硕士学位论文股票期权定价研究——以万科集团股票期权激励为例RESEARCH ON THE PRICINGFORMULA OF STOCKOPTIONS OPTIONS——————TAKINGTAKING AN EXAMPLE OF VANKE`S STOCK OPTIONSINCENTIVE杨双双哈尔滨工业大学2014年6月国内图书分类号:830.9学校代码:10213国际图书分类号:336密级:公开金融硕士学位论文股票期权定价研究——以万科集团股票期权激励为例硕士研究生:杨双双导师:冯晋副教授申请学位:金融硕士学科:金融所在单位:管理学院答辩日期:2014年6月授予学位单位:哈尔滨工业大学Classified Index:830.9U.D.C:336Dissertation for the Master`s Degree in FinanceRESEARCH ON THE PRICING FORMULA OF STOCK OPTIONS——TAKING AN EXAMPLE OF VANKE`S STOCK OPTIONSINCENTIVECandidate:Shuangshuang Yang Supervisor:Prof.Jin FengAcademic Degree Applied for:Master of FinanceSpeciality:FinanceAffiliation:School of ManagementDate of Defence:June,2014Degree-Conferring-Institution:Harbin Institute of Technology哈尔滨工业大学金融硕士学位论文摘要股票期权激励在现代企业激励制度中所扮演的角色已经成为了学者和管理者最为关注的问题之一,股票期权的定价研究是最重要的。
而目前对于股票期权的定价研究还是基于公式自身,并未考虑企业自身机制的因素。
本文在考虑B-S和二叉树模型自身的基础上,加入离职率和个人所得税的要素,对其进行改进并应用到具体的实例中。
本文首先结合已有的研究成果介绍了期权的分类、界定了股票期权和股票期权激励的概念、股票期权激励的优劣势和适用条件、对决定期权定价的各个因素进行介绍,对本文的研究基础作出界定;其次,引入古典的B-S模型并对其进行离职率改进,在形成新的模型公式的基础上应用到万科集团股票期权激励计划中,证明了离职率是股票期权定价的一个重要因素。
再次,引入古典的二叉树模型、介绍了个人股票期权所得个人所得税的征税方法,并对其进行个人所得税的改进,在形成新的模型公式的基础上应用到万科集团股票期权激励计划中,证明了个人所得税是股票期权定价的一个重要因素。
本文在研究离职率对股票期权定价的影响时,选取了2011年5月10日和2012年7月12日两个万科集团离职率较高的节点。
充分证实了猜想,不考虑离职率的股票期权定价远远高于考虑离职率的股权期权定价,股票期权持有者不考虑离职率的定价高估了现有的价值。
在研究个人所得税对股票期权定价的影响时,由于实际情况过于复杂,构建了一个模拟的样本,将改进的模型应用到样本中,证明不考虑个人所得税的样本期权总价值高于考虑个人所得税的样本期权总价值。
股票期权持有者不考虑个人所得税的定价高估了期权的价值。
在基础、修正、实证的基础上得出结论,并对现行的企业期权激励制度给予建设性意见。
关键词:股票期权定价;离职率;个人所得税;B-S模型;二叉树模型哈尔滨工业大学金融硕士学位论文AbstractThe role of stock options incentive in modern company incentive scheme has been an important problem in scholars and executives`eyes,the study of the pricing formula of stock options is special.But at present,the study of the pricing formula of stock options is on the base of formula itself,company environment is not included.On the base of B-S model and Binomial tree model,this paper includes quit rate and individual income tax,consummate and combine with actual cases on B-S model and Binomial tree model.At first,this paper analyzes the classification of the options、two concepts of stock options and stock options incentive、the advantage、disadvantage and the suitable conditions of the stock options incentive、the key factors of the pricing formula of stock options,build the base of paper study.Second,perfect the B-S model existed on the factor of quit rate,combining with actual case of VANKE`s stock option incentive plan,we found quit rate is one important factor of the pricing formula of stock options.Third,analyzed the levy method on the ones who hold the stock option in the point of view of the individual income tax,improve the Binomial tree model existed on the factor of the individual income tax,apply the improvement formula to the actual case of VANKE`s stock option incentive plan,we found the individual income tax is one important factor of the pricing formula of stock options.On the part of the study of the role of quit rate on the pricing formula of stock options,via choosing appropriate time:05.10.2011、07.12.2012,which is higher in VANKE`s turnover.Fully proved the point,the pricing formula of stock options which is not include the quit rate is higher than the pricing formula of stock options which is include the quit rate,the holders of stock options overestimate the pricing formula of stock options which is not include the quit rate.On the part of the study of the role of individual income tax on the pricing formula of stock options,because the actual cases is too complex,build an simulated sample,apply the improved model in the sample,we f found the sample`s total value which is not include the individual inconme tax is higher than the sample`s total value which is include the individualicome tax is higher than the sample`s total value which is include the individual income tax.The holders of stock options overestimate the pricing formula of stock options which is not include the individual income tax.On the base of the foundation、the improvement、the empricial,we draw a conclusion,and put forward哈尔滨工业大学金融硕士学位论文the constructive suggestions on the company stock incentive scheme.Key Words:The pricing formula of stock options,Quit rate,Individual income tax,B-S model,Binomial tree model哈尔滨工业大学金融硕士学位论文目录摘要 (I)ABSTRACT (II)第1章绪论 (1)1.1研究的背景和意义 (1)1.2国内外研究现状及分析 (3)1.2.1国外研究现状 (3)1.2.2国内研究现状 (6)1.2.3国内外研究评述 (7)1.3本文的主要研究内容 (8)第2章对股票期权激励相关理论进行界定 (11)2.1对股票期权和股票期权激励进行界定 (11)2.1.1期权的分类 (11)2.1.2股票期权的定义 (11)2.1.3股票期权激励的定义 (12)2.2股票期权激励的优势、劣势和适用条件 (13)2.2.1期权激励具有的优势和劣势 (13)2.2.2期权激励的适用条件 (15)2.3股票期权要素的界定 (16)2.3.1股票价格和执行价格 (16)2.3.2到期期限 (17)2.3.3波动率 (17)2.3.4无风险利率 (17)2.3.5未来的红利 (18)2.4本章小结 (18)第3章离职率对定价模型的修正 (19)3.1股票期权的古典定价模型--B LACK-S CHOLES定价模型 (19)3.2对B-S定价公式进行离职率修正 (23)3.3离职率对万科集团股票期权定价修正的实证分析 (24)3.4本章小结 (26)哈尔滨工业大学金融硕士学位论文第4章个人所得税对二叉树定价模型的修正 (28)4.1股票期权的基本定价模型--风险中性理论下的二叉树模型 (28)4.2股票期权个人所得在个人所得税方面的征税方法 (30)4.3考虑个人所得税对二叉树模型的修正 (31)4.4个人所得税对万科集团股票期权定价修正的实证分析 (33)4.5本章小结 (35)结论 (36)参考文献 (38)附录 (43)附录1万科集团2011.04.25-2012.07.31日股票价格 (43)附录22011年4月25日A股股票期权激励计划(草案修订稿)激励对象的变化 (46)附录3关于股票期权授予登记完成的公告 (47)附录4关于万科企业股份有限公司A股股票期权行权价格调整的法律意见 (48)附录5关于A股股票期权激励计划第一个行权期行权事宜的公告 (50)哈尔滨工业大学学位论文原创性声明和使用权限 (51)致谢 (52)哈尔滨工业大学金融硕士学位论文第1章绪论1.1研究的背景和意义现代的企业都有一个明显的特点,那就是所有者只拥有企业的控制权,而把经营权交给另一个人,通过给予其费用的形式使其完成任务,可是经营者是以自身的利益为目标,而所有者是以公司的利益为目标,这样就形成了一种委托代理关系[1]。