Though GameStop shares have been jumping in recent days, analysts and experts say they're doing so because of quirks in the market and not because of actual increased value for the struggling video game retailer. The same is true for the movie theater chain AMC, which had warned it was near bankruptcy late last year. 1, after the company tapped shareholder and Chewy co-founder Ryan Cohen to spearhead a new committee to help the video game retail chain's transition to e-commerce. The stock was...