Basically i was fooling around with C today and noticed that when you go te sell it its basically impossible to short. You can sell it if you own it it would appear but not if you want to short it naked. So my question is this. Is this an Interacive Brokers thing or is this stock impossible to short? If I were at an arcade or porp type deal then is it it shortable? When I enter a naked short order even if theres shares on the bid at my price I cant execute on them. This seems very odd indeed and makes me wonder how many other shares are like this one. Is anybody out there able to short Citigroup? If so how is it done?...