PDL tumbles; Trubion rallies on buyout offer By: MarketWatch August 13, 2010 at 10:26 AM EDT Shares of PDL Biopharma drop on news that Roche might discontinue certain royalty payments to the company. Read More >> Related Stocks: Emergent Biosolutions Macy's Pdl Biopharma Inc Roche Holding AG Basel American Depositary Shares