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We find abnormal volatility spreads in the options market immediately before corporate insider stock trades, suggesting informed options trading prior to insider trades. The informed options trading is more pronounced for large insider trades, firms in more corrupt areas, and insider purchases in firms with high information asymmetry. Furthermore, the abnormal volatility spreads are positively associated...
This study is the first examination of daily stock options trading prior to corporate share repurchase announcements. Using a sample of over 2,000 share repurchase announcements in the United States during the 1996–2012 period, I find that the average volatility spreads become abnormally high immediately prior to repurchase announcements. Furthermore, the pre-announcement abnormal volatility spreads...
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