Shares in GameStop dropped below $100 (£73) for the first time in a week on Tuesday, as small investors started to sell-off shares in the company - but billionaire investor Mark Cuban encouraged people to hold on. On Tuesday morning, trading was temporarily suspended when shares in GameStop appeared down at 40 per cent (or roughly $114 per share). And at one point, GameStop shares dropped by 60 per cent on the previous day's trading, at around $90 per share - the lowest since last week.