Free stock-trading pioneer Robinhood experienced another major outage Monday, keeping clients on the sidelines during another historic day for stocks.

"Trading is currently down on Robinhood and we're investigating the issue," the Silicon Valley start-up said Monday shortly after the opening bell. "We are experiencing issues with equities, options and crypto trading. We are working to resolve this issue as soon as possible."

Around 10:30 a.m. Robinhood tweeted that the platform was partially restored and only the fractional trades service was down. However, twitter members continued to post photos of errors from their Robinhood apps.

The outage coincided with a dismal day for stocks on Monday. The major averages cratered as investors braced for the economic fallout from the coronavirus and a shocking all-out oil price war. The Dow Jones Industrial Average tanked 2,000 points, while the S&P 500 plunged 7.6%. The Nasdaq Composite fell 7.3%.