Horse race of weekly idiosyncratic momentum strategies with respect to various risk metrics: Evidence from the Chinese stock market

This paper focuses on the horse race of weekly idiosyncratic momentum (IMOM) with respect to various idiosyncratic risk metrics. Using the A-share individual stocks in the Chinese market from January 1997 to December 2017, we first evaluate the performance of the weekly momentum based on raw returns and idiosyncratic returns, respectively. After that the univariate portfolio analysis is conducted to investigate the return predictability with respect to various idiosyncratic risk metrics. Further, we perform a comparative study on the performance of the IMOM portfolios with respect to various risk metrics. At last, we explore the possible explanations to IMOM as well as risk-based IMOM portfolios. We find that 1) there are prevailing contrarian effect and IMOM effect for the whole sample; 2) the negative relations exist between most of the idiosyncratic risk metrics and the cross-sectional stock returns, and better performance is linked to idiosyncratic volatility (IVol) and maximum drawdowns (IMDs); 3) additionally, the IVol-based and IMD-based IMOM portfolios exhibit better explanatory power to the IMOM portfolios with respect to other risk metrics; 4) finally, higher profitability of IMOM as well as IVol-based and IMD-based IMOM portfolios is found to be related to upside market states, high levels of liquidity and high levels of investor sentiment.     

Forecasting the volatility of asset returns: The informational gains from option prices

A new class of forecasting models is proposed that extends the realized GARCH class of models through the inclusion of option prices to forecast the variance of asset returns. The VIX is used to approximate option prices, resulting in a set of cross-equation restrictions on the model’s parameters. The full model is characterized by a nonlinear system of three equations containing asset returns, the realized variance, and the VIX, with estimation of the parameters based on maximum likelihood methods. The forecasting properties of the new class of forecasting models, as well as a number of special cases, are investigated and applied to forecasting the daily S&P500 index realized variance using intra-day and daily data from September 2001 to November 2017. The forecasting results provide strong support for including the realized variance and the VIX to improve variance forecasts, with linear conditional variance models performing well for short-term one-day-ahead forecasts, whereas log-linear conditional variance models tend to perform better for intermediate five-day-ahead forecasts.     

阿里巴巴并购饿了么的动因和财务风险分析

在经济全球化的背景下,为扩大企业经营规模,并购成为企业很好的选择。论文以阿里巴巴收购饿了么为例,研究阿里巴巴收购饿了么的动因,分析并购为阿里巴巴这个典型的互联网企业带来的财务风险,并为互联网企业的并购提供宝贵的建议。     

SMW围护结构施工技术

文章结合天津地铁1号线二纬路站SMW围护结构的施工,介绍了其施工工艺、方法及为保证其止水效果所采取的技术措施。     

Is bitcoin a safe haven or a hedging asset? Evidence from China

Based on daily data about Bitcoin and six other major financial assets (stocks, commodity futures (commodities), gold, foreign exchange (FX), monetary assets, and bonds) in China from 2013 to 2017, we use a VAR-GARCH-BEKK model to investigate mean and volatility spillover effects between Bitcoin and other major assets and explore whether Bitcoin can be used either as a hedging asset or a safe haven. Our empirical results show that (i) only the monetary market, i.e., the Shanghai Interbank Offered Rate (SHIIBOR) has a mean spillover effect on Bitcoin and (ii) gold, monetary, and bond markets have volatility spillover effects on Bitcoin, while Bitcoin has a volatility spillover effect only on the gold market. We further find that Bitcoin can be hedged against stocks, bonds and SHIBOR and is a safe haven when extreme price changes occur in the monetary market. Our findings provide useful information for investors and portfolio risk managers who have invested or hedged with Bitcoin.     

组合式房产税改革的宏观经济效应 ——兼顾居民用房与商业用房的DSGE框架分析

本文通过构建包含房产税的动态随机一般均衡（DSGE）框架,兼顾居民用房与商业用房,模拟分析房产税改革对主要宏观经济变量的影响。研究结果表明：（1）提高居民用房房产税税率对总消费、投资、房价和总产出等变量的均衡值和波动均以负面影响为主,但会降低社会福利损失;（2）降低商业用房房产税税率对总消费、投资、房价和总产出等变量的均衡值和波动均以正面影响为主,但会提高社会福利损失;（3）提高居民用房房产税税率与降低商业用房房产税税率同时实施时,不仅能够对冲居民用房房产税改革对宏观经济的负面影响,尤其是能够有效对冲改革对投资和总产出的负面影响,还会降低社会福利损失。因此,中国下一步试点改革应当重点关注组合式改革方案。     

AN APPLICATION OF AN INTEGRATED TRANSPORT NETWORK – MULTIREGIONAL CGE MODEL TO THE CALIBRATION OF SYNERGY EFFECTS OF HIGHWAY INVESTMENTS

A transportation network-multiregional CGE model is applied to estimate the synergy effects of a set of highway projects on value added by region and industrial sector. This synergy effect is defined as a difference between the summation of the net GDP increase from the development of each highway sub-link without spatial linkage and the change in GDP resulting from the concurrent development of all links with spatial linkages. Among nine east–west highways in Korea, the East–West 9 highway increases the GDP by 0.3% over the 30-year time period horizon, with 0.016% of the GDP due to the synergy effect. The East–West 9 highway has the largest synergy effect of US$0.164 billion per year on the manufacturing sector of Kwangju Metropolitan Area, resulting in a gain in a regional GRP per capita of US$15.88 per year. Since most synergy effects are generated in less developed regions, highway development can contribute to the reduction in regional disparities.     

施工合同管理问题及处理研究

施工合同是发包人支付工程款,承包人进行建设的合同。施工合同管理,即合同的订立、履行、变更、索赔和纠纷解决等。在经济全球化和科技高速发展的背景下,合同管理不仅是一个简化的签字盖章问题,它与工程项目"质量、进度、造价、安全"四大控制目标同等重要,是工程项目管理的重要内容。因此,从理论和实际出发,都急切对这一问题进行深入的研究解决,从而建立与清单计价相适应的《施工合同示范文本》,加强清单计价下施工过程合同管理,提高工程项目管理的水平。     

《航材供应》网络课程建设与应用探析

军队院校网络教学应用系统是一个构建网络课程的平台。以《航材供应》网络课程为例介绍了网络课程的建设方法,对应用效果进行了分析。     

两阶段供应链的价格牛鞭效应模型

在一个简单如两阶段的供应链中,如果需求者采用＂涨增跌减＂的行为模式,而供给者不采取适当的应对措施,则短期的需求变动可能造成未来较长时期的价格的持续上升和下跌,即价格的牛鞭效应。通过构建一模型,对这一现象作出合理解释,并基于该模型提出有效的价格牛鞭效应的控制措施。