© Reuters/BRENDAN MCDERMIDThe Robinhood App is displayed on a screen
By Nate Raymond
BOSTON (Reuters) - Online brokerage Robinhood on Thursday sued to invalidate Massachusetts' recently-adopted fiduciary rule and block state regulators from proceeding with charges it encourages inexperienced investors to place risky trades without limits.
Robinhood in a lawsuit filed in state court in Boston said the fiduciary standard of conduct for broker-dealers that Massachusetts Secretary of State Bill Galvin's office adopted last year violates state and federal law.
A spokeswoman for Galvin did not respond to a request for comment.
Galvin, the state's top securities regulator, in December filed an administrative case accusing Robinhood of using aggressive tactics to attract inexperienced investors and failing to prevent outages on its platform.
He accused the app-based service of using strategies that treated trading like a game to lure young, inexperienced customers, including having confetti rain down for each trade made on its app.
The case is the first enforcement action brought under a state fiduciary rule adopted in September that raised the investment-advice standard for brokers.
Regulators are seeking a fine and order requiring Robinhood to engage a compliance consultant to review its platform and policies. Robinhood has denied wrongdoing.
(Reporting by Nate Raymond in Boston; Editing by Chris Reese and Nick Macfie)