A round lot (or board lot) is a normal unit of trading of a security, which is usually 100 shares of stock in US. Each stock exchange has its own regulations regarding round lot sizes: they can range anywhere from 1-100 shares, depending on the exchange. Any quantity less than this normal unit is referred to as an odd lot.


This article uses material from the Wikipedia article Round lot, which is released under the Creative Commons Attribution-Share-Alike License 3.0.