Round Lot Definition Calculation and Uses

1633 reads · Last updated: January 12, 2026

A round lot is a standard number of securities to be traded on an exchange. In stocks, a round lot is considered 100 shares or a larger number that can be evenly divided by 100. In bonds, a round lot is usually $100,000 worth.A round lot is sometimes referred to as a normal trading unit, and may be contrasted with an odd lot.

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