融资融券与股票价格波动

 2022-01-23 08:01

论文总字数:38074字

摘 要

融资融券交易制度是发达国家成熟金融市场非常重要的组成部分,但中国股票市场的融资融券交易制度才发展了5年多,规模较小。近年来,对融资融券交易和股价波动的相关研究越来越多,普遍认为融资融券交易能够减少股票价格的波动,有利于稳定股票市场。

本文主要探讨中国A股市场的融资交易和融券交易是否会影响股票价格波动,以及具体的影响。首先分析了融资融券的功能、交易现状以及影响股票价格波动的理论机制,然后对2010年3月31日融资融券试点初期的标的证券进行筛选,剔除了交易数据较少、停盘时间较长的股票,最后得到共计40只。对这40只标的股票,第一步是从它们各自的角度分析,看看融资和融券与股票价格波动是否存在关系,第二步为进一步考察相关关系,将40只标的股票的数据整理成面板,并确定使用固定效应回归模型进行回归估计,分析回归结果说明了什么以及出现的原因。最后,依据实证分析的结果以及理论机制,得出本文的研究结论,并结合中国的具体情况做出可行的政策建议。

融资融券交易制度有利于完善股票市场,应就其与股价波动的关系进行多方向、多方法、更全面的研究。

[关键词]:融资; 融券; 股票价格; 波动

Margin Purchase, Short Sale and Stock Price Volatility

Abstract

Margin purchase and short sale play an important role in developed countries’ mature financial market, however, margin purchase and short sale with a smaller scale in China’s stock market have been developed about five years. In recent years, researches in relationship between margin purchase and short sale and stock price volatility are increasingly common, most of them consider margin purchase and short sale can reduce the volatility of stock prices and help stabilize the stock market.

The paper mainly discusses whether margin purchase and short sale affect the stock price volatility, and what the specific impact is, in China’s A-share market. First of all, analyses the function and the present status of margin purchase and short sale, as well as their theoretical mechanism in affecting stock price volatility. Then, choose the underlying securities in March 31th 2010, which were screened to exclude the securities that have less data, and get a total of 40. To these 40 underlying stocks, the first step is to study whether margin purchase and short sale are relevant to stock price volatility from their respective point of view, the second step is to investigate the correlation between margin purchase and short sale and stock price volatility with unbalanced panel data of these 40 underlying stocks using fixed-effect regression model. With the regression analysis results explaining what it shows and reasons. Finally, based on the results of empirical and theoretical analysis, draws the conclusion of the study, and combined with China’s specific conditions, making feasible policy recommendations.

Margin purchase and short sale help improve the quality of the stock market, more attention should be attached to their relationship with the stock price volatility, with more directions, more methods and more comprehensive studies.

[Key Words]: Margin purchase; Short Sale; Stock Price; Volatility

目录

摘要 I

Abstract II

第一章 引言 1

1.1 研究背景 1

1.2 研究意义 2

1.3文献综述 2

1.3.1 融资融券增加股价的波动 2

1.3.2 融资融券减少股价的波动 3

1.3.3 融资融券对股价波动无显著影响 3

1.3.4 文献评述 4

1.4 研究方法 4

1.5 研究思路与结构安排 4

1.6 可能的创新点 6

第二章 理论分析 7

2.1 融资融券交易的现状 7

2.2 融资融券交易的功能 9

2.3 融资融券交易带来的风险 9

2.4融资融券影响股价波动的作用机制 9

2.5 股价波动的内涵及影响因素 11

2.6 股价波动的测量指标 11

2.7 本文的研究假设 12

第三章 实证分析 13

3.1 个股的时间序列分析 13

3.1.1 数据选取 13

3.1.2 变量选取 13

3.1.3 平稳性检验 13

3.1.4 协整检验 16

3.1.5 格兰杰因果检验 17

3.2 面板数据分析 20

3.2.1 数据选取 20

3.2.2 模型设定 20

3.2.3 回归分析 21

3.2.4 分时间段的回归分析 26

3.3 实证结论 27

第四章 结论与建议 29

4.1 研究结论 29

4.2 政策建议 29

4.3 研究展望 30

致谢 31

参考文献 32

第一章 引言

1.1 研究背景

融资融券交易(又称证券信用交易或者保证金交易)是指投资者对具备融资融券业务资格的证券公司提供担保物品,以借入资金买入有价证券或借入有价证券并出售的行为,换言之:

融资交易(Margin Purchase),别称买空交易,当投资者看涨标的有价证券时,他们可以向有资格的证券公司借来资金购买可以进行融资融券交易的标的证券,当然还要商定限期还款的时间,临商定的时间到时,投资者售出该标的有价证券、归还证券公司借来的资金和利息。

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