The designated time periods during which a financial exchange is open and trades can be executed. Trading hours vary by asset class and exchange — for example, the NYSE operates 9:30 AM to 4:00 PM ET on weekdays, while the forex market trades 24 hours on weekdays and crypto markets operate 24/7.
Example
“A day trader focused exclusively on NYSE trading hours from 9:30 AM to 4:00 PM ET, avoiding the higher-spread pre-market and after-hours sessions.”