Robinhood and other retail brokerages took steps to tamp down the speculative frenzy surrounding companies such as GameStop, but the actions only sparked more volatility in the market and an outcry from users of the platforms and some members of Congress who say small investors are being treated unfairly.
GameStop stock has rocketed from below $20 earlier this month to close around $350 Jan. 27 as a volunteer army of investors on social media challenged big institutions who had placed market bets that the stock would fall.
The action was even wilder on Thursday: The stock swung between $112 and $483 before closing down 43.2% at $197.44. It then shot back up 60% in after-market trading.