Stock Lending and Borrowing (SLB) is an exchange-run mechanism where you can temporarily lend shares lying idle in your demat account to someone who needs them, and earn a lending fee for it. The borrower must return the same shares later, and the whole arrangement is collateralised and guaranteed through the exchange's clearing system. You never depend on the borrower's word.
How does lending my shares work?
Think of it as renting out a flat you own but aren't using. Harpreet holds 500 shares of Kaveri Motors (a fictional company) that she plans to keep for years. Through SLB she lends them for a fixed tenure. What happens:
- Her shares move out of her demat to the borrower, via the exchange's SLB platform.
- She earns a lending fee, set by supply and demand in the SLB order book, quoted per share, like a price.
- The borrower deposits collateral with the clearing corporation, which stands guarantee in the middle. If the borrower fails to return the shares, the clearing corporation makes Harpreet whole using that collateral.
- At the end of the tenure (or on early recall/return, where the rules allow), she gets the same quantity of the same shares back.
During the loan she is not the registered shareholder, so corporate-action handling follows the SLB rules: transactions are typically adjusted or foreclosed around events like dividends, bonuses, and splits so that the lender is compensated for what she would have received. The exact treatment per event type is defined by the exchanges.
Who borrows shares, and why?
The classic borrower is a short seller. Someone who wants to sell a stock they don't own, expecting to buy it back cheaper. In the cash market you can only short sell intraday; to stay short overnight in a stock, a trader needs to actually deliver shares, and SLB is the legitimate way to source them. Other borrowers include arbitrageurs (see what is arbitrage?) covering one leg of a strategy, and traders avoiding settlement shortfalls.
| Party | What they give | What they get |
|---|---|---|
| Lender | Shares, for a fixed tenure | Lending fee + shares back |
| Borrower | Fee + collateral | Temporary use of the shares |
| Clearing corporation | Guarantee in the middle | Collateral held against default |
What does it pay, and what does it cost?
There is no fixed rate. The fee is discovered on the SLB platform, series by series, in-demand stocks (heavily shorted, or near a corporate action) can fetch a meaningful annualised return, while most large liquid names fetch very little. Only stocks the exchange has made eligible for SLB can be lent, tenures run up to exchange-set maximums (contracts are typically month-wise), and minimum quantities apply. Taxation of lending fees has its own treatment, worth checking with a tax professional.
Things to keep in mind
- SLB income is a way to sweat idle long-term holdings, but fees on most stocks are modest. Demand is concentrated in a few in-demand names.
- Your shares are guaranteed by the clearing corporation's collateral mechanism, not by the borrower. That is the safety backbone of SLB.
- Eligible stocks, tenures, minimum lot sizes, and corporate-action treatment are all set by the exchanges and revised periodically; check the current rules before lending.
- You typically can't sell shares while they are out on loan (unless you recall them per the platform's rules), so lend only what you genuinely won't need in a hurry.