中國新上市公司（Initial Public Offerings，以下簡稱IPO）上市後經營績效大幅衰退之現象時有所聞，IPO績效變化不僅影響投資者的利益，也攸關轉型經濟過程中，中國證券市場能否有效引導社會資源的配置。本研究調查2001年至2005年間，在中國深圳以及上海交易所A股市場IPO公司經營績效變化以及可能原因，延伸討論保薦制度及政治關聯對前述現象的影響。首先測試樣本公司上市前後經營績效之差異，並調整同業平均數。實證結果指出，上市後兩年ROA及ROE(無論是否調整產業因素)皆不如上市前兩年，杜邦分析發現獲利能力衰退是造成財務績效衰退的主因。
保薦制度於2004年2月1日正式施行，藉由提升保薦人及保薦機構的執業水準，以建立市場約束機制。本研究依保薦制度實施及政治關聯分別分組，採用分群組T檢定與Wilcoxon做差異分析。實證結果顯示保薦制度下IPO公司上市前的各項財務績效較佳，顯示其能篩選體質較好公司上市；而上市後績效衰退的情形也較為趨緩，中介機構制衡機制有所發揮。政治關聯度低的低國有股公司在上市前的各項財務績效指標較高國有股公司好，推論政治關聯可能影響上市機會，使其上市前需極大化自身績效；相對而言，上市後較難維持績效。
進一步分析績效衰退原因，本研究比較各期間IPO公司各項應計數變化。實證結果顯示。整體而言上市後總應計、流動應計數、營業相關應計數以IPO當年呈倒V型，有上市後反轉的現象，並與經營活動現金流量變動呈反向變動，推論與盈餘操縱有關；保薦制度的在應計數反轉現象沒有顯著抑止效果，而政治關聯度低的IPO公司亦沒有顯著操縱應計數的現象以極大化上市前經營績效。最後，代理問題探討中結果顯示，董監持股變動以及大股東持股變動與績效衰退顯著相關，符合利益一致假說。 / The article investigates whether there is a significant change in financial performance of firms after they went to public for the period between 2001 and 2005 in China A –share market. First, we use ROA and ROE as main performance index. The results indicate a significant decline in ROA and ROE. Following Du Pont framework, return on sales is the most important reason about the decline. Second, we find under new Sponsor’s System, IPO firms had better perfomanace before they went public and they suffered less declined after IPO. We also find the low political connection firms maximize financial performance before they went public to win the IPO opportunity, and they hardly maintain operating performance. At last, we examine the reason for financial performance decline. We compared the change between accruals and operating cashflow the period of IPO for inspecting wether earnings management existed. The empirical results indicate IPO firms maximize accruls when IPO.This study also indicates a significant correlation between post-IPO performance and agency problem.
| Identifer | oai:union.ndltd.org:CHENGCHI/G0095353006 |
| Creators | 游曜如 |
| Publisher | 國立政治大學 |
| Source Sets | National Chengchi University Libraries |
| Language | 中文 |
| Detected Language | English |
| Type | text |
| Rights | Copyright © nccu library on behalf of the copyright holders |
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