Finance Watch: Opko's Stock Halted As Nasdaq Awaits An Explanation For SEC Pump-And-Dump Lawsuit

Public Company Edition: An SEC complaint alleges that the company, Opko CEO Frost and co-defendants bought penny stocks, pumped up their value, then dumped shares for sizeable profits. Also, Pfizer and Retrophin float debt offerings, while Zealand sells royalties and milestone fees to raise cash.