quoted from http://shortlogic.tumblr.com/post/5834390772/right-now-our-d...:

"Right now our desk is seeing something they’ve never seen before. It currently costs roughly 100% annualized to short LNKD. So put in monthly terms, if you borrowed $20,000 of LNKD to short, each month you would have to pay an 8.3% borrowing charge (100% / 12 months = 8.3%) or $1667 per month. That is absolutely unreal.

Of course this charge amount can change, and it probably would decline if/when LNKD becomes easier to borrow. But right now is virtually impossible to borrow, so the charge is off the charts."