Securities Lending

Securities lending is the plumbing that makes covered short selling possible. Long-term holders with no intention of selling — superannuation funds, index managers, sovereign wealth funds, insurers and the custodians acting for them — make their holdings available to borrowers in exchange for a fee. The borrower posts collateral, usually cash but sometimes government bonds or other high-quality securities, typically worth more than the loaned stock so the lender is protected against a default.

Legal title passes to the borrower for the life of the loan, which is what allows the borrower to sell the shares on market. The lender retains the economic exposure: any dividend paid during the loan is passed back as a manufactured dividend, and the lender continues to bear the price risk as though it still held the stock. Voting rights, however, travel with title, which is why lenders routinely recall stock ahead of contentious annual general meetings.

Most Australian lending runs through agent lenders and prime brokers under a Global Master Securities Lending Agreement, the industry-standard documentation. Loans are usually open-ended rather than term, meaning either side can end them at any time. The lender can recall the shares, forcing the borrower to return stock it has already sold, and the borrower can return them whenever the short is closed.

The supply side sets the price of shorting. Where a stock is widely held by lenders and lightly borrowed, fees are trivial and the stock is easy-to-borrow. Where lendable supply is thin — a small free float, a concentrated register, holders who decline to lend — fees rise, the stock becomes hard-to-borrow, and utilisation climbs toward the point where recalls become likely.

Australian lending data is not public. Utilisation, borrow fees and loan balances are commercial information held by prime brokers and specialist data vendors, unlike the net short positions ASIC publishes. Short interest is therefore the visible half of the picture: it shows how much stock has been borrowed and sold, but not how expensive or precarious those borrows have become.