Coinspeaker Retailer Michaels (MIK) Stock Jumps Record 60% on JPMorgan UpgradeRetailer Michaels (MIK) experienced an almost 60% rise in its stock value following an upgrade by JPMorgan. This new positive outlook is impressive as the firm looks to bounce back from months of losses.Retailer Michaels (MIK) Stock Jumps Record 60% on JPMorgan Upgrade