投资者情绪对我国股市行业收益率的动态影响作用——基于固定效应广义最小二乘法的研究

本文使用2005--2011年我国股市行业收益率数据并构造投资者情绪指标,利用VAR格兰杰因果检验和固定效应广义最小二乘法分析投资者情绪对我国股市的动态影响。实证结果发现,2005--2011年的两次股票市场大幅度涨跌中,我国投资者情绪和股票收益率存在双向因果关系;投资者情绪在3个月内会对股票收益率有正面的影响,此后12个月内其正向影响作用出现了明显的负向反转,其中具有较高账面市值比和占有较高经济地位的交通运输业、信息技术业和制造业等国家基础行业容易受到投资者乐观情绪的影响而出现大幅度涨跌。     

投资者情绪与股票超额收益率的联动分析——基于MS-VAR模型

本文首先构建投资者情绪指数，然后基于马尔可夫区制转换向量自回归模型对股票市场2005年1月至2022年2月期间进行区制识别，最后进行脉冲响应分析不同区制下投资者情绪与股票超额收益率两者之间的联动关系。实证结果表明：运用马尔可夫区制转换模型可以将我国股票市场划分为三个区制：迅速下跌期、低位徘徊期以及快速上涨期；三区制状态下，投资者情绪对股票超额收益率的正向冲击均产生显著的正向效应，股票超额收益率对投资者情绪的正向冲击均产生负向效应；股票市场处于低位徘徊状态时，投资者情绪对股票超额收益率冲击的响应程度最小；股票市场处于快速上涨状态时，股票超额收益率对投资者情绪冲击的响应程度最大。     

投资者情绪与股票收益的实证研究——基于扩展卡尔曼滤波的方法

本文运用扩展卡尔曼滤波的方法估计出投资者情绪指数,将上证综指收益率与理性情绪指数和非理性情绪指数进行广义脉冲响应函数分析。得出理性情绪与非理性情绪都在第2个月对上证综指收益率具有最大的正向冲击;收益率对理性情绪的正面影响具有较长的持续效应,对非理性情绪的正面冲击逐渐减小。     

融资融券视阈下的投资者情绪与A股收益率波动研究

本文以融资融券市场作为研究目标分析投资者的获利倾向、心理状态、行为决策等因素所反映出的投资者情绪特征对A股收益率波动的影响。采用CR I T I C赋权法,通过计算融资融券中融资余额、融券余额、融资融券交易占比以及融资买入量等多个数据指标构建融资融券投资者情绪指数CRISI。结合A股市场日交易数据,分析研究了融资融券市场中投资者情绪指数和股市收益率波动的相互作用。本文实证结果表明,融资融券投资者情绪指数对A股市场收益率存在正向作用,而A股市场收益率对投资者情绪的影响并不显著。此外,A股市场中股价的“异常涨跌”亦对投资者情绪影响不明显。实证结果反映出我国融资融券市场中投资者情绪与A股市场收益率之间存在一种单向的影响关系,为我国股票市场投资者情绪调查机制与监控系统的建立和完善提供了依据。     

中国股市情绪与农期指数的风险传染和溢出测度

为测度中国股市投资者情绪对农期指数的风险传染与溢出效应,采用一个基于Markov转换的混合Clayton copula模型进行实证分析,结果显示：（1）中国股市投资者情绪指数与连豆、豆粕、郑棉、玉米、豆油、郑糖、菜油、棕榈的期货价格指数之间存在Markov转换的两种相关结构状态,在主要状态下呈现弱时变正相关关系;（2）中国股市投资者情绪对上述8种农产品期货价格指数有显著的正向风险溢出效应,并且这些风险溢出效应具有显著的非对称性。这些结果有助于理解中国股市投资者情绪和农期指数之间的风险传染机制,并能够为国家政策以及投资者投资决策的制定提供重要参考。     

美国不确定性冲击对全球股市波动的影响研究

选取2000—2021年美国经济、金融、经济政策和地缘风险四类不确定性指数以及全球GDP排行前15国家股市收益率数据,基于多维不确定性冲击框架,运用单因子、双因子和多因子混频波动率GARCH-MIDAS模型,从样本内拟合与样本外预测两个方面实证考察美国不确定性冲击对全球主要国家股市波动的差异化影响。研究表明：美国经济不确定性和金融不确定性对多数国家股市长期波动均有正向推动作用,其中,美国金融不确定性的影响最为广泛;美国金融不确定性是影响中国股市长期波动的主要因素,且中美贸易摩擦主要通过美国金融不确定性传导;美国经济政策不确定性上升会增加俄罗斯和墨西哥股市长期波动,美国地缘风险对意大利股市长期波动存在显著正向影响。     

中美贸易摩擦对国际贸易板块的冲击--基于事件研究法

中美建交40周年以来,中美经贸关系既有合作又有摩擦。自2018年3月美国向中国部分商品加征关税,中美贸易战正式打响,中美贸易摩擦持续升级,导致国际贸易板块剧烈波动,引发投资者恐慌情绪。本文基于事件研究法,分析"正面"和"负面"中美贸易摩擦新闻事件分别对国际贸易板块的影响,首先通过对"窗口期"平均异常收益率进行分析,为投资者分别提供在中美贸易新闻"正面""负面"事件冲击下利用股市"T+1"交易机制对国际贸易板块进行投资时获利的最佳投资点;其次通过对"窗口期"累计异常收益率的分析,为投资者分别提供在中美贸易"正面""负面"两种新闻事件冲击下对国际贸易板块进行投资的最佳区间,最大化其超额收益。为投资者在中美贸易摩擦时期对国际贸易板块进行投资时,合理的规避风险、最大化其超额收益,同时提升投资者在负面新闻事件发出时的情绪,减少国际贸易公司市值的进一步缩水。     

投资者情绪与股票收益率变化——基于沪深300指数

投资者情绪对于活跃股票市场具有积极作用,同时也影响着股票市场的收益率。以沪深300指数为主要研究对象,选取2013～2022年日度数据,通过构建日度投资者情绪指数,研究其对股票收益率的影响。研究发现：第一,中国股票市场的投资者情绪可以显著提升股票的收益率;第二,在短期内,这种正向作用会加强,但在中长期,投资者的情绪对股票收益的影响将逐渐减弱,甚至出现反转现象,并且在利用替换变量、调整样本期、控制宏观经济变量之后结果依然稳健。此项研究有助于理解股市中情绪效应的特征及机理,为构建更为符合中国股民的投资者情绪指数提供一个新的视角。     

中国股市个体投资者羊群行为影响因素分析

中国股市投资者表现出显著的羊群行为,心理因素是投资者羊群行为产生的主要原因,情绪、股票历史收益率和股票规模等也是影响投资者行为的重要因素。本文利用我国股市个体投资者交易数据,对影响投资者羊群行为的因素进行了实证研究,探讨了我国股市个体投资者羊群行为的特征。     

投资者情绪、企业投资行为与资源配置效率

基于中国资本市场的经验数据,文章实证研究了投资者情绪对企业投资行为影响的经济后果。结果发现,投资者情绪与企业过度投资显著正相关,而与投资不足呈显著的负相关关系;投资者情绪的冲击对企业当前和未来绩效的影响表现为"正向影响——负向影响——逐渐消退"的过程。这意味着,在中国资本市场中,投资者情绪对资源配置效率具有"恶化效应"与"校正效应"的两面性,而其"总体效应"表现为资源配置效率的降低。上述研究发现对于深入理解投资者情绪影响对企业投资行为所产生的经济后果具有重要意义,也有助于我们从微观企业的视角反思金融危机对实体经济的影响。     

Debt and Taxes and Uncertainty

With a graduated personal tax schedule, Miller showed that there could be an equilibrium debt supply for the corporate sector as a whole. In the presence of uncertainty there is also a unique debt/equity ratio for each individual firm, and this ratio is related to the firm's operational risk characteristics. However, if firms merge and spin off in response to tax incentives, the identity of firms is ambiguous and only the corporate sector is a meaningful construct. These arguments are developed in both discrete and continuous models that employ extensions of the arbitrage-free pricing theory.     

教育与资本怎样的前景怎样的现实

来自政府的声音: "动员各种社会资源,发展教育" 此次论坛上财政部长助理张少春的发言是最受关注的发言之一.他的演讲传达出的信息有这样几方面:第一,谈到现实,他认为全社会对教育的巨大需求与我国公共投入不足已成为我国教育事业发展的突出矛盾.近年来,以公共部门投入为主,多渠道筹措教育经费的教育投入机制成为解决这一问题的重要途径,也使得公共部门与私营部门在教育领域的合作日益密切.第二,谈到前景,他认为,1.中国经济持续、快速的增长对高技能人才产生巨大的需求,这为私营部门的参与提供了广阔空间.2.随着公共财政职能的不断完善,财政资金将在各项教育事业中重新进行分配,进一步优化财政支出结构,提高资金的使用效率.在"十一五"期间,我国将把公共支出的重点转移到农村.我们将逐步把全体农村适龄儿童的义务教育全部纳入公共财政体制.     

Director gender and mergers and acquisitions

Does director gender influence CEO empire building? Does it affect the bid premium paid for target firms? Less overconfident female directors less overestimate merger gains. As a result, firms with female directors are less likely to make acquisitions and if they do, pay lower bid premia. Using acquisition bids by S&P 1500 companies during 1997–2009 we find that each additional female director is associated with 7.6% fewer bids, and each additional female director on a bidder board reduces the bid premium paid by 15.4%. Our findings support the notion that female directors help create shareholder value through their influence on acquisition decisions. We also discuss other possible interpretations of our findings.     

Political corruption and mergers and acquisitions

This research examines the relation between political corruption and mergers and acquisitions (M&As). We find that local corruption increases firm acquisitiveness but decreases firm targetiveness. The levels of corruption in acquirer areas relate positively to the bid premiums and negatively to the likelihood of deal completion. Corruption motivates acquiring firms to use excess cash for payment, which mitigates the negative effect of corruption on acquirer shareholder value. The evidence indicates that acquisitions help acquiring firms convert cash into hard-to-extract assets and relocate assets from the high to low corruption areas, thereby shielding their liquid assets from expropriation by local officials.     

East and west and north and south : A preliminary model

The Brandt report and other proposals for a new North-South world order continue to be the focus of lively debate, yet it is often argued that little concrete has emerged from their recommendations. A major reason for this, the author argues, is that the East-West conflict component is not sufficiently taken into consideration-East-West tensions are a severe constraint on and a determining factor of North-South relations. Using influence diagrams, the author develops a flexible framework for discussion and assessment of N/S-E/W relations.     

Trust and cross-border mergers and acquisitions

A number of studies suggest that social trust matters for investment. Using different measures of trust from World Values Survey, we show that countries where people display higher levels of trust engage in more cross-border M&A activities. When they do, these acquirers pay lower premiums. To the extent that these acquirers also tend to engage in larger acquisitions as well, our findings suggest that a larger selection pool of potential targets and higher value targets enable these acquirers to negotiate for lower premiums. We do not find evidence of the significant effect for target country trust levels. Hence, trust may benefit those acquiring firms in cross-border transactions.     

Tournament-based incentives and mergers and acquisitions

This research examines the relation between tournament-based incentives, which are proxied by the difference between a firm's CEO pay and the median pay of the senior managers, and mergers and acquisitions (M&As). We find that tournament-based incentives are positively related to firm acquisitiveness and acquiring firms' stock and operating performance. Further analysis indicates that positive acquisition performance increases the likelihood of the CEO being promoted from inside the acquiring firm. Our evidence is consistent with the view that tournament-based incentives motivate acquiring firms' managers to make greater efforts and take more risk that result in superior acquisition performance.     

Corporate Innovations and Mergers and Acquisitions

Using a large and unique patent‐merger data set over the period 1984 to 2006, we show that companies with large patent portfolios and low R&D expenses are acquirers, while companies with high R&D expenses and slow growth in patent output are targets. Further, technological overlap between firm pairs has a positive effect on transaction incidence, and this effect is reduced for firm pairs that overlap in product markets. We also show that acquirers with prior technological linkage to their target firms produce more patents afterwards. We conclude that synergies obtained from combining innovation capabilities are important drivers of acquisitions.