the case that there aren't the shares available to short. I called my broker earlier (RJT...sub of Mutual of Omaha) and he told me even if they have the shares, it's at the brokers discretion if they want to lend them out. When I asked why, he told me "it could be a number of reasons", then hinted that it's a bloated pig and they may not want to lend any.
By the way, still cannot find any big boys buying. Wonder why?