Are stock borrow fees charged on weekends?

When purchasing or selling a security or other financial instrument there are two key dates involved with the transaction.  The first is the Trade Date which represents the date on which the order was executed and the second, the Settlement Date, or the date at which payment is made and the shares are transferred. The Settlement Date can vary by product type and country of listing.  For example, U.S. stocks, bonds, securities options, mutual funds, futures and futures options all settle 1 business day after Trade Date…

Unless you arrange for a pre-borrow, you will not be subject to stock borrow fees if you open and close the short position within the same trading session. When a short stock position is initiated, a locate is performed so as to make a reasonable determination the shares are available to borrow, however, the actual borrow does not take place until settlement (T+1 for U.S. stocks). If an account closes the short position on the same day opened, the sale and purchase will net and settle on the same settlement date, with no borrowing of shares required…

When you sell stock short, unless you arrange for a pre-borrow, the actual borrow does not take place, nor are borrowing costs incurred, until the trade settles. Similarly, when you close out the position, the borrow is not returned, and therefore any borrow costs remain, until settlement date. Settlement date is generally 2 business days after the trade date, which can result in fees being charged over a weekend or holiday…

ENROLL IN PRE-BORROW PROGRAM

IBKR offers eligible customers with Portfolio Margin accounts at IBLLC and IBUK and approved “Pre-Borrow” Trading Permissions the ability to borrow U.S. shares in advance of selling such shares short as a "pre borrow" transaction…