Market reactions to the disclosure of internal control weaknesses and to the characteristics of those weaknesses under section 302 of the Sarbanes Oxley Act of 2002

We examine the stock price reaction to management’s disclosure of internal control weaknesses under §302 of the Sarbanes Oxley Act and to the characteristics of these weaknesses, controlling for other material announcements in the event window. We find that some characteristics of the weaknesses—their severity, management’s conclusion regarding the effectiveness of the controls, their auditability, and the vagueness of the disclosures—are informative. We also find that the information content of internal control weakness disclosures depends on the severity of the internal control weakness. Moreover, in a sub-sample uncontaminated by other announcements in the event window, we find negative price reactions to the disclosure of internal control weaknesses and material weaknesses.

限售股解禁的市场反应:机制与特征研究

限售股解禁的市场反应机制可概括为累积效应、提前反应和减持效应。实证研究证明了这三种机制的存在,同时还发现:累积效应是中国股市波动的重要原因之一;提前反应和减持效应均存在且显著为负;限售股解禁因素总体上引发了负向的市场反应;限售股解禁的心理冲击影响可能大于实际减持压力。大幅度提升市场投资需求以有效承接股票供给规模的巨量增加,这可能是缓解限售股解禁压力的重要思路。  

我国上市公司财务报告舞弊的经济后果——来自证监会与财政部处罚公告的市场反应

本文对沪深两市遭受中国证监会和财政部处罚的财务报告舞弊公司在公告日前后的市场反应及其影响因素进行了实证研究。研究发现上市公司舞弊持续时间与该公司的第一大股东的性质显著相关;在处罚宣告日前后各3天中,平均累计超额回报率(CAR值)达到-1.6%;通过对处罚原因分组t检验,发现投资者的反应并无差别。在对市场反应程度的线性回归中,只有舞弊持续时间变量与之有显著的负相关关系,而股权性质及舞弊种类变量均不显著。  

Market Overreaction to Product Recall Revisited—The Case of Firestone Tires and the Ford Explorer

We revisit the issue of market reaction to product recall and evaluate the magnitude of market reaction to the news of recall. We also examine how the competitors' stock prices are affected by the product recall. Specifically, we evaluate the stock price effects of events relating to the recall of Firestone tires by the Bridgestone Corporation, which were linked to the rollover accidents of the Ford Explorer SUVs. Our results indicate that the initial loss in the market value both for the Bridgestone Corporation and Ford Motor Company was far in excess of direct costs associated with recall. The market losses are approximately equal to the near worst-case estimates of direct and indirect costs, litigation costs, regulation compliance costs and costs associated with future losses in sales. The firms recovered their market value as more information on actual costs became available. These results suggest that the market initially overreacts negatively to the recall news and this reaction is generally based on all potential losses associated with recall. This reaction is corrected as information on actual costs becomes available. With regard to the competitors, our results show that the major competitors in the tire and auto industries experienced a significant gain in the market value of their stocks probably because their products were substitutes for the products affected by recall.  

Earnings Preannouncement Strategies

We examine the disclosure strategies managers follow when theyd preannounce quarterly earnings shortly before formal earnings announcements. We document that managers with bad news release essentially all of their news at the preannouncement date, while managers with good news only release about half of their news. Controlling for the combined news released at the preannouncement and earnings announcement dates, firms with negative earnings announcement surprises have significantly lower excess returns for the period from just before the preannouncement to just after the earnings announcement. This finding is consistent with the observed disclosure strategies whereby managers attempt to avoid negative earnings announcement surprises, and suggests that how information is presented can affect the market's reaction to that information.  

上市公司控制权转移市场反应的实证分析

2003年以来,中国上市公司的股权转让以及由此衍生的控制权转移现象日渐增多,中国上市公司的控制权市场也基本形成,为上市公司控制权转移市场反应的实证分析提供了便利条件。本文用事件研究法对2006～2010年我国上市公司控制权转移事件的市场反应进行实证研究。结果表明：市场对控制权转移事件的反应具有明显的＂先抑后扬再抑＂的倒N型特征,控制权转移信息存在提前泄漏问题。但是,随着市场的逐步完善,投机炒作现象有所减少。  

国有控股上市公司股权激励市场效应的实证分析

本文采集了21家国有控股上市公司实施股权激励首次披露日前后三十个交易日的股票收盘价，并对这些股价进行了统计分析。实证结果显示，国有控股上市公司股票价格在股权激励方案首次披露日之后给投资者带来了超额收益，国有控股上市公司实施股权激励给个股股价带来正面的市场效应，并且能够提高国有控股上市公司的短期融资能力。分析认为，广大证券投资者没有过分担心因国有控股上市公司实施股权激励可能带来的国有资产流失问题，多数投资者持积极认同态度。  

The Stock Market Reaction to Investment Announcements: The Case of Individual Capital Expenditure Projects

In this paper we provide novel evidence about the market reaction to capital expenditure announcements in the UK using a sample of nearly 500 disclosures made between 1989 and 1991. First, we show that the market reaction to joint venture announcements is significantly positive, whilst similar announcements from individual companies do not elicit any response. Second, we find that the market reaction to single company investments is positively related to the size of the expenditure, but only for projects which immediately generate cash. Finally, we report that the variability in the market response to announcements which follow large cash inflows is significantly lower than the variability in investors' reactions to announcements which are not preceded by such inflows.  

市场在关注审计师的职业声誉吗?——基于“科龙电器事件”的经验与启示

本文以我国资本市场上备受瞩目的科龙电器事件作为切入点,研究了我国的投资者是否关注审计师的职业声誉。研究结果显示,当审计师声誉受损时,市场会对其审计质量产生怀疑,并且通过股价机制体现出来。在本文研究的对德勤职业声誉造成严重影响的两个事件点,市场对经德勤和其他四大会计师事务所审计的上市公司都做出了负面的市场反应,且投资者对两者的反应程度并没有显著的差别。进一步的研究还发现,在声誉受损事件中,对于不同公司,投资者做出的负面市场反应并不相同,当公司存在盈余管理的可能性越犬,市场的负面反应也越强烈。