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Round Lot


A Round Lot in finance refers to a standard number of units of a particular asset – typically stocks or bonds – that is traded on an exchange. For many securities, the round lot is 100 units; however, it can vary depending on the asset and exchange. Trading in round lots can facilitate more efficient trading and better pricing compared to trading in odd lots which are less than the standard round lot.


The phonetics of the keyword “Round Lot” is: /raʊnd lɒt/

Key Takeaways

1. Definition: A round lot refers to a standardized number of units of a particular asset, such as securities, bonds, futures, or other financial instruments, which are traded on an exchange. Commonly, a round lot has 100 units of shares, although this figure could be different based on the specific exchange or product being traded.

2. Purpose: Round lot sizes are established to streamline the trading process by setting a standard, easy-to-work-with size for transactions. This provision minimizes complications and fractional calculations during trading operations. Round lots are also considered as one of the basic units of trading measurement in investment planning and portfolio management.

3. Impact on Market: For individual investors, orders which deal in round lots may receive more favorable treatment from brokers and trading platforms as compared to odd lots, or those in quantities outside these standardized numbers. This fact can impact liquidity, pricing, and trade execution in the market.


The business/finance term “Round Lot” is significant because it refers to the standard number of units in a trading instrument (like stocks, bonds, or futures contracts) that are typically bought or sold in financial or commodity markets. These standard quantities, usually established by the exchange, enhance trading efficiency and liquidity by encouraging uniformity and simplicity in transactions. Moreover, securities often have more favorable commission or trading fees when transacted in round lots compared to smaller, irregular lot sizes, also known as odd lots. Therefore, understanding the concept of round lots becomes crucial for investors to optimize trading strategies and costs.


The purpose and utility of a round lot in financial markets is primarily to streamline and make trading more efficient. Round lots, typically of 100 shares, are generally the standard trading unit on exchanges, and they are easier, faster, and less costly to trade as they attract more liquidity. Additionally, the retail investors, brokers and institutions dealing with such round lots are deemed to be more credible in the market. Stocks bought in round lots are believed to be poised for long-term capital growth instead of short-term trading profits.Furthermore, round lots simplify the process of setting bids and orders. As financial instruments, especially equities, are usually bought in multiples of 100, it makes computations easier, leading to quicker execution of trade orders. Additionally, orders placed in round lots are more likely to get filled because they are more attractive to market makers. Essentially, round lots contribute to the smooth functioning of financial markets by enhancing liquidity, simplifying computations, and hastening the order execution process.


1. Stock Trading: In the stock market, a round lot is often considered as 100 shares. For instance, if an investor decides to buy 500 shares of stock in XYZ Corporation, they are buying 5 round lots of that particular stock. 2. Bond Investing: In the bond market, a round lot may be much larger, usually $100,000 or $1,000,000 in bonds. For example, if an investor buys $100,000 in US Treasury bonds, they have purchased one round lot.3. Currency Trading: In the forex market, a standard round lot is typically 100,000 units of the base currency. So, if a trader buys 100,000 US dollars against the Euro, that’s considered a round lot. However, forex trading platforms also offer trading in mini lots and micro lots, which are smaller than standard lots.

Frequently Asked Questions(FAQ)

What is a Round Lot?

A round lot is a standard number of units generally used for trading securities. In stock markets, this typically means 100 shares.

Why is the concept of a Round Lot important in finance?

Round lots are standardised units on which the public securities exchanges operate. It makes trade easier, facilitates order processing, and maintains an orderly market.

Do I always have to trade in Round Lots?

Not necessarily. Many modern electronic trading systems allow you to trade in odd lots (less than 100 shares) or mixed lots, but the trades might not be as quick or efficient.

Is there any risk associated with trading Round Lots?

The risk is similar to any other form of stock trading. The price of the stock could go up or down. There’s no specific round lot trading risk.

How does the Round Lot concept apply to other securities like bonds?

The round lot for other securities may be different. For instance, in bond markets, a round lot is generally $100,000 or $1,000,000 face value.

Why are smaller lots referred to as ‘Odd Lots’?

Smaller lots are termed ‘Odd Lots’ because they are atypical, i.e., they are not a round number of shares and are typically smaller than the standard round lot.

Can Odd Lots be traded just like Round Lots?

Yes, odd lots can be traded, but they are typically more expensive due to higher broker fees and may take longer to sell since they are often given lower priority in trading.

What happens when a trader wants to buy more than 100 shares?

Orders larger than 100 shares are typically traded in additional round lots. For example, if a trader wants to buy 500 shares, that would be traded as five round lots.

Are Round Lots and Board Lots the same?

While both refer to a standard number of units, the terminology varies by market. ‘Board Lot’ is commonly used in Canadian and Asian markets, whereas ‘Round Lot’ is more common in the U.S.

: Is trading in Round Lots quicker than trading in Odd Lots?

Generally, round lots are traded more quickly as they are a standard trading unit and, thus, have more demand in the market than odd lots.

Related Finance Terms

  • Odd Lot: A parcel of securities that is less than the normal unit of trading for those particular securities.
  • Block Trade: A high volume transaction in a financial instrument, usually conducted off the regular trading exchange.
  • Blue Chip Stocks: Stocks of large, well-established and financially stable companies with a history of reliable performance.
  • Market Order: An order given by an investor to buy or sell a security at the best available price in the current market.
  • Limit Order: An order to buy or sell a security at a specific price or better; it guarantees the price but not the execution.

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