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Full-Text Articles in Business
Are Corporate Spin-Offs Prone To Insider Trading?, Patrick Augustin, Menachem Brenner, Jianfeng Hu, Marti Subrahmanyam
Are Corporate Spin-Offs Prone To Insider Trading?, Patrick Augustin, Menachem Brenner, Jianfeng Hu, Marti Subrahmanyam
Research Collection Lee Kong Chian School Of Business
Despite abundant empirical evidence of informed trading ahead of major corporate events, no such evidence has been reported in the case of corporate spinoff (SP) announcements. This is surprising, as SP announcements are unexpected, and are also associated with a positive price jump in the parent company’s stock. Using a sample of 280 US announcement events from 1996 to 2013, we document significant pre-announcement informed trading activity in options for about 9 to 16% of events in our sample. In contrast, we find statistically insignificant evidence of informed trading in stocks, suggesting that informed traders employ leverage through options. In …
Option Listing And Information Asymmetry, Jianfeng Hu
Option Listing And Information Asymmetry, Jianfeng Hu
Research Collection Lee Kong Chian School Of Business
Option listing increases informed and uninformed trading by 12.4% and 23.9%, respectively, in the US between 2001 and 2010, hence reducing relative information risk. We establish the causal effects using control stocks with similar propensities of listing and a quasi-natural experiment using option listing standards. The benefits are more prominent for stocks with active options trading and opaque stocks. The reduction of information risk is larger for good news than bad news, and the stock price response to earnings surprise weakens after listing. The results suggest that options improve the overall market information environment beyond substitutional effects to stock trading.
Do Poison Pills Increase Firm Risk?, Thomas Turk, Jeremy C. Goh, Candace Ybarra
Do Poison Pills Increase Firm Risk?, Thomas Turk, Jeremy C. Goh, Candace Ybarra
Research Collection Lee Kong Chian School Of Business
Management scholars have argued that an active takeover market discourages risk-taking by managers and that takeover defenses serve to counter the risk-reducing pressures of an active takeover market. This study employs the Black and Scholes Option Pricing Model to determine whether or not adoption of poison pill securities increases investor perceptions of firm risk. The results provide evidence that the Option-Implied Standard Deviations of common stock returns increase significantly on the poison pill adoption date, on average. Furthermore, the implied standard deviations remained significantly above pre-adoption levels for several days after the poison pill adoption, suggesting that the perceived increase …