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TraderGash

05/01/13 3:51 PM

#172 RE: dussfan #171

You can only sell short if your broker has identified a source where they could borrow the shares from. When your trade settles three days after the trade (t+3), if your broker no longer has a source to borrow the shares from, your position will automatically be closed, sometimes without warning. At ST this happens a lot, I am told. It happens much less often at Interactive Brokers, as they have a powerful algorithm that manages short positions on a first-in last-out basis.