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On the day the stock market gained $1.1 trillion, Robinhood went down for 17 hours

Robinhood, the free stock-trading app, crashed on the worst day possible.
Robinhood, the free stock-trading app, crashed on the worst day possible. (Robinhood)

Robinhood, the free stock-trading app, crashed on the worst day possible.

Stocks rallied Monday with the Dow logging its biggest point gain in history. The S&P 500 gained $1.1 trillion Monday. But an all-day system-wide outage left Robinhood customers seething.

An "issue with a part of our infrastructure" caused the 17-hour disruption on Monday, the company said in a statement. Robinhood said overnight that the issue was fixed, but the service went down again Tuesday morning shortly after trading began.

Around noon Tuesday, Robinhood said the earlier outage had been resolved.

Robinhood, which has about 10 million users, told customers in an email that the funds in their accounts are safe and personal information was not breached. Despite those reassurances, people slammed the app on Twitter. Some called the outage "ridiculous" and other demanded compensation.

In response, Robinhood is compensating some affected customers with billing credits. It's also giving premium members three months worth of service for free. The premium tier costs $5 a month.

The outage is another black eye for Robinhood, which caters to young people and is valued at nearly $9 billion. FINRA, Wall Street's self-regulator, recently fined Robinhood $1.25 million for sending customer trading orders to four broker-dealers without guaranteeing the best price.

Robinhood’s existence has helped revolutionize the stodgy trading industry. It has forced established players to abolish commissions and even sparked the blockbuster merger of Charles Schwab and TD Ameritrade.