Here is a look at the ups and downs of GameStop#39;s recent fortunes. : Curated markets data, exclusive trading recommendations, Independent equity analysis & actionable investment ideas What a difference a week has made for video game retailer GameStop, which soared on Wall Street in January only to plummet some 70 percent since Monday. So is it game over for the stock market saga, which saw amateur investors challenge hedge funds with billions of dollars in assets?