3 Sep 2019 Pre-market trading, in contrast, occurs in the hours before the market officially opens. Together, after-hours and pre-market trading is known as Robinhood starts trading at 9:00 am, EST. Besides buying and selling stocks and ETF’s during regular market hours, which are during the week from 9:30 am until 4:00 pm, EST, Robinhood clients can also trade during extended hours. Robinhood’s pre-market session begins half an hour before the regular market opens. We’re giving you more time to trade the stocks you love. Traditionally, the markets are open from 9:30 AM EST - 4 PM EST during normal business days. With extended-hours trading, you’ll be able to trade during pre-market and after-hours sessions. Pre-Market opens 30 minutes earlier, starting at 9:00 AM EST