Summary
This article provides a detailed explanation of the trading unit (lot): its concept, calculation method, impact on trading strategies, and illustrative examples for both individual and institutional investors.
Detailed explanation of the concept/definition
A trading unit (Lot) is the minimum volume of securities allowed to be traded according to the exchange's regulations. On many exchanges, the lot unit for stocks is 100 shares (one lot = 100 shares), however, there may be different regulations for special stocks or negotiated transactions.
Operation and related regulations
Exchange regulations: The exchange sets minimum lot sizes, rules for odd lot trading, and order matching methods for odd lots (which may be through separate sessions or negotiated matching).
Odd trades: Some exchanges allow odd trades, but with certain conditions or within specific timeframes; fees and execution costs may be higher.
Impact on automated order placement: The trading platform needs to support specifying lot sizes or accept odd quantities if the platform allows it.
Application/Impact on investors
The trading unit affects capital strategy: if the minimum lot size is large (e.g., 100 shares) and the stock price is high, the capital needed to open a position will be larger. Retail investors need to consider allocating capital appropriately or using supporting products such as ETFs to diversify with smaller capital.
For example: If the price of XYZ stock is 50,000 VND/share, a lot of 100 shares requires 5,000,000 VND in capital (excluding fees).
Notes, risks, and practical tips.
Always check the lot size regulations for each stock before placing an order.
With limited capital, consider buying ETFs or gradually accumulating to reach the minimum lot size.
Please note that transaction fees for odd lots may not be commensurate with the transaction value.
FAQ
Q1: How many shares are in one lot?
A1: Typically, a lot consists of 100 shares in Vietnam, but each stock code needs to be checked as there are exceptions.
Q2: Can I buy a few individual shares?
A2: Some platforms/brokers allow odd-numbered transactions, but may have time restrictions or higher fees; check with your broker beforehand.
Q3: How does lot size affect the even-numbered purchase (DCA) strategy?
A3: Lot-based trading requires investors to accumulate sufficient capital or buy cyclically to reach a minimum quantity; ETFs can help with DCA with smaller amounts of money.