Buybacks are under attack as a short-term stock price manipulation scheme, allowing insiders to cash out at inflated stock prices. This manipulation hypothesis predicts that, as a result of buybacks, companies will underinvest, undermining long-term performance and shareholder value. Recent research tests this hypothesis using an international sample that contains approximately 10,000 buyback announcements made by U.S. firms and 10,000 made by non-U.S. firms in 30 other countries. These buyback announcements occurred between 1998 and 2010.
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