please explain why, page-14

A DRP strategy could be a great way to screw out some money for a big player like a hedge fund. If you bought heaps before record date (say, 7 mill worth maybe) and had the DRP elected, then, on subsequent days of the DRP calculation you dumped a portion of these shares to force the price down, the new issued shares would be issued, as here, at a marked discount. Any loss would be offset by the dividend and issue price of the new shares.

All that now needs to happen is regression to the mean. A safer play then going long or short.