"The potential pain to come can be seen in the cost of borrowing shares of its competitor, Lyft Inc. With more than 80% of Lyft’s lendable stock out on loan, the cost to borrow shares for new shorts hovers near 35% on an annualized basis, IHS Markit data show. That compares to somewhere between 1% and 2% for Uber, though its free float is about 5.5 times larger, which accounts for part of the difference. The borrow cost for Apple Inc. and Alphabet Inc. is about 0.25% to 0.5%."