GameStop shares plunge after Robinhood, TD and other brokerages move to limit trading

The strange saga of GameStop took a new twist on Thursday, as trading brokerage Robinhood put restrictions on trading in the company's shares, a move that drew the ire of the app's merry band of stock-swapping Redditors.

The trading app Robinhood has exploded in popularity this year by offering free trading, fuelling a boom in retail investor activity.

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