The Robinhood application is displayed in the App Store on an Apple Inc. iPhone in an arranged photograph taken in Washington, D.C., U.S., on Friday, Dec. 14, 2018. The Securities Investor Protection Corp. said a new checking account from Robinhood Financial LLC raises red flags and that the deposited funds may not be eligible for protection. Photographer: Andrew Harrer/Bloomberg
Online brokerages such as Robinhood have seen a surge in inexperienced day traders opening accounts since the stock market crash in March. Bloomberg

Cyber criminals leave some Robinhood users with looted accounts