中國(guó)股票市場(chǎng)的知情交易與信息傳遞效率研究
本文關(guān)鍵詞: 信息不對(duì)稱 市場(chǎng)微觀結(jié)構(gòu) 知情交易 信息含量 價(jià)格行為 市場(chǎng)效率 出處:《天津大學(xué)》2014年碩士論文 論文類型:學(xué)位論文
【摘要】:市場(chǎng)有效性研究一直是金融經(jīng)濟(jì)學(xué)的核心領(lǐng)域。從微觀的角度來(lái)看,有效性并非資本市場(chǎng)的本質(zhì)屬性,而是具備信息優(yōu)勢(shì)的知情交易者與處于信息劣勢(shì)的非知情交易者之間關(guān)于信息與價(jià)格博弈的必然結(jié)果。當(dāng)資產(chǎn)價(jià)格不能反映真實(shí)價(jià)值時(shí),擁有私有信息的知情交易者便還會(huì)采取相應(yīng)行動(dòng),從而打破了原有的價(jià)格均衡并產(chǎn)生了一定的價(jià)格沖擊,但來(lái)自于他們的交易壓力最終將迫使資產(chǎn)價(jià)格向接近其基本價(jià)值的方向變化,直至信息充分反映在價(jià)格之中。在這一過(guò)程中,知情交易會(huì)使資產(chǎn)價(jià)格中包含更多的信息,同時(shí)一些知情交易者、特別是內(nèi)幕交易者又會(huì)試圖掩藏相關(guān)信息從而影響了價(jià)格反映信息的速度。實(shí)際上,信息融入和信息融入速度共同構(gòu)成了信息傳遞效率的兩個(gè)方面。本文基于市場(chǎng)微觀結(jié)構(gòu)理論的研究框架,從信息不對(duì)稱的視角出發(fā),在對(duì)知情交易者的內(nèi)涵加以重新界定之后圍繞知情交易與信息傳遞效率之間的關(guān)系展開了研究與討論,并通過(guò)實(shí)證手段檢驗(yàn)了我國(guó)股票市場(chǎng)的知情交易對(duì)于信息傳遞過(guò)程的影響。 首先,把知情交易者細(xì)分為內(nèi)幕交易者和信息加工者,通過(guò)構(gòu)建能夠反映對(duì)稱性訂單流沖擊的拓展PIN模型分別度量出兩類知情交易概率,以資本資產(chǎn)定價(jià)模型的可決系數(shù)作為股價(jià)私有信息含量的代理指標(biāo),利用非平衡面板回歸分析的方法考察了兩類知情交易在信息傳遞中的作用。 然后,考慮市場(chǎng)環(huán)境和信息環(huán)境對(duì)于知情交易信息傳遞作用的影響,進(jìn)一步探討了不同市場(chǎng)環(huán)境下知情交易與股價(jià)私有信息含量之間的關(guān)系。 接下來(lái),,采用事件研究方法分析并比較了三個(gè)典型信息事件揭示期間的知情交易變化與價(jià)格沖擊現(xiàn)象,檢驗(yàn)了兩類知情交易能否在信息融入速度的層面上促進(jìn)市場(chǎng)效率的提高。 最后,總結(jié)全文,指出了文中存在的不足并給出了未來(lái)的研究展望。
[Abstract]:The study of market efficiency has always been the core field of financial economics. From the micro point of view, efficiency is not the essential attribute of capital market. It is the inevitable result of information and price game between informed traders with information advantage and uninformed traders who are in information disadvantage. Informed traders with private information also take action to break the original price equilibrium and create a price shock. But trading pressure from them will eventually force asset prices to move closer to their basic value until the information is fully reflected in the price. In the process, informed trading will lead to more information in asset prices. At the same time, some informed traders, especially insider traders, will try to hide the relevant information, thus affecting the speed of the price reflecting the information. In fact, Information integration and information integration speed constitute two aspects of information transmission efficiency. Based on the research framework of market microstructure theory, this paper starts from the perspective of information asymmetry. After redefining the connotation of informed traders, this paper studies and discusses the relationship between informed transactions and the efficiency of information transmission. The influence of informed trading on the process of information transmission in China's stock market is tested by empirical means. Firstly, the informed traders are divided into insider traders and information processors. By constructing an extended PIN model which can reflect the impact of symmetric order flows, we measure the probability of two types of informed transactions. Taking the determinacy coefficient of capital asset pricing model as the proxy index of the private information content of stock price, this paper investigates the role of two types of informed transactions in information transmission by using the method of non-equilibrium panel regression analysis. Then, considering the influence of market environment and information environment on the information transmission of informed transaction, the relationship between informed trading and private information content of stock price in different market environment is further discussed. Then, this paper analyzes and compares the changes of informed transactions and price shocks during the disclosure of three typical information events by using the event study method. This paper examines whether two types of informed transactions can promote market efficiency at the level of information integration speed. Finally, the paper summarizes the full text, points out the shortcomings of the paper and gives the future research prospects.
【學(xué)位授予單位】:天津大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:F832.51
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