Takes place after the official close of business on the trading floor of a stock exchange. No set length of time is allocated for after hours dealing, particularly with the advent of electronic screen trading.

On the London Stock Exchange, dealings done after the MQP. Such dealings are treated as dealings done on the following business day. In general, trading after the hours a stock market has closed. (For all major US stock markets, after-hours trading is 16:00-18:30 Eastern Standard Time). After-hours trading often takes place after the release of news that could make the price of a stock rise or fall sharply after the close of trading. Participation in the after-hours market is strictly voluntary and may offer less liquidity and inferior prices.

Dealing done at the end of the mandatory quote period. These are treated as dealings done on the following business day.