WHOLESALE INVESTOR
A wholesale investor is a term used to describe professional traders, such as market makers, arbitrageurs, hedge funds, or even large corporations.
They buy and sell large quantities of securities for their account. Thus, they are the volume buyers or sellers on the market.
RETAIL INVEATOR
A retail investor is a term used to describe individual investors and small firms that are relatively lower volume investors who are just starting their investment journey.
After a few months in the market, many retail traders want to become wholesale investors, depending on their goals and the leverage they command.