I just went over the shortable list for Canadian stocks available through IB. The list has expanded considerably from about 6 weeks ago when I last printed off the list. Why has the list expanded so considerably (not that I'm complaining, it was the one thing I didn't like about IB was their small short list)? Another question I have is why are some Canadian stocks 'unavailable' for trading. For example, if I want to buy FCE.UN, I cannot through IB. I have been told that the stock is unavailable for trading but no explanation is given. Why is that? Oddly, I just checked and the stock is on the available short list yet I can't buy it.