从GDP角度反思我国股市市值的严重膨胀

股票市场具有高风险高收益的特征，即使在行情看涨的格局中，也要警惕可能存在的巨大风险。股市市值与GDP的比值是一个衡量国民经济证券化程度的有效参考指标。高位的“市值／GDP”指标是股市市值严重膨胀的一个示警信号。结合我国本轮经济周期中该指标的走势状况，我们可以重新审视我国股市所隐含的潜在风险。     

泡沫时期中国权证产品收益率的可预测性研究

本文运用Black-Scholes公式计算权证的理论价格并和权证实际价格比较,发现权证的实际价格严重偏离理论价格,权证产品处于泡沫时期。通过Campbell和Yogo(2005)提出的Bonferroni检验方法,我们发现两个新的预测变量———权证与标的股票的交易金额比值和换手率比值,对于权证产品的收益率具有预测能力。     

沪深权证价格偏离分析

沪深证券市场权证理论价格与权证市场价格的偏离现象主要不是理论定价公式的输入变量误差导致的,而是因为股票收益率与权证收益率之间的相关系数与理论预期不一致,乃至相冲突所导致的。权证理论价格与市场价格偏离的主要原因是在当前的交易制度安排下,由于市场限制(摩擦)抑制了套利交易,导致权证市场投机交易占主导,以致权证市场价格偏离长期均衡水平。     

Stock vs. stock-warrant units: evidence from seasoned offerings

Recent theories based on sequential financing and information signaling reveal a special role for warrants. Data from initial public offerings (IPOs) of stock-warrant units have been used to test the theories, and we extend the analysis to seasoned offerings. Consistent with predictions from both families of theories, we find that issues made by smaller and younger firms are more likely to involve stock-warrant units, and firms with greater stock price volatility are more likely to issue units in seasoned offerings. Moreover, firms with relatively high levels of long-term debt, and those whose issues are underwritten by less prestigious underwriters are more likely to employ stock-warrant unit financing. Consistent with information signaling, we find that firms with high managerial ownership are more likely to issue units. Firms that include warrants in their stock offerings are predicted to have experienced higher abnormal stock returns than if they had issued shares alone. Thus, consistent with both theoretical explanations, some firms can reduce capital costs by adding warrants to shares in seasoned offerings.     

创设人在创设武钢权证中的套利机会

2005年11月23日,武钢认购权证和武钢认沽权证开始上市交易,继续延续着中国权证市场的火爆盛况。然而,根据欧式看涨期权和看跌期权的平价公式及不同执行价格的同类期权所必然具有的内在价值规律,我们发现通过适当地构造由武钢认购权证、武钢认沽权证、武钢股票及无风险债券所构成的套利组合,就可获得无风险利润。因此,权证市场对有创设权证资格的证券公司来说存在无风险套利机会,本文根据创设武钢权证的有关规定,具体给出了通过创设武钢认购权证并构造相应套利组合的套利方式。     

香港权证市场发展对我国内地的借鉴研究

我国内地随着股权分置改革的启动于2005年再次将权证引入资本市场。本文学习借鉴成熟的香港权证市场的成功经验,并避免其存在的问题,是有利于我国内地权证市场的稳步健康发展。     

中国权证市场涨跌幅限制效应的实证研究

涨跌幅限制制度作为金融体系中稳定价格,防范价格过度波动的措施之一,被许多国家所采用。一直以来,理论界和实务界对涨跌停机制的实施效应存在争议,焦点集中在制度实施过程中可能存在的流动性干扰效应、波动性溢出效应、价格滞后发现效应和磁吸效应等。自2005年中国权证市场采用涨跌幅限制以来已近五年,其实施效果和对权证市场的发展产生的影响值得我们进行研究和探讨。本文选取截至目前我国已经和正在上市交易的55只权证日交易数据进行分析,检验涨跌幅限制对权证非理性波动的影响,以及流动性干扰效应、波动溢出效应和价格发现延迟效应是否存在,来考察我国权证市场中涨跌幅限制制度的实施效果和效应。     

Institutional changes of Specified Purpose Acquisition Companies (SPACs)

This study documents the changes in the corporate design of modern Specified Purpose Acquisition Companies (SPACs) for the years 2003–2012. Do institutional characteristics of SPACs determine the success of their merger outcomes? The paper finds that SPACs significantly redesigned their structure in the period under observation. In addition, the probability of a merger for SPACs increases if they are able to announce the deal soon after the Initial Public Offering (IPO), if the deal focuses on China and when their IPO is underwritten by Early Bird Capital.     

权证定价探析:CEV模型与B-S公式

权证定价无论在业界和学界都是一个十分重要的问题。利用沪市2006年发行备兑认购权证的六支股票作为标的,实证分析股票价格行为。结果表明CEV(Constant Elasticity of Variance,常方差弹性)模型比对数正态假定能够更好地描述股票价格。在此基础上,利用模拟分析对权证进行了定价,并将定价结果和B-S公式进行了比较。最后给出了对策和建议。     

分离债与可转债发行条款的比较分析

本文结合理论与实际,对我国近期推出的金融产品分离债与可转债的发行条款进行了比较,包括票面利率、债券期限、转股价格和行权价格、赎回条款、回售条款、担保条件、资信评级和向下修正条款等。结果发现,可转债在条款设计上更加倾向于投资者,分离债在条款设计上更加倾向于发行人。同时还对我国目前分离债的条款设置提出了建议。