But many of the most active blue-collar investors are hardly newcomers.

Ben is an active investor in early-stage public and private companies.

Segel is an active investor in financial services and media assets.

Following his early death, Rose and her mother became active investors in Chicago's commercial development.

Clearly, active investors like these will help keep the pressure on chief executives and boards of directors.

At Fidelity, short selling is confined to fewer than 200 active investors.

Some active investors may be inspired to make quick trades in the stocks at issue.

The owners have been active investors for only about the last two decades.

Japan has been the most active investor in the manufacturing and consumer sectors.

Known among researchers as the "disposition effect," this behavior can cost an average active investor thousands of dollars a year.