基于高頻數(shù)據(jù)的機構(gòu)持股與股價信息效率關(guān)系研究
本文選題:分筆高頻數(shù)據(jù) + 機構(gòu)持股; 參考:《中國科學(xué)技術(shù)大學(xué)》2017年碩士論文
【摘要】:近些年來,機構(gòu)投資者快速發(fā)展,已經(jīng)成為金融市場中的重要力量。相比于個人投資者,機構(gòu)投資者具有更多的信息來源渠道和更強的信息處理能力,被監(jiān)管層寄予改善金融市場信息質(zhì)量的厚望。然而,機構(gòu)投資者是否能起到穩(wěn)定市場、提高市場信息效率作用?對于這一問題一直沒有定論。本文利用上海證券交易所A股所有個股的分筆高頻交易數(shù)據(jù),基于Hasbrouck價格分解的思想計算了個股在每個交易日的股價信息效率,并在此基礎(chǔ)上分析了機構(gòu)持股比例對股價信息效率的影響。研究結(jié)果表明,總體而言,機構(gòu)持股比例對股價信息效率具有顯著的負(fù)向影響,機構(gòu)持股比例越高,導(dǎo)致股價信息效率越低。并且,這一結(jié)論在采用不同的股價信息效率指標(biāo)和不同的流動性指標(biāo),以及將樣本限定為上證180指數(shù)的樣本股的情況下均保持不變。但是,更細(xì)致的分析發(fā)現(xiàn),對于流動性最好的那部分股票,機構(gòu)持股比例和股價信息效率具有顯著的正相關(guān)關(guān)系,這一結(jié)果揭示了流動性所扮演的重要角色。格蘭杰因果.檢驗的結(jié)果顯示,機構(gòu)持股比例是股價信息效率的格蘭杰原因,但反之并不成立;并且,流動性和機構(gòu)持股比例之間互為格蘭杰原因。這一結(jié)果說明機構(gòu)持股比例可以直接影響股價信息效率,而流動性則可以通過影響機構(gòu)持股比例來間接影響股價信息效率。此外,本文還將所有樣本分為了牛市、熊市兩部分分別進行實證分析,結(jié)果顯示,牛市、熊市兩種不同市場背景下的結(jié)論與前述結(jié)論保持一致。本文的研究結(jié)論表明,機構(gòu)持股比例的提高,并沒有提高金融市場的信息有效性。在大力發(fā)展機構(gòu)投資者的同時,加強對機構(gòu)投資者的監(jiān)管和引導(dǎo)至關(guān)重要。流動性對股價信息效率具有正向影響,并會影響機構(gòu)持股和股價信息效率之間的關(guān)系,應(yīng)該致力于提高金融市場的流動性。
[Abstract]:In recent years, the rapid development of institutional investors has become an important force in the financial market. Compared with individual investors, institutional investors have more sources of information and stronger ability of information processing, so regulators place great hopes on improving the quality of information in financial markets. However, can institutional investors stabilize the market and improve the efficiency of market information? There has been no conclusion on this issue. Based on the high-frequency trading data of all A-shares in Shanghai Stock Exchange, this paper calculates the information efficiency of individual shares in each trading day on the basis of Hasbrouck's idea of price decomposition. On this basis, the paper analyzes the effect of institutional shareholding ratio on stock price information efficiency. The results show that, overall, institutional shareholding ratio has a significant negative impact on stock price information efficiency, the higher the institutional shareholding ratio, the lower the stock price information efficiency. Moreover, this conclusion remains unchanged when different stock price information efficiency index and different liquidity index are adopted, and the sample is limited to the sample stock of Shanghai 180 index. However, a more detailed analysis shows that there is a significant positive correlation between institutional shareholding ratio and stock price information efficiency for the most liquid stocks, which reveals the important role of liquidity. Granger cause and effect. The test results show that institutional shareholding ratio is the Granger reason of stock price information efficiency, but the reverse is not true; moreover, liquidity and institutional shareholding ratio are mutual Granger reasons. The results show that institutional shareholding ratio can directly affect the information efficiency of stock price, while liquidity can indirectly affect the information efficiency of stock price by influencing institutional shareholding ratio. In addition, all the samples are divided into bull market and bear market respectively. The results show that the conclusions of bull market and bear market are consistent with the previous conclusions. The conclusion of this paper shows that the increase of institutional shareholding does not improve the information efficiency of financial market. While vigorously developing institutional investors, it is essential to strengthen the supervision and guidance of institutional investors. Liquidity has a positive effect on the information efficiency of stock price, and will affect the relationship between institutional shareholding and information efficiency of stock price. Therefore, we should focus on improving the liquidity of financial market.
【學(xué)位授予單位】:中國科學(xué)技術(shù)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:F832.51
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