Use Options For a Chance To Buy KERX at a 56% Discount By: Market News Video June 24, 2014 at 11:43 AM EDT Looking back to 153 days ago, Keryx Biopharmaceuticals Inc. (KERX) priced a 6,900,000 share secondary stock offering at $14.50 per share.. Read More >> Related Stocks: Keryx Biopharm Inc