These are trading positions that were not closed by the end of the trading day and held overnight. For securities trading, overnight positions expose the investor to risk because a number of events can negatively impact a position while the trading floor is closed.

A broker-dealer's position in a security at the end of a trading day.

A situation where a day trader chooses to keep a position open at the end of the trading session.

Having an overnight position means that you have trading positions that have not been closed by the end of that trading day.

A broker-dealer's position in a security at the end of a trading day.