Using three natural experiments, we test the hypothesis that investor overconfidence produces overpricing of high idiosyncratic volatility stocks in the presence of binding short-sale constraints. We study three events: IPO lockup expirations, option introductions, and the 2008 short-sale ban on financial firms. Consistent with our prediction, we show that when short-sale constraints are relaxed, event stocks with high idiosyncratic volatility tend to experience greater price reductions, as well as larger increases in trading volume and short interest, than those with low idiosyncratic volatility. These results hold when we benchmark event stocks with non-event stocks with comparable idiosyncratic volatility. Overall, our findings suggest that biased investor beliefs and binding short-sale constraints contribute to idiosyncratic volatility overpricing.

Purpose – Using a sample of 9,898 firm-year observations from 1,821 unique Chinese listed firms over the period from 2004 to 2019, this study aims to investigate whetherthe marketrewards meeting or beating analyst earnings expectations (MBE). Design/methodology/approach –The authors use an event study methodology to capture marketreactions to MBE. Findings – The authors document a stock return premium for beating analyst forecasts by a wide margin. However,there is no stock return premium forfirms that meet orjust beat analystforecasts, suggesting that the market is skeptical of earnings management by these firms. This market underreaction is more pronounced for firms with weak external monitoring. Further analysis shows that meeting or just beating analyst forecasts is indicative of superior future financial performance. The authors do not find firms using earnings management to meet or just beat analyst forecasts. Research limitations/implications – The authors provide evidence of market underreaction to meeting or just beating analyst forecasts, with the market’s over-skepticism of earnings management being a plausible mechanism for this phenomenon. Practical implications – The findings of this study are informative to researchers, market participants and regulators concerned about the impact of analysts and earnings management and interested in detecting and constraining managers’ earnings management. Originality/value – The authors provide new insights into how the market reacts to MBE by showing that the market appears to focus on using meeting or just beating analyst forecasts as an indicator of earnings management, while it does not detect managed MBE. Meeting or just beating analyst forecasts is commonly used as a proxy for earnings management in the literature. However, the findings suggest that it is a noisy proxy for earnings management.

We use the event study method to assess the impact of China's National Centralized Drug Procurement (NCDP) policy on the stock price of A-share listed companies in pharmaceutical industry. And the empirical evidence reveals that the policy has a negative effect on the share prices of firms won the bids in the past six centralized procurement. The stock prices of winning bidders were more negatively affected than those of non-winning bidders. If the winning bid price continues to be depressed, we cannot rule out the possibility of a collective abandonment of bidding by quality manufacturers.

Factoring financing is the most widely used form of supply chain finance, which has been adopted by more and more enterprises. The existing literature focuses on the motivation of suppliers to adopt factoring financing and the factors that affect the development of factoring. However, little attention is paid to the results of factoring. This study uses the event study method, draws on the Extended Resource based theory (ERBT), discussing how the factoring business announcement affects the stock market value of listed companies from the perspective of competitive advantage and the firm's own characteristics. By manually collecting 205 factoring business announcements from 115 Chinese listed companies from October 2019 to December 2022, we found that: (1) from the perspective of competitive advantage, the announcement of factoring business by non-Combination of Industry and Finance enterprises or their holding enterprises has more positive impact on the stock price of the enterprises. There is no obvious relationship between the size of factoring quota and stock price. (2) From the perspective of the enterprise's own characteristics, the announcement of factoring business by state-owned enterprises and small-scale enterprises can have a positive impact on the stock price of the enterprise. Before and after the Civil Code came into effect, there was no significant difference in the relationship between factoring business announcements and stock prices. This study uses secondary data to fill the gap in the study of the impact of factoring announcements on stock market value. This paper discusses the relationship between factoring business announcement and stock market value from the perspective of competitive advantage for the first time, providing theoretical guidance for managers to adopt factoring business under what circumstances. In addition, this study also provides documentation for the empirical study of factoring business announcements in China.

This paper studies how regulatory changes affect investors’ reactions at shareholder meetings in China. The objective of this paper is twofold: first, to analyse the information content transmitted to the shareholders of the largest Chinese companies listed on the China Securities Index 300 when an Annual General Meeting is held. A distinction is made between ordinary and extraordinary general meetings. Second, to find out if regulatory changes related to the Company Law of China and online voting in Annual General Meetings affect the information content of those meetings. The abnormal return obtained is examined through an event study using the Fama-French five-factor model. The results of our study indicate that the release of information and involvement of minority shareholders in general meetings during the research period led to higher return volatility and traded volume.

Blockchain mania occurs in response to the quick rise of Bitcoin price in markets with cryptocurrencies circulation. However, Chinese government policies regarding the development of blockchain are inconsistent--block access to the offerings and exchanges of cryptocurrencies such as Bitcoins, but raise the blockchain technology to a strategic position. We empirically investigate whether the government’s inconsistent policies will lead to blockchain mania and how it affects the blockchainrelated firms’ activities and performance. Our results are threefold: First, the supportive policy can fully offset the negative effect due to the national boycott of cryptocurrencies. Second, Nonspeculative firms experience a stronger and long-standing positive reaction, while the effect on Speculative firms is transient and vanishes after receiving a definitive warning ten days later. Third, the market reaction to government support appears more pronounced among firms having established blockchain technology alliances, or being endorsed officially.

During the past decade, Wechat-public-accounts (WPAs) have gained increasing popularity as a novel tool for voluntary disclosure among Chinese public firms. This paper examines whether WPA disclosures provide value-relevant information to the market. Using a topic model to process over 1.6 million WPA articles during 2012-2020 and an event study design, we find that the stock market reacts strongly following a WPA disclosure event and the magnitude varies with the topic and textual feature of the WPA articles. We further present evidence that firms use their WPAs to provide new information rather than reinforce information that is already presented in other channels. Moreover, financial analysts, journalists, and retail investors rely on corporate WPAs for their information production. Collectively, our findings indicate that corporate WPAs are an economically significant source of new information for market participants that supplement traditional disclosure channels considered in prior studies.

Employing an event study approach on the US-China trade conflict, we find that Chinese listed firms with institutional investor holdings exhibit smaller announcement loss than their counterparts. We also examine the heterogeneous effects of firms. Specifically, the positive effect of institutional investor holding is larger for firms with foreign exposure or in provinces with higher degree of marketization. Besides, institutional investor holding also reduces firms' financial cost of refinancing and improves their long-run performance given the same announcement loss. These findings help understand the role of institutional investor in achieving financial stability from the micro perspective.

We use China's recent anti-corruption campaign as a natural experiment to examine the (market expected) equilibrium consequences of (anti-)corruption. We argue that the announcement of inspections of provincial governments by the Central Commission for Discipline Inspection (CCDI) on May 17, 2013 represents a significant departure of past norms of anti-corruption campaigns, and thus serves a rare empirical opportunity to examine the equilibrium effects of anti-corruption campaigns for firms. We first present a conceptual framework to illustrate the channels through which anti-corruption actions can influence firms. Using an event study approach and May 17, 2013 as the event date, we find that, overall, the stock market responded positively to the announcement of strong anti-corruption actions. The announcement returns are significantly lower for luxury-goods producers, and SOES, large firms, or politically connected firms earn lower returns than private, small, or non-connected firms. We also find that existing local institutions play a crucial role in determining the announcement returns across firms. Moreover, a long-term difference-in-differences analysis shows that higher returns during the event window are associated with more subsequent entries of new firms and faster expansions of existing firms. Finally, we also provide direct evidence consistent with the endogenous grits effect.

Various studies have been done on wealth effects and financial performance of firms in different countries but have yielded mixed results. Data on completed deals of Cross-border Mergers and Acquisitions (CBMAs) comprising public listed firms with more than ten percent of share acquisition in five East Asian countries were analysed using event study and key financial ratios. Although the results for average abnormal returns in Indonesia and Korea were inconclusive, the results for Malaysia, Thailand and the Philippines suggest that the market had reacted positively adding value to the target firms at merger announcements. There was a significant improvement in targets’ free cash flow after CBMAs when compared to both before CBMAs and also control firms after CBMAs. The results also reveal that that these five East Asian countries have moved towards more efficient markets.