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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

筆記型電腦抑或桌上型電腦?:桌上型廠商之營運策略及預測

張順風 Unknown Date (has links)
自1999開始, 筆記型電腦的年成長速度遠高於整個個人電腦市場的成長率, 我們合理的懷疑筆記型電腦將有可能會取代桌上型電腦的部份市場(簡稱”取代效應”)¸ 本論文的目的就是要預測這個”取代效應是否存在? 假設這個”取代效應”存在, 它對桌上型電腦廠商會產生什麼樣的影響? 桌上型電腦廠商應該如何調整營運策略? 從模型的預測結果來看, 筆記型電腦並不會取代桌上型電腦的市場. 反觀實際發生的事實及趨勢, “取代效應”很又很明顯的存在 . 假設事實發生的趨勢不會改變, 改以實際發生的事實做趨勢預測, 得到的結果是-“取代效應”己於2008開始發生, 而且筆記型電腦將完全取代桌上型電腦. 綜合上述二個預測的結果, 假設市場趨勢在5年內不會有大改變, 本預測結果的結論是:”取代效應”確實存在, 桌上型電腦的銷售量將於5年內縮減到只剩下2007年的一半. 因應桌上型電腦市場的萎縮, 桌上型電腦供應商應及早做出策略調整, 以避免所有可能的影響. 其中尤其重要的是”過剩產能如何應用?”及”未來新市場/新產品的開發策略”.
2

檢視”預測”在巴斯夫公司管理流程中之應用 / Examine forecasting as a business process in BASF

莊馥銘, Chuang, Sandy Unknown Date (has links)
檢視”預測”在巴斯夫公司管理流程中之應用 / ABSTRACT As the competition in today’s markets for products and services becoming more and more intense, it is imperative for companies to improve their attempts to plan for the future (Smith & McIntyre, 1994). Literature reviews have shown clear linkage between forecast accuracy and the company’s bottom line. Improving the accuracy and timeliness of internal forecasts increases revenue predictability and operating margins, which are keys in today’s volatile economy. BASF is a chemical company founded in Germany in 1865. “Earn a premium on the cost of capital” is one of the four strategic guidelines of BASF 2015. Reliable forecast is one of the critical value drivers supporting the strategic guidelines. Effective forecasting creates value through resource optimization, inventory reduction and ultimately increase profits and directly impacting financial results. The paper uses the results of interviews and questionnaires conducted by a project team within BASF as the basis for analysis. Though it is not an official forecasting audit, similar approach was undertaken. Forecasting as it is used in BASF is reviewed. The findings of interviews and surveys conducted are summarized. The before and after status of forecasting in BASF are examined for comparison. Forecasting is an integrated system of tools, people factors and processes. From the analysis, it is found that making more investment in tools does not necessary improve forecasting performance unless the people factors are addressed and comprehensive standard operating practices (SOPs) are adopted. Usage of forecasts is as important as the generation of forecasts. Sales team involvement and increased collaboration in the generation of forecast helped as leverage for better forecasting. In addition, forecast accuracy as performance measures emphasizes task ownership and encourages better performance. Though various forecasts are performed in business operations, ranging from economic trend, interest and exchange rates, raw material and commodity prices, production capacity, product requirements to the company’s bottom line, but some are better forecasted centrally or globally, some regionally and some locally. There is no definite conclusion as to whether decentralized or centralized forecasts are better than the other as it is dependent on the specific forecast and its usage. With the merger and acquisitions activities often undertaken by companies, forecast management is an even more important task to maintain the customers and grow the sales during and after the integration of these businesses throughout the world. Regular forecasting audits should to be conducted and corrective measures be monitored for sustainable improvements.
3

建立事先性財務預測品質評估指標之可行性研究

曾惠芸, Hui-Yun, Tseng Unknown Date (has links)
本研究嘗試從建立一個事先性評估財務預測品質之指標,以改善現行公司強制性財務預測無法真實反應公司營運狀況,以及公司方面利用強制性財務預測作為操縱股價的工具等種種的財務預測市場不效率性。 所採用之研究方法乃以某特定公司於財務預測公告日前一年內之資訊為基礎。利用本年度已公開財務資訊(包括月營收與盈餘資訊),計算公告預測年度之成長率。其次,再利用公告日前一年度的實際盈餘結果加上公告預測年度之成長率乘於公告日前一年度實際盈餘結果,發展出一獨立於公告財務預測的推估銷貨收入、營業利益、稅前淨利及每股盈餘等,稱此為本準則推估值。最後,我們並進一步比較本準則推估值、公司發佈之強制性預測值、實際盈餘值等之間的(平均數)差異性。 本研究所選樣本包括除了金融保險業之外的所有上市公司,樣本資料期間為民國80年至86年,包括銷貨收入、營業利益、稅前淨利及每股盈餘等會計項目的強制性預測,總樣本數分別為3,128、3,127、3,128及3,127,資料來源為台灣經濟新報社資料庫。在檢定上,同時採用T test以及無母數檢定Wilcoxon Sign Rank test實證結果除了發現公司強制性預測具有高度的不準確性之外,也發現無論由本準則所預測或強制性預測,公司的兩大主軸科目:銷貨收入及營業利益之預測,第二次預測多較第一次預測來的準確。此即表示本篇所訂定之準則:由前一年間所能蒐集之資訊(本研究此處僅以營業成長率為代表)來預測下一年度之營業狀況,若所採用之資訊愈多(例如:第一次預測僅採用前一季之銷貨收入,而第二次預測採用了前三季之銷貨收入),則其預測程度愈為精確。而無論本準則與強制性預測間之差距為何,本準則可加以精細化,以作為事前管理工具之基礎。 第一章 緒論 第一節 研究動機 第二節 研究問題 第三節 研究方法 第四節 研究架構與流程 第二章 文獻回顧 第一節 我國財務預測相關法源 第二節 財務預測資訊內涵 第三節 影響財務預測準確性因素之探討 第四節 財務預測與盈餘管理 第五節 財務預測公告與內線交易 第三章 研究方法 第一節 研究假說 第二節 變數衡量與操作性步驟 第三節 資料說明 第四章 實證結果 第五章 結論與建議 錯誤! 尚未定義書籤。2 第一節 結論 錯誤! 尚未定義書籤。2 第二節 建議 錯誤! 尚未定義書籤。3 附錄 錯誤! 尚未定義書籤。 參考文獻 錯誤! 尚未定義書籤。1
4

財務分析師預測修正之行為研究 / Factors affecting the revision of financial analysts'forecast

周佩冠, Chou, Pei Kuan Unknown Date (has links)
隨著企業環境競爭日趨白熱化及證券市場之蓬勃發展,使得預測性資訊,尤其是分析師盈餘預測資訊,在投資者之決策過程中,扮演著愈來愈重要的角色。因此本論文欲探討財務分析師修正預測的過程中,所考慮的因素有哪些及其相對重要性,以對分析師修正預測之決策過程有更深入的了解。本論文基於過去文獻及訪談實務界之結果,衍生出三個探究性問題︰ (1)影響國內分析師修正預測之因素為何﹖是公司所正式發布的會計資訊﹖或是各種經由非正式來源所得到的公司私有資訊﹖ (2)預測機構種類不同,在預測修正時所需的資訊是否會有顯著的差異﹖若有顯著差異會在哪些因素有差異呢﹖ (3)預測機構規模不同,修正預測之因素是否會有顯著的差異﹖若有差異存在,會在哪些方面有差異呢﹖在此三個主題下,本研究採用問卷調查的方式,提出八類可能會影響分析師修正預測之變數,分別為︰總體經濟政治及政府政策面、公司本業面、公司業外面、會計面、股市交易影響面、來自公司外部的消息面、來自公司內部的消息面及管理當局修正預測面。經由實證結果,本研究獲致以下的結論︰ (1)在影響分析師修正預測的重要因素方面︰最重要的層面為公司本業面,其次為總體經濟政治政策面,然後才為公司業外面及來自公司內部的消息面﹔而為過去研究所廣泛探討的管理當局修正預測面及會計面,則不被財務預測人員認為是修正預測時之重要層面,但仍具參考價值﹔而股市交易之影響面對分析師修正預測時之影響不大。 (2)在預測機構種類對預測修正因素的影響方面︰投資信託公司,投資信託公司及綜合證券商在預測修正時所使用的資訊並無顯著的不同﹔但銀行信託部門卻和前三種預測機構在來自公司內部的消息面及管理當局修正預測面有顯著的差異。(3)在預測機構規模對預測修正因素的影響方面︰規模不同的預測機構會在融資融券使用率,詢問顧客及供應商及拜訪公司管理當局及員工三個因素有差異,與預測機構種類所構成的差異相類似。
5

台灣經濟成長率與其組成因子之預測績效評估 / The Forecast Performance of GDP and GDP components

陳建安 Unknown Date (has links)
本篇論文以 Sinclair and Stekler (2013) 作為基本架構,以台灣主計總處每個二、五、八及十一月所發布新聞稿內的經濟成長作為研究對象,透過多個面向來探討檢驗主計總處所提供的經濟預測,本文除了探討經濟成長外,也一併探討其組成因子,並在最後 做一個全面性的檢視。我們的實證結果顯示,主計總處在對於經濟成長及其組成因子的預測上,還具有進步的空間,其大多數的變數都不具效率性,即其預測值沒有將所有可用的訊息給包含進去。但若以組成份子的平均向量來看,主計總處的預測值和其後 一季的實現值,兩者間並沒有顯著的差異,故我們可以確認,平均來看,主計總處所提供的預測值還是可以為研究者作為參考依據。
6

我國上市公司各種財務預測準確度之比較研究--強制性預測、自願性預測與分析師預測之比較

祝美玲 Unknown Date (has links)
本論文旨在探討管理當局自願性、強制性與財務分析師預測資訊的相對準確度。在比較相對準確度時,由於財務分析師及管理當局所揭露的財務預測資訊不是稅前盈餘便是營收資料,故在衡量準確度時便有稅前淨利的準確,及營業收入的準確。故本研究擬探討有關稅前淨利與營業收入的相對準確性。並進一步探討三種預測資訊來源的相對準確度何者為優?此相對準確度是否會因預測值釋放時機、行業別、公司規模大小、股市多/空頭、及企業盈餘變異性的高低而有所不同?本研究的樣本期間為民國81年至84年,共取得184家上市公司的預測資料,採用必要的統計方法進行資料分析,研究結果如下: 1、三種財務預測資訊來源的營業收入預測的準確度皆比稅前盈餘預測來的高,且皆達顯著水準。 2、就全樣本而言,強制性在對營收及稅前盈餘預測方面皆有較佳的準確度,分析師及自願性對營收預測的準確度相當,稅前盈餘方面則以自願性為優。 3、就預測值釋放時機而言,強制性預測不論在那個時機發佈:其準確度均有一定的水準,不受釋放時機不同而有所影響。至於自願性與分析師的相對準確性,一般均以自願性為佳,且達顯著水準。 4、就年度別而言,強制性預測的準確度在各年間並無顯著差異,而自願性及分析師預測的準確度則有逐年提高的趨勢,具有顯著的學習效果。 5、就行業別而言,一般仍以強制性為佳、自願性次之及分析師較差。 6、就公司規模大小而言,三種預測資訊來源對較大規模公司所做的營收或稅前盈餘準確度均比小規模為佳,且達顯著水準。 7、就股市多/空頭而言,強制性均最佳、自願性次之而分析師較差。此外,三種預測資訊來源對多頭市場預測的準確度均較空頭市場為優。 8、就盈餘變異程度而言,強制性均最佳,自願性次之而分析師較差。而在變異性較高的群組中,自願性與分析師並無額著差異。此外,就營收預測來看,盈餘變異大小對三種預測資訊來源各自的預測能力並無顯著的影響。就稅前盈餘預測來看,三種預測資訊來源對盈餘變異性較小的公司所做的預測較佳。
7

年報揭露程度與分析師盈餘預測關係之研究

張窈菱 Unknown Date (has links)
本文旨在檢視股東會年報之資訊揭露是否具有預測價值,分別以年報資訊數量及品質二者與分析師盈餘預測誤差及分歧程度之關係探討之。研究結果顯示,年報揭露之資訊數量與資訊品質愈高,分析師盈餘預測誤差愈低,足見我國年報內容有助於提升分析師預測準確度。就年報揭露程度與分析師盈餘預測分歧程度之關聯性而言,本研究發現,年報資訊揭露數量愈多,分析師預測分歧性愈低;然本研究並未能證實,年報資訊揭露品質與分析師預測分歧性具有顯著的反向關係。換言之,資訊數量與預測分歧性具有較強的負向關聯性,而資訊品質則否。前述研究結果顯示,公司增加年報揭露項目,有助於提升各分析師對未來盈餘預測的共識,然經考量揭露內容的品質之後,其對預測分歧性的影響則較不明顯。推論原因,可能係年報揭露內容不足,使得分析師進行預測時尚須蒐集額外資訊以為彌補,以致降低年報揭露對預測分歧性的影響。
8

Box-Jenkins模式在預測上的研究

任如意 Unknown Date (has links)
No description available.
9

強制性財務預測揭露對法人投資機構交易量之影響 / Effect of mandated financial forecasts announcements on the trading volume of institutional investors

楊金鳳 Unknown Date (has links)
為達學術研究與實務結合、及研究更深入本土化,本論文結合證券專業經理人訪談、個案分析與訪談與實證研究三種方式,探討強制性財務預測揭露對法人投資機構交易量之影響。 一、證券專業經理人訪談 訪談對象為國內法人投資機構之專業經理人,訪談內容主要在瞭解,法人的投資行為、憑藉的資訊來源、及以使用者的角度來看當前財務預測制度。經由訪談,本研究得以初步地建立問題、確定問題的可研究性。訪談結果:受訪者認為國內法人投資者對強制性財務預測之交易量反應會較外資強,至於散戶是否會參考此項資訊則持懷疑態度。 二、個案分析與訪談 整理、彙總國內自民國80年「公開發行公司財務預測資訊公開體系實施要點」實行以來,因違反規定而招證券暨期貨管理委員會處罰的案例進行訪談。藉由訪談,本研究得以確定研究問題、建立研究假說、及使用之研究方法,而訪談所觀察到的現象更可為實證研究結果,提供解釋的方向。訪談結果:大部分的受訪者認為法人較會參考財務預測資訊。 三、實證研究 以國內上市公司為研究對象,蒐集民國八十三年一月(自營商之分析自民國八十五年一月)至民國八十六年十二月的資料,實證結果: (一)原始強制性財務預測資訊揭露時,市場有顯著之異常交易量,且其異常交易量與公司規模大小呈正相關,與未預期盈餘則沒有顯著關係。 (二)原始強制性財務預測資訊揭露時,外資有顯著之異常交易量,且其異常交易量與未預期盈餘、公司規模大小呈正相關。 (三)原始強制性財務預測資訊揭露時,自營商沒有顯著之異常交易量,其異常交易量與未預期盈餘、公司規模大小無顯著關係。 (四)正向之財務預測更新資訊揭露時,市場有顯著之異常交易量,且其異常交易量與正向更新幅度、公司規模大小呈正相關。 (五)正向之財務預測更新資訊揭露時,外資有顯著之異常交易量,且其異常交易量與正向更新幅度呈正相關,與公司規模大小則沒有顯著關係。 (六)正向之財務預測更新資訊揭露時,自營商沒有顯著之異常交易量,其異常交易與正向更新幅度、公司規模大小無顯著關係。 (七)負向之財務預測更新資訊揭露時,市場有顯著之異常交易量,且其異常交易量與負向更新幅度呈正相關,與公司規模大小則無顯著關係。 (八)負向之財務預測更新資訊揭露時,外資沒有顯著之異常交易量,其異常交易量與負向更新幅度、公司規模大小無顯著關係。 (九)負向之財務預測更新資訊揭露時,自營商有顯著之異常交易量,其異常交易量與負向更新幅度、公司規模大小無顯著關係。 四、三種研究方法之研究結果說明: 經由證券專業經理人訪談、個案分析與訪談以及實證測試,本研究得出下列綜合性結論: (一)國內法人投資機構,外資與自營商對強制性財務預測之反應確實有很大不同。 外資在原始、正向更新資訊有顯著之異常交易量;而自營只對負向更新資訊有異常反應。外資有異常交易量的部分跟未預期盈餘/更新幅度有關,但自營商則否。可能外資的投資決策較重國際情勢,看法較客觀;相較之下自營商有短期績效壓力,而其資訊取得也較便利而多元,因而促成兩大法人在資訊的反應上有很多不同。 (二)除正向更新外,原始預測、負向更新資訊市場整體的反應時點,都較有顯著異常交易量的法人慢。 法人投資者在資訊取得成本與速度都較散戶低而快。一般來說,法人會主動瞭解營業狀況,不會等到訊息發佈時才注意該資訊;而散戶大部分仰賴公司公告的數字與小道消息,在資訊的接收上較被動,促使一般投資者與法人投資者在反應的時間上有所差別。 (三)市場對更新資訊確實較法人投資者易受強制性財務預測調高、調低幅度的影響。 在更新資訊上,外資只對正向更新有顯著異常交易量,且與更新幅度有關;自營商則只對負向更新有顯著異常交易量,但與更新幅度沒有顯著關係;然市場整體對正、負向更新均有異常交易量反應,且與更新幅度也都有關聯性存在。依據市場供需法則,交易量會影響股價,因此一公司對財務預測的調高、調低確實可能帶動股價的變動;而受影響最大的可能便是一般投資者。 (四)自營商為國內本土的法人投資者,且有自己的財務分析師,確實較市場、外資在強制性財務預測資訊發佈時,沒有異常交易量反應。 國內法人投資者極重視自己內部分析師所做之研究。另外,經常拜訪公司及同業也是他們資訊取得相當重要的一環。雖然自營商極重視財務預測資訊,但因取得管道與時間上較多元與彈性,因而造成其對資訊的反應有別於外資與整體市場。 / The thesis combined case study and field visits to investigate the effect of mandated financial forecasts announcements on the trading volume of institutional investors. It links up theory and practice and focuses on an issue of significant local interest. I. Field Visits Visits were made to institutional investment managers. The purposes of these visits included understanding the behavior of institutional investors, the source of their information, and their views on the mandatory disclosure system. The visits also helped to ensure that the subjects for the study had sufficient experience to shed light on the topic. Most of the managers interviewed deemed the abnormal trading volume of domestic institutional investors during the mandated financial forecasts disclosure period to be much greater than that of foreign investors. They also expressed doubt that the general investors refer to the financial forecasts information. II. Case Study and Visits Visits were made to managers of companies that had violated the mandatory disclosure system. Theses visits helped to define and focus the thesis, developing the hypotheses, and selecting the research method. THe visits also provided insights useful for interpreting the empirical results. Most of the managers interviewed considered institutional investors more likely to refer to the mandated financial forecasts information than general investors. III. Empirical Results The data included earnings and trading volume of all domestic listed firms between January 1, 1994 (securities dealers from January 1, 1996) and December 31, 1997. The results of the empirical investigation are: 1. There is significant abnormal trading volume for the stock market as a whole during the first mandated financial forecasts disclosure period. The larger the firm, the greater the abnormal trading volume. There is no significant relation between the abnormal volume and the absolute value of unexpected earnings. 2. There is significant abnormal trading volume by foregin investors during the first mandated financial forecasts disclosure period. The larger the firm and the absolute value of unexpected earnings, the greater the abnormal trading volume. 3. There is no significant abnormal trading volume by securitites dealers during the first mandated financial forecasts disclosure period. There also is no significant relation between abnormal volume and the absolute value of unexpected earnings with firm size. 4. There is significant abnormal trading volume for the stock market as a whole during the positive updated mandated financial forecasts disclosure period. The larger the firm size and the higher the absolute value of the updated, the greater the abnormal trading volume. 5. There is significant abnormal trading volume by foreign investors during the postitive updated mandated financial forecasts disclosure period. The greater the absolute value of the update, the greater the abnormal trading volume. There is no significant relation between the abnormal volume and firm size. 6. There is no significant abnormal trading volume by securities dealers during the positive updated mandated financial forecasts disclosure period. There also is no significant relation between abnormal volume and the absolute value of the update with firm size. 7. There is significant abnormal trading volume for the stock market as a whole during the negative updated mandated financial forecasts disclosure period. The greater the absolute value of the update, the greater the abnormal trading volume. There is no significant relation between the abnormal volume and firm size. 8. There is no significant abnormal trading volume by foreign investors during the negative updated mandated financial forecasts disclosure period. There also is no significant relation between abnormal volume and the absolute value of the update with firm size. 9. There is significant abnormal trading volume by securities dealers during the negative updated mandated financial forecasts disclosure period. There is no significant relation between abnormal volume and the absolute value of the update with firm size. IV. Combined Results form Research Methods The results of combining visits with the securities investment managers, case study and interviews, and empirical investigation are: 1. Foreign investors and securities dealers react differently to mandated financial forecasts announcements. Foreign investors have significant abnormal trading volume to the first and positive updated mandated financial forecasts disclosure information. Securities dealers have significant abnormal trading volume to the negative updated mandated financial forecasts disclosure information. 2. General stock market investors react more slowly than institutional investors, who have significant abnormal trading volume during the first and positive updated mandated financial forecasts disclosure period. 3. General stock market investors react to a great extent than institutional investors to the absolute value of updates. 4. Securities dealers who are domestic local institutional investors and have their own analysts have smaller reactions than foreign investors and general stock market investors during the mandated financial forecasts disclosure period.
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自營商投資組合與財務預測關係間之研究

王玫淑 Unknown Date (has links)
本研究之主要目的乃在探討身為專業投資人之自營商是否會對財務預測修正資訊作出適切的反應?又其反應的時機為何?另外並進一步探討其投資策略的運用情形。財務預測修正資訊之公告代表公司之財務狀況或外在環境業已發生變動,身為三大法人之一的自營商是否會適切地反應此公告資訊?乃為本研究欲談討的第一項議題。而若自營商果真會對財務預測修正資訊之公告作出適切的反應,那麼在公司經營階層有延遲公告壞消息及提前公告好消息的動機下,自營商的反應時機是否會在向下修正公告日之前或向上修正公告日之後呢?此為本研究的第二項探討主題。此外,依據以往研究結果顯示:自營商之巨額交易資訊會引起股價異常變動;據此,本研究第三項欲探討主題即為,自營商是否會利用此資訊特性,以策略性的相反巨額交易行為來為自身謀求利益?或用以表達其本身對於公司經營前景有別於公司經營階層的獨特預期。 本研究之樣本期間自民國85年1月1日起至民國87年3月31日止,共27個月,總計樣本數為271個,觀察值2,439個。研究方法乃採市場模式,並運用 T 檢定來進行資料分析。經實證分析後,本研究所獲得的結論彙述如下: 一、自營商對於財務預測修正資訊之反應: 1.不論修正幾次,自營商均會對財務預測向下修正資訊作出適當的反應。 2.自營商在財務預測第一次向上修正之公告日前或後一週內會作出適當的反應;但對於第二次向上修正資訊反而會有相反的反應,不過統計上未達顯著水準。 二、自營商對於財務預測修正資訊之反應時機 1.自營商在財務預測向下修正公告日之前即予以適當反應;亦即有提前反應的現象。 2.自營商在財務預測向上修正公當日之前亦予以提前反應之(但在第二次向上修正情況,自營商之反應為相反反應。)。 三、自營商對於財務預測修正資訊是否存在有策略佳的相反巨額交易行為 在『巨額交易」定義為自營商買賣超張數占當週成交量的 40%以上時,除財務預測第一次向下修正情況外均存在有一個策略性的相反巨額交易樣本。而以另一個定義定義『巨額交易』--超過一個標準差以外者,則在各修正情況下皆可得到多個策略性的相反巨額交易樣本。 / This study aims at examination of whether professional investors--dealers would react appropriately to mandatory forecast revision, and of the timing of dealers' reaction; furthermore, at getting an understanding of investment strategies they've taken. Three main issues in this study: 1.The announcement of forecast revision indicates the external environment has been changed or the corporation's financial position has changed. Whether one of institutional investors--dealers would react appropriately to mandatory forecast revision? 2.The timingof dealers' reaction? According to previous research findings: Corporate managers tend to advance the announcement of good news and to delay the announcement of bad news. Thus, if dealers can react appropriately to mandatory forecast revision, could the timing of the dealers' reaction be prior to the announcement of unfavorable forecast revision or posterior to the announcement of favorable forecast revision? 3.Based on previous research fingds, the information of dealers' volume trading will cause abnormal volatility of stock prices. Does strategic reverse volume trading from which dealers might benefit exist in their reaction as a result? The samples cover 27 months from January of 1996 to March of 1998, and consist of 271 firms. The methodology imitates market model, and data is analyzed through T-test. The empirical findings can be summarized below: 1.Dealers' reaction to the announcement of forecast revision: (1)However many times the forecast revised, dealers will react appropriately to the announcement of unfavorable forecast revision within designed window. (2)Dealers will react accordingly to the first favorable forecast revision one week prior to or posterior to the announcement date, but do adversely to the second forecast revision. 2.The timing of dealers' reaction to the announcement of forecast revision: Dealers will react prior to the announcement date of forecast revision no matter it is favorable or unfavorable. (However in the second favorable revision situation, dealers' reaction is adverse to the forecast information.) 3.Whether strategic reverse volume trading exits in the dealers' reaction? (1)If "volume trading" is defined as dealers' trading excess accounts for 40% of weekly volume, only one strategic reverse volume trading sample exists in each of the situations except in the first unfavorable forecast revision situation. (2)If "volume trading" is defined as exceeding one standard deviation, several strategic reverse volume trading samples exit in each of the situations.

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