The buyers of those PUTs are AF's followers. They suppose that ANCHOR will fail to gain AdCom's endorsement in August, and will fail to gain approval in December. However, the AdCom meeting about Vascepa has not been scheduled yet ("August" was AF's assuming). BTW, yesterday's AdCom meeting about Avandia showed that Dr. Nissen was in the minority champ (they are still frozen under the Vioox shadow).
Honest Question - How can you tell when a put is sold bullish or if they were bought because buyer thinks stock will fall? I have never been able to figure this out by looking at the option trades. Someone has to buy for every sell.