shares of bone biologics corp bblg plummeted 519 toward a record low in premarket trading thursday after the developer of regenerative medicine for bones announced the pricing of its relatively large stock offering at a deep discount the company raised 5 million as it said overnight that it sold 254 million shares which represented 152 of the shares outstanding at price of 197 per share that price was 499 below wednesday’s closing price of 393 which was already a record low the stock has tumbled 465 over the past three months through wednesday while the sp 500 spx has gained 124