly data of fund and commercial positions of four energy futures: crude oil, heating oil, gasoline, and natural gas, traded on the New York Mercantile Exchange (NYMEX) from 15 January 2013 to 5 February 2019. Our study demonstrates that speculative sentiment generates greater market fluctuations in the energy futures markets than hedging sentiment; and, further, speculative sentiment stimulates a reversal effect on the returns of crude oil futures. Moreover, speculative sentiment exerts positive systemic risk compensation on the four futures' returns, whereas hedging sentiment alleviates volatilities in the energy futures markets. Most notably, distinguishing it from the leverage effect in stock markets, the speculative sentiment in the energy futures markets is influenced more by good than by bad news; while hedging sentiment exhibits emotional neutrality, as opposed to its impact on stock markets as reported in the literature. Additionally, the positive hedging sentiment in crude oil futures demonstrates significant systemic risk compensation, whereas the three other futures do not have an influence, confirming the prevalence of speculation in hedging transactions in crude oil futures. Our further analysis shows cross-market volatility spillover effects, among which speculative sentiment inherent in crude oil futures causes volatility spillovers to the three other futures, while hedging sentiment has no such effect. Our study has implications for overseeing international energy futures markets, providing regulators with evidence that will facilitate the development of effective strategies to strengthen market supervision.     

国际商品市场与股票市场的溢出效应——基于中美数据的VAR-MGARCH分析

基于VAR-MGARCH-BEKK模型,对国际商品市场与中美股票市场之间的均值与波动溢出效应进行了经验分析。结果表明,国际商品市场与中美股票市场之间存在着相互的均值溢出效应,国际商品市场对中美股票市场存在波动溢出效应,同时,美国股票市场对国际商品市场存在波动溢出效应;另外,中国应该尽快编制科学合理并适合自身国情的商品指数。