Unveiling Stock Trading Rules: How Many Shares Are in One Lot? The Big Reveal of Trading Units in US, Hong Kong, and Taiwan Stocks

Why do some people spend less while buying stocks, and others spend more?

In major global stock markets, investors often observe an interesting phenomenon: purchasing the same company’s stock in different markets can require vastly different amounts of capital. The root of this difference is not the intrinsic value of the stock itself, but the completely different trading units regulated in each market.

Although US, Hong Kong, and Taiwan stocks are all stock investments, their definitions of “minimum purchase units” vary. Understanding this is key to truly grasping the investment logic of global stock markets.

What is stock price? How to understand the stock pricing mechanism?

Stock price refers to the real-time trading price of a stock in the market, reflecting the amount of money buyers and sellers are willing to pay.

In trading systems, stock prices are quoted per share. As the buying and selling forces fluctuate, the transaction price of the stock also varies continuously. This price is jointly determined by supply and demand, company performance, market expectations, and other factors.

It is important to note that stocks in different countries use different currencies for valuation: US stocks are priced in USD, Taiwan stocks in NTD, and Hong Kong stocks in HKD.

Deep dive into “one share”: the smallest trading unit of stocks

Definition and valuation method of one share

A listed company is essentially a corporation with shares, representing ownership in the company. To raise funds, the company divides some ownership into multiple equal shares for transfer. Here, “one share” is the minimum unit recognized by the trading market.

When investors want to know “how much is one share,” they look at the current transaction price in the market. For example:

• Tesla (TSLA) in the US, with a stock price of $101.81 per share on January 6, 2023, rose to $254.11 per share by August 2, a gain of over 150% in less than 7 months.
• Taiwan Stock TSMC (1101.TW), with a quote of 32.10 NTD per share as of April 30, 2024.

Difference between stock face value and market price

Many people easily confuse the concepts of “face value” and “market price.” Face value is the nominal value set when the company issues stocks, used to record the original capital contribution of shareholders, and usually does not change. Market price, on the other hand, is determined by supply and demand, company performance, investment expectations, and fluctuates constantly.

For investors, the key is to look at the current market price, not the face value. A stock with a face value of 10 yuan may have a market price of several hundred yuan or just a few yuan.

Comparison of trading units in major global markets: how many shares in one lot?

Different stock markets have significant differences in their regulations on trading units. This also explains why the initial capital required for investing in different markets varies greatly:

The special nature of “one lot” in Taiwan

In the Taiwan stock market, “one lot” equals 1000 shares as a clear regulation. This means that even if you are interested in a particular stock, you must buy at least 1000 shares. Compared to the flexibility of buying just 1 or a few dozen shares in the US market, this raises the investment threshold in Taiwan.

The flexible mechanism of “one lot” in Hong Kong

Hong Kong’s trading unit “lot” is more complex. Depending on the stock price, each lot may represent 100, 500, 1000, or 2000 shares. The higher the stock price, the fewer shares per lot. This design aims to keep transaction amounts within a relatively reasonable range.

Investment insights: cost differences across markets

From the above comparison, US stock investment has the lowest entry barrier. Investors can participate in high-quality companies with relatively less capital.

In contrast, Taiwan and Hong Kong stocks, due to their trading unit regulations, require larger single investments. This also means investors need to be more cautious in selecting targets and managing risks. For investors with limited funds, this indeed presents a certain challenge.

Understanding these basic rules is crucial for global asset allocation and risk management. Choosing markets that match your capital size and risk tolerance is the first step toward becoming a mature investor.