臺灣博碩士論文加值系統

本研究主要以2007到2010年台灣股票市場上市公司為樣本，探討公司事件宣告前知訊投資人的下單策略以及各類投資人為知訊投資人之可能性。根據Chae (2005)對事件分類的定義，本文以股利與盈餘宣告為預定(scheduled)事件代表，庫藏股與併購宣告則為非預定(unscheduled)事件代表，探討台灣市場委託簿上事件宣告之前期間知訊投資人的委託單策略。研究結果指出，知訊投資人在股利、盈餘以及庫藏股宣告前5天內會傾向下最積極單以及大單，而併購宣告前，知訊投資人則較偏好下次積極單以及中單；投資人別部份，相較於散戶，機構投資人(外資、自營商、其它國內法人)較可能為知訊投資人；而金融海嘯發生前後，事件宣告前知訊投資人的下單策略確實有所差異。本文主要貢獻在於進一步釐清知訊投資人對於資訊反映在下單的偏好，以及不同性質事件宣告下對知訊投資人下單策略之影響。

This study is to investigate informed investors order strategies before event announcements and all types of investors the possibility of informed investors. According to Chae (2005) defined the event classification, this study defines the dividend and earnings announcements as scheduled events, treasury shares and M & A announcements as unscheduled events, and then investigate informed investors order strategies before listed companies'' event announcements on Taiwan stock market. The empirical result show that, informed investors will prefer to submit the most aggressive limit order and large size order before dividend, earnings, and treasury shares announcements, and to submit less aggressive limit order and median size order before M&A announcements. Compared to individual investors, institutional investors (foreign investors, dealers, and other domestic corporations) are more likely to be informed investors. Before and after financial Tsunami, informed investors order strategies before event announcements are indeed different. In this paper, the main contribution are further clarify the informed investors preferences of order strategies, and the impact on informed investors order strategies by event announcements with different feature.

目錄
第一章 前言 1
第一節 研究動機 1
第二節 研究目的 3
第三節 研究架構 6
第二章 文獻探討 8
第一節 事件宣告、資訊不對稱與市場反應 8
第二節 事件宣告、資訊不對稱與投資人下單行為 11
第三章 資料與研究方法 14
第一節 資料敘述 14
一、樣本資料概述 14
第二節 研究方法 18
一、理論模型 18
二、資料處理與變數定義 20
(一)知訊交易 20
(二)委託單積極度 21
(三)委託股數 22
(四)投資人別 23
(五)金融海嘯前後差異分析 24
第三節 模型設定 25
一、主要模型 25
二、交乘項分析 25
三、金融海嘯前後期差異分析 27
第四節 預期研究結果與貢獻 28
第四章 實證結果與分析 29
第一節 資料敘述統計量 30
第二節 各類事件宣告之知訊交易與投資人下單策略、投資人別分析 32
第三節 知訊交易與下單策略及投資人別相關交乘項之分析 37
一、投資人別與委託股數 37
二、投資人別與委託單積極度 39
三、委託單積極度與委託股數 43
第四節 金融海嘯前後差異分析 46
一、 金融海嘯前後比例差異檢定 46
二、 金融海嘯前後解釋變數之差異估計 49
第五章 結論與建議 53
參考文獻 56

表目錄

【表3-1】委託檔資料格式 16
【表3-2】揭示檔資料格式 17
【表4-1】各類事件下單內容之敘述統計量 30
【表4-2】事件前中後三日累積異常報酬率之敘述統計量 31
【表4-3】Probit迴歸估計結果 33
【表4-4】Probit迴歸估計結果─下單策略變數與投資人別變數分開估計 36
【表4-5】投資人別與委託股數交乘項分析 41
【表4-6】投資人別與委託單積極度交乘項分析 42
【表4-7】委託單積極度與委託股數交乘項分析 45
【表4-8】金融海嘯前後解釋變數比例差異之檢定結果 48
【表4-9】金融海嘯前後期委託單內容差異分析之迴歸結果 51
【表4-10】金融海嘯前後期投資人別差異分析之迴歸結果 52

圖目錄
【圖1-1】研究架構流程圖 7

參考文獻
1.Abad, D., S. Sanabria, and J. Yague, 2005,“Liquidity and Information Around Annual Earnings Announcements: An Intraday Analysis of The Spanish Stock Market,”Working Paper.
2.Al-Yahyaee, K., T. M. Pham, and T. S. Walter, 2011,“ The information content of cash dividend announcements in a unique environment,”Journal of Banking and Finance, 35(3), 606-612.
3.Ascioglu, N. A., T. H. McInish, and R. A. Wood, 2002,“Merger announcements and trading,”Journal of Financial Research, 25(2), 263-278.
4.Barclay, M. J., and R. H. Litzenberger, 1988,“Announcement effects of new equity issues and the use of intraday price data,”Journal of Financial Economics, 21(1), 71-99.
5.Barclay, M. J., and J. B. Warner, 1993,“Stealth trading and volatility: Which trades move prices?”Journal of Financial Economics, 34(3), 281-305.
6.Barber, B. M., Y. Lee, Y. Liu, and T. Odean, 2009,“Just how much do individual investors lose by trading?”Review of Financial Studies, 22(2), 609-632.
7.Battalio, R. H., and R. R. Mendenhall, 2005,“Earnings expectations, investor trade size, and anomalous returns around earnings announcements,”Journal of Financial Economics, 77(2), 289-319.
8.Beber, A. and C. Caglio, 2005,“Order Submission Strategies and Information: Empirical Evidence from the NYSE,”Working Paper.
9.Chae, J., 2005,“Trading volume, information asymmetry, and timing information,”Journal of Finance, 60(1), 413-442.
10.Chakravarty, S., 2001,“Stealth-trading: Which traders trades move stock prices?”Journal of Financial Economics, 61(2), 289-307.
11.Christophe, S. E., M. G. Ferri, and J. Hsieh, 2010,“Informed trading before analyst downgrades: Evidence from short sellers,”Journal of Financial Economics, 95(1), 85-106.
12.Easley, D., and M. O’Hara, 1987,“Price, trade size, and information in securities markets,”Journal of Financial Economics, 19(1), 69-90.
13.Easley, D., and M. O’Hara, 1992,“Time and the process of security price adjustment,”Journal of Finance, 47(2), 576-605.


14.Ederington, L. H. and J. H. Lee, 1996,“The creation and resolution of market uncertainty: The impact of information releases on implied volatility,”Journal of Financial and Quantitative Analysis, 31(4), 513-539.
15.Green, T. C., 2004,“Economic news and the impact of trading on bond prices,”Journal of Finance, 59(3), 1201-1233.
16.Harris, L., and J. Hasbrouck, 1996,“Market vs. limit orders: The SuperDOT evidence on order submission strategy,”Journal of Financial and Quantitative Analysis, 31(2), 213-231.
17.Harris, L., 1998,“Optimal dynamic order submission strategies in some stylized trading problems,”Financial Markets, Institutions and Instruments, 7(2), 1-75.
18.Healy, P. M., and P. K. G. Palepu, 2001,“Information asymmetry, corporate disclosure, and the capital markets: A review of the empirical disclosure literature,”Journal of Accounting and Economics, 31(1-3), 405-440.
19.Kaniel, R., and H. Liu, 2006,“So what orders do informed traders use?”Journal of Business, 79(4), 1867-1913.
20.Kyle, A. S., 1985,“Continuous auctions and insider trading,”Econometrica, 53(6), 1315-1335.
21.Lamont, O., and A. Frazzini, 2006,“The earnings announcement premium and trading volume,”Working Paper.
22.Muntermann, J., and A. Guettler, 2007,“Intraday stock price effects of ad hoc disclosures: The german case,”Journal of International Financial Markets, Institutions and Money, 17(1), 1-24.
23.Patell, J. M., and M. A. Wolfson, 1984,“The intraday speed of adjustment of stock prices to earnings and dividend announcements,”Journal of Financial Economics, 13(2), 223-252.
24.Phylaktis, K. and L. Chen, 2010,“Asymmetric information, price discovery and macroeconomic announcements in FX market: Do top trading banks know more?” International Journal of Finance and Economics, 15(3), 228-246.
25.Ranaldo, A., 2006,“Intraday market dynamics around public information arrivals,”Working Paper.
26.Seppi, D. J., 1992,“ Block trading and information revelation around quarterly earnings announcements,”Review of Financial Studies, 5(2), 281-305.
27.Vega, C., 2006,“ Stock price reaction to public and private information,”Journal of Financial Economics, 82(1), 103-133.
28.Yang, H. F. 2009,“So What Orders Do Informed Traders Use? Evidence from Quarterly Earnings Announcements,”Working Paper.
29.李建然、許書偉、李現瑞，2010，「過去買回紀錄對後續股票買回宣告股價反應之影響」.，財務金融學刊，第18卷第4期，頁73~110。
30.林雅玲、馬黛，2011，「透明度、資訊內涵及下單策略之實證研究」，財務金融學刊，第19卷第1期，頁1~32。