KEY POINTS
  • Silicon Valley start-up trading app Robinhood experienced an outage on Monday. 
  • Robinhood clients missed out on the biggest one-day point gain in the Dow Jones Industrial Average in history. 
  • "We are experiencing a system-wide outage. We are working to resolve this issue as soon as possible," the company said in a message to clients Monday. 

Robinhood, the free-trading pioneer favored by younger traders, said it experienced an outage Monday.

The technical problems took up most of the trading day and were not fixed before the close. Robinhood clients missed out on the biggest one-day point gain in the Dow Jones Industrial Average in history.