In the Harvard Business Review, William Lazonick, Mustafa Erdem Sakinç, and Matt Hopkins write:
Why have U.S. companies done these massive buybacks? With the majority of their compensation coming from stock options and stock awards, senior corporate executives have used open-market repurchases to manipulate their companies’ stock prices to their own benefit and that of others who are in the business of timing the buying and selling of publicly listed shares. Buybacks enrich these opportunistic share sellers — investment bankers and hedge-fund managers as well as senior corporate executives — at the expense of employees, as well as continuing shareholders.