When you short sell in Intraday (sell first, buy back later the same day), the position has to be bought back before the market closes. If it can't be — most often because the stock is stuck at its upper circuit with no sellers to buy from — you're left having sold shares you don't own and can't deliver. This is a short delivery, and the exchange settles it through an auction. Here's what that means for you and your account.
Why can't the position always be squared off?
An Intraday short is closed by buying the shares back. If the stock has hit its upper price limit (upper circuit), there may be no sellers at that price, so the buy-back order can't be filled — not by you, and not by the system's end-of-day auto square-off. The sell obligation then goes to settlement without matching shares to deliver.
What is an auction?
Because you couldn't deliver the shares you sold, the exchange steps in and buys them on your behalf through a separate auction market, then delivers them to the buyer who was due to receive them. You don't choose the price or the timing — the exchange runs the process and settles it to your account. For the full step-by-step mechanism, see how the auction process works when there's a short delivery.
What does an auction cost me?
A short delivery can cost significantly more than the original trade:
- The shares are bought at the auction price, which can be higher than the price you sold at (a stock at its upper circuit keeps rising), and you pay the difference.
- An auction penalty and related charges also apply, as set by the exchange and regulations.
So the total cost is the auction purchase price plus the penalty — which is why an unclosed short position is best avoided.
What will I experience, step by step?
Here's what actually happens to your trade and your account:
- On the day of the trade — your short couldn't be bought back before the close, so the position isn't squared off. Because a short can't be carried forward for delivery, it goes to settlement as a short delivery. You don't need to place any further order — there's simply nothing available to buy it back at.
- The next trading day — the exchange holds the auction to source the shares for the buyer you sold to. You don't place any order or do anything here; it's handled in settlement on your behalf.
- On settlement — your account is debited the cost: the auction price (or the close-out price if the auction couldn't source the shares) plus the penalty and charges. This reduces your available balance.
- What you'll see — the debit is reflected in your funds / ledger balance, and the breakdown appears in your contract note / statement for that settlement.
Because the amount charged can be well above the price you sold at, your actual loss on the trade can be larger than it looked when the market closed.
How do I avoid a short delivery?
- Square off your short Intraday position yourself, well before the close — don't rely on the end-of-day auto square-off for a short, especially in a fast-moving stock.
- Be cautious short selling stocks that can hit the upper circuit (low-liquidity or momentum names), where a buy-back may not be possible.
- Remember short selling is only allowed as an Intraday trade — you can't carry a short position forward to deliver later.