rented coaching stock
Sumo term for a wrestler who is temporarily promoted to a higher rank by borrowing the stock (kabu) of another wrestler, usually to fill a vacancy in the banzuke.
stock borrowing
Finance term for borrowing shares, typically for short selling or other trading strategies.
He became a sekitori through rented coaching stock.
A wrestler with rented stock loses the position when the original stockholder retires.
The cost of stock borrowing is rising.
To short sell, you first need to borrow shares.