open interest Jan 15 puts with strike of $20

[jft310]

Tom most likely these were sold puts , that investor collected a premium for that short sale . If the stock is above the strike $20 the seller gets to keep the money . The Wells Fargo fund manager likes to sell puts on Interoil. Most likely they thought that was a safe trade , They expected the stock at expiration to be above $20. The off setting put buyer to the seller of the puts would have been the market maker . The market maker will be the loser on the trade .