Causality and volatility patterns between gold prices and exchange rates

This paper provides a new perspective on the link between gold prices and exchange rates. Based on gold prices denominated in five different currencies and the related bilateral exchange rates, we put causalities and short-run volatility transmission under closer scrutiny. We provide evidence that the identification of a strong hedge function of gold requires an explicit modeling of the volatility component. For all currencies, exchange rate depreciations initially have a negative impact on the gold price after one day which turns out to be positive after two days in most of the cases. Contrary to previous studies, our results point to a specific role of the dollar in the context of gold-exchange rate relationships: volatility of dollar exchange rates more frequently results in strong hedging functions of gold prices. Furthermore, the gold price denominated in the US dollar tends to increase after a depreciation of the dollar.     

Press freedom and jumps in stock prices

Press freedom varies substantially across countries. In a free environment, any news immediately becomes public knowledge through mediums including various electronic media and published materials. However, in an unfree environment, (economic) agents would have more discretionary powers to disclose good news immediately, while hiding bad news or releasing bad news slowly. We argue that this discretion affects stock prices and that stock markets in countries with a free press should be better processors of economic information. Using an equilibrium asset-pricing model in an economy under jump diffusion, we decompose the moments of the returns of international stock markets into a diffusive risk and a jump risk part. Using stock market data for a balanced panel of 50 countries, our results suggest that in countries with a free press, the better processing of bad news leads to more frequent negative jumps in stock prices. As a result, stock markets in those countries are characterized by higher volatility, driven by higher jump risk and more negative return asymmetry. The results are robust to the inclusion of various controls for governance and other country- or market-specific characteristics. We interpret these as good stock market characteristics because a free press improves welfare and increases economic growth.     

一种新的利用网络爬虫技术的土地价格指数编制方法

研究目标：目前有关中国土地价格指数的研究没有考虑不可观测特征的影响,本文给出一种可以控制不可观测特征的土地价格指数编制方法。[HTH]研究方法：通过结合传统的特征价格模型和重复交易模型,提出固定地理单元并利用组内差分以控制地块不可观测特征,提出了一种新的土地价格指数编制方法。[HTH]研究发现：[HTF][STBZ][WTBZ]以上海为例讨论了分类土地价格指数,研究发现从2008~2015年,上海同质住宅用地价格上升了359.92%,同质工业用地和商服用地价格的涨幅分别为101%和107%。[HTH]研究创新：利用网络爬虫技术收集微观土地交易数据,为指数的编制提供了数据基础。[HTH]研究价值：该方法能够捕捉地块所在的特殊位置对于其价格的影响。     

创业板上市公司经济绩效及影响因素

研究目标：探讨创业板上市公司经济绩效的影响因素。研究方法：基于2012~2014年创业板上市公司的面板数据,运用贝叶斯模型平均法进行实证分析。研究发现：当期及滞后一期R&D强度对经济绩效存在显著负向影响,而R&D交互作用对经济绩效具有显著正向影响;经营现金流状况、总资产周转率对经济绩效具有显著正向影响;当期广告强度只对权益报酬率具有较显著正向影响。研究创新：第一,选择商品经营、资产经营与资本经营等三个方面的经济绩效指标,分别从R&D创新、广告营销、营运管理等方面探讨经济绩效的影响因素,拓展了研究视角;第二,运用贝叶斯模型平均法研究经济绩效的影响因素,估计结果更加稳健可信,具有方法的新颖性和有效性。研究价值：本文结论对改善创业板公司的创新和经营策略具有较强的现实意义。     

Stock liquidity and stock prices crash-risk: Evidence from India

In this paper, we examine the role of stock liquidity as a governance mechanism to discipline managers for withholding bad news (stock price crash-risk). This topic is useful to emerging markets because the dominance of controlling owners limits the monitoring of internal governance. Stock liquidity can be altered by the financial market regulations, thereby improving firm-level governance. In empirical analysis, we show that stock liquidity decreases stock price crash-risk. We identify two possible mechanisms through which stock liquidity reduces stock price crash-risk: the threat of intervention and price informativeness.     

Unconventional monetary policy and the stock market’s reaction to Federal Reserve policy actions

We examine the change in the effect of Federal Reserve’s policy actions on stock returns after the Fed started to use unconventional policy actions. We find that the response of stock returns to monetary policy actions are almost seven times higher after the federal funds rate hit the zero lower bound. We conduct additional analysis to examine the underlying causes of the increase in the impact of monetary policy actions of stock returns. We show that investors rebalance their portfolios towards equity after selling Treasury securities to the Federal Reserve during large scale asset purchases.     

Do terror attacks affect the dollar-pound exchange rate? A nonparametric causality-in-quantiles analysis

While much significant research has been done to study the effects of terror attacks on stock markets, less is known about the response of exchange rates to terror attacks. We suggest a non-parametric causality-in-quantiles test to study whether (relative) terror attacks affect exchange-rate returns and volatility. Using data on the dollar-pound exchange rate to illustrate the test, we show that terror attacks mainly affect the lower and upper quantiles of the conditional distribution of exchange-rate returns, while misspecified (due to nonlinearity and structural breaks) linear Granger causality test show no evidence of predictability. Terror attacks also affect almost all quantiles of the conditional distribution of exchange-rate volatility (except the extreme upper-end), with the significance of the effect being particularly strong for the lower quantiles. The importance of terror attacks is shown to hold also under an alternative measure of volatility and for an important emerging-market exchange rate as well.     

股指期货的套期保值问题

中国金融市场即将推出股票指数期货。本文吸收和借鉴了国外的研究成果,对股指期货的套期保值问题进行了系统研究,采用方差法和β系数法对风险最小化的套期保值比率进行了充分论证,并结合案例进行了模拟计算。本文根据资本资产定价模型,建立了一元线性回归方程,对流行的β系数法进行了检验和重要修正,对套期保值实践具有重要的指导意义。     

基于不完全信息动态博弈模型的报价策略研究

目前应用博弈论对价格谈判所进行的研究大多集中于讨价还价问题,而关于报价问题的研究往往依靠定性分析。因此本文建立了一个关于报价策略的三阶段不完全信息动态博弈模型,并通过求解证明：在谈判双方信息对称的条件下,无论对买方还是卖方来说,“抢先报价”都是占优策略。在买卖双方都采取“抢先报价”策略时,报价顺序博弈的结果具有不确定性。在现实中买卖双方往往会通过各种其他手段来达到抢先报价的目的。     

Disclosure quality,price efficiency,and expected returns

Using a composite disclosure quality measure, we examine the effect of disclosure quality on price delay and the effect of price delay determined by disclosure quality on expected returns in the Taiwan stock market. We find that higher disclosure quality can reduce stock price delay through more investor attention and higher stock liquidity after we control for accounting quality variables and consider the endogeneity issue. Furthermore, we show that disclosure quality reduces expected stock returns through the price efficiency channel associated with both investor attention and stock liquidity. Our results indicate that increasing a firm’s standardized information rating by one standard deviation can reduce its expected stock return by 0.63% annually. Taken together, our evidence suggests that regulatory activities enforced to improve public firms’ disclosure quality in the Taiwan stock market can make the stock market more efficient and therefore lower investors’ required return for stocks.