They can demand the stock back consistent with the terms of the borrow. A footnote in the article made it sound like it was typically a day-by-day thing. They d

They can demand the stock back consistent with the terms of the borrow. A footnote in the article made it sound like it was typically a day-by-day thing. They don't instantly get the stock back, presumably you need to go and buy it on the open market and then return it to them or pay some sort of fine/interest.