Definition of unit of trading

normal number of shares, bonds, or commodities constituting the minimum unit of trading on an exchange. For stocks, this is usually 100 shares. For corporate bonds on the New York Stock Exchange, the unit for exchange trading is $1,000 or $5,000 par value.

normal number of shares, bonds, or commodities comprising the minimum unit of trading on an exchange. For stocks, this is usually 100 shares, although inactive shares trade in 10-share units. For corporate bonds on the NYSE, the unit for exchange trading is $1,000 or $5,000 par value. Commodities futures units vary widely, according to the commodity involved.