Glossary · PSX Mechanics
Odd Lot
Any quantity of shares that is less than a standard board lot, typically fewer than 100 shares. Odd lots may sometimes attract a wider spread or be harder to execute at the best available price.
01—What is Odd Lot?
The definition — and what it means in practice.
An odd lot is any quantity of shares smaller than the standard board lot used for trading, typically fewer than 100 shares. Because many traders quote and think in board lots, odd-lot orders can sometimes be less liquid and may not match instantly at the best displayed prices. This can result in a wider bid–ask spread or partial fills, especially in less actively traded stocks.
Odd lots matter because they can change your real trading cost and execution. If you place a small order, you may end up paying closer to the ask (when buying) or receiving closer to the bid (when selling), particularly when the order book is thin. Odd lots also commonly arise from corporate actions (for example, bonus shares) or from portfolio rebalancing, where you need to tidy up residual holdings.
If the board lot is 100 shares, then buying 40 shares is an odd lot, and it may fill at a slightly worse price than a 100-share order.
- Odd lot means fewer shares than the standard board lot (typically under 100 shares).
- Smaller sizes can face weaker liquidity and a wider spread than board-lot trades.
- Execution may be slower, partially filled, or not at the best displayed price in thin order books.
- Odd lots often come from corporate actions or fine-tuning portfolio sizes.
02—How odd lot works on the PSX
The Pakistan-specific rules, conventions, and numbers.
On the Pakistan Stock Exchange (PSX), a standard board lot is typically 100 shares, so many orders are naturally placed in multiples of 100. Any order below that size is an odd lot. In practice, you will encounter odd lots when you place small-value orders, when you want to adjust a position precisely, or when your holding ends up with a remainder that is not a clean multiple of 100.
Odd-lot orders still settle like other cash-market equity trades, with clearing through the National Clearing Company of Pakistan Limited (NCCPL) and electronic holding at the Central Depository Company (CDC). Settlement is T+1 (one business day), so even small odd-lot trades create the same settlement obligation. Because execution quality depends on liquidity, using order types thoughtfully can matter more for odd lots in less active shares.
03—Common misconceptions
Where investors most often get this wrong.
Odd lots are not allowed on the PSX.
Odd lots can be traded; they are simply quantities below the standard board lot. The main issue is execution quality, not permissibility.
An odd lot always gets a worse price.
Not always. In highly liquid shares, an odd lot may execute near the best bid or ask. The risk of a wider spread is higher when the order book is thin.
Odd lots are only for beginners with small budgets.
Odd lots also occur for experienced investors when rebalancing, trimming positions, or dealing with leftover shares after corporate actions.
04—Using odd lot on BSL
Where this term shows up across the platform — with live data.
- Check trading sizes and place smaller orders in your watchlist on Stocks.
- Use a Stock Screener to focus on more liquid shares where odd-lot execution may be smoother.
- Track market activity and volumes before placing small orders via Market.
- Learn board-lot conventions alongside odd lots in the glossary entry for Board Lot.
05—Frequently asked questions
What investors ask about odd lot on the PSX.
Frequently Asked Questions
An odd lot is a share quantity smaller than the standard board lot. On the PSX, a board lot is typically 100 shares, so any order under 100 shares is an odd lot.
They can be. Smaller orders may face less liquidity and sometimes a wider bid–ask spread, particularly in less actively traded shares, which can affect the price you get.
No. Odd-lot equity trades still clear through NCCPL, are held electronically at CDC, and settle on T+1 (one business day), just like other cash-market trades.
Odd lots can arise when you adjust a position by a small amount, or when corporate actions leave you with a holding that is not an exact multiple of the board lot.
Not always. The spread depends mainly on liquidity and the depth of the order book. Odd lots are more likely to experience poorer pricing when the share is thinly traded.
06—Related terms
Keep building the picture.
A standardised number of shares set for trading transactions on the PSX. In most cases, a board lot is 100 shares, though this can vary depending on the security's price level.
A real-time electronic record of all buy and sell orders for a security on the exchange, showing prices and quantities at each level.
The highest price a buyer is willing to pay for a security. The gap between the bid and ask price is the spread and represents the cost of trading.
The lowest price a seller is willing to accept for a security. Also called the offer price. The difference between the ask and the bid price is called the spread.
The difference between the bid price and the ask price of a security. A narrow spread indicates high liquidity; a wide spread suggests lower liquidity and higher trading costs.
The ease with which a security can be bought or sold without significantly affecting its price. High-liquidity stocks have large trading volumes and narrow bid-ask spreads.
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