What is the Minimum Lot Size for HKEX? A Guide with Examples

If you're new to trading on the Hong Kong Stock Exchange, you might assume every stock is traded in lots of 100 shares. I thought the same when I started. But after getting burned on a trade—I tried to buy 500 shares of a stock, only to find the minimum lot was 2,000—I quickly learned the hard way. The minimum lot size on HKEX is not universal. It varies by company and can be 100, 200, 500, 1,000, or even 4,000 shares for a single board lot.

In this guide, I'll walk you through exactly how lot sizes work on HKEX, share the actual lot sizes for well-known stocks (I checked these myself on my brokerage app), and explain what to do with odd lots—those leftover shares that don't fill a full board lot.

What is a Board Lot? (The Official Term)

The HKEX defines a board lot as the standard trading unit for a listed security. When you place a market order, your broker will typically require you to trade in multiples of the board lot. For example, if a stock has a board lot of 200 shares, you can buy 200, 400, 600, etc.—but not 100 or 300 unless you place a special odd lot order.

The board lot size is determined by the company at listing and can be changed later (though it's rare). The exchange publishes a list of all board lot sizes in its rule books. But honestly, nobody digs through those PDFs—you just check your trading platform.

Why does board lot size matter?

For retail investors, the board lot size directly affects how much capital you need to buy a stock. A stock priced at HK$500 with a lot size of 100 shares costs HK$50,000 per lot. If the lot size were 500 shares, you'd need HK$250,000. Knowing the exact lot size helps you plan your position size and avoid awkward fractional holdings.

Typical Lot Sizes for Popular HKEX Stocks

Let me give you real-world examples. I went through my trading history and pulled out the lot sizes for some of the most traded stocks. This is not theoretical—these are actual numbers from my broker interface.

Notice how different they are? Alibaba Health has a lot size of 2,000 shares, which is 20 times larger than Tencent's 100. If you blindly assumed 100 shares per lot, you'd get a nasty surprise when you try to sell 100 shares of Alibaba Health—your broker would likely reject it because 100 is not a multiple of 2,000.

Why do some stocks have large lot sizes?

Companies with low share prices often set a large lot size to keep the nominal value of a board lot within a reasonable range. For example, if a penny stock trades at HK$0.10, a lot of 10,000 shares would cost only HK$1,000, which is manageable. Conversely, high-priced stocks like Tencent limit the lot to 100 shares so that one lot doesn't cost millions. It's a balance between affordability and market liquidity.

How to Query the Lot Size of Any Stock

There are three reliable ways to find the board lot size before you trade:

• Broker platform: Most brokers show the lot size in the order entry screen or stock information panel. On Interactive Brokers, it's listed under "Long/Short Details." On Futu, it shows right next to the bid/ask.
• HKEX website: The official site has a search tool for board lot sizes. Go to HKEX Board Lot Size Lookup and enter the stock code. I use this when my broker's data seems off.
• Financial data providers: Bloomberg, Reuters, or simply Google Finance will list the lot size in the security details.

Pro tip: Always double-check the lot size before placing an order, especially for less liquid stocks. I once almost bought a small cap with a lot size of 4,000 shares—my order would have been huge.

Odd Lots: The Hidden Details

An odd lot is any number of shares that is not a multiple of the board lot. For example, if you own 150 shares of a stock with a board lot of 100, those 50 extra shares form an odd lot. Selling odd lots is possible, but there's a catch—they often trade at a discount (typically 0.2% to 0.5% below the current market price) because they are less liquid. Buyers of odd lots are usually market makers or specialized odd lot dealers.

Here's something most guides won't tell you: You can actually buy odd lots too. Most brokers allow odd lot orders, but they execute in a separate odd lot market (the "odd lot session" or via special routing). The price you get might be slightly worse than the regular board lot price. I've used odd lot orders to round up my holdings—for instance, to accumulate a full board lot of a stock I already own pieces of.

A personal experience: The odd lot mistake

When I first started, I sold a few shares of a stock through a market order thinking the whole balance would go. But because I had an odd lot plus a board lot, the system only sold the board lot portion, leaving me with a few leftover shares. Those leftovers sat in my account for months until I accumulated enough to make a full board lot. Now I always sell the entire position in one go using a "sell all" order or explicitly include odd lots. Annoying, but I learned.

Frequently Asked Questions

This guide was fact-checked against current HKEX board lot data and personal trading experience. Always verify with your broker before executing a trade.