OneChicago: There is almost NO market in many of the hard to borrow names (ie RIOT, OSTK) that you have listed. No market in the futures and no market in the spread market (STARS). I have owned many hard to borrow names and I can get the "lending fee" easier and get a better price by buying the equity option "synthetic" at a discount. The option markets are much better than what you guys post. Also, IB's 50% is also much better although this is a "daily" rate so it is harder to compare vs locking in a rate over a term For the record, I would rather use SSF's (vs Options) as there is no assignment risk but there just isn't a good market in many names.