A person or company that buys and sells stocks and shares for other people https://dictionary.cambridge.org/es/diccionario/ingles/stockbroker

Organized and regulated financial market where securities (bonds, notes,shares) are bought and sold at prices governed by the forces of demand and supply.(source: businessdictionary.com )

A designation applied to a specified type of security such as common stock or mutual fund units. Companies that have more than one class of

Certificate representing one unit of ownership in a corporation , mutual fund, or limited partnership. (source: http://www.investorwords.com/4525/share.html)

A market in which an investor purchases a security from another investor rather than the issuer, subsequent to the original issuance in the primary market.

The issue of a certificate entitling the holder to acquire shares in a company; frequently used in connection with bonus issues, such scrip has in