NorthWest Biotherapeutics Inc (NWBO)

[threefoot]

Regardless of who was the buyer or seller of the Oct. puts, the net effect is positive imho. Assuming the sp stays below $ on expiration:
1) The buyer puts the stock and nets $8. per share;
2) The seller now owns a lot of NWBO stock w/o having had to buy it on the retail market.Since the float of NWBO is small in relation to its outstanding shares, this a derivative way of trading large positions;
3) Since traders of puts know this, for the buyer the strategy is usually long term hold. while for the seller it is a way to liquidate a large position w/o having to face the illiquidity of the retail market.

So I think the net effect is positive for small traders because it removes pressure in both directions.