Abstract: Margin trading has played an important role in the development of the stock market. However, its impact on Chinese stock market remains to be further studied. This article selects samples from January 2, 2008 to December 31, 2014 and uses TARCH model and GARCH model to study the impacts of margin trading and finds that the introduction of margin trading mechanism would reduce the asymmetric volatility of Chinese stock market and the change of margin trading would increase the volatility of Chinese stock market. Finally, it puts forward some suggestions based on empirical conclusions and current situations of margin trading.

Key words: Margin Trading, Stock Market, Volatility, GARCH Model

摘要： 本文选取的样本区间为2008年1月2日到2014年12月31日,通过GARCH模型和TARCH模型研究融资融券对我国股市波动性的影响。研究表明,融资融券机制的引入能降低股市的非对称波动性,但融资融券余额的增减会加大股市的波动性。

关键词: 融资融券, 股票市场, 波动性, GARCH模型