Money GameStop stock plummets 60%, shedding two-thirds of its value in two days after meteoric rise February 2, 2021 Jessica Menton, USA TODAY Comments Off on GameStop stock plummets 60%, shedding two-thirds of its value in two days after meteoric rise GameStop tumbled 60% Tuesday in its latest bout of extreme volatility, with shares shedding two-thirds of their value in two days.