The Swede I largely agree but I only partly agree. What has made it possible for the sellers of collateral shares to do this is the absence of good news and the resultant declining pps. If the opposite had been the case the sellers of collateral shares would have had to buy them back at higher prices and therefore lost money. Once there is important good news the trend of the pps may be reversed and it will no longer be profitable to sell these shares and to buy them back a little later.