GameStop stock records biggest 1-day loss, erases $27 bn in market value

US video game retailer GameStop's rally came to an end this week as the shares recorded their biggest one-day loss, erasing over $27 billion in market value from their high. The stock, whose rally was driven by users of Reddit's WallStreetBets, closed below $100 for the first time in a week. GameStop has given up over 80% of its gains.