Restrictions on trading app users may be playing a part as GameStop and other targeted stocks find a reverse gear.

It was the first company to benefit from a surge in interest, co-ordinated by users of a forum on REDDIT, that culminated in shares nearing $500 each last month from a lowly $20.

AMC Entertainment, which is another of the stocks to have benefited from the unprecedented activity of the past fortnight, was also 40% down at one stage on Tuesday.

BlackBerry and Bed Bath & Beyond also showed double-digit declines.