Cinemark Holdings (CNK) shares rallied 6.5% in the last trading session to close at $20.75. This move can be attributable to notable volume with a higher number of shares being traded than in a typical session. This compares to the stock's 9% gain over the past four weeks. Shares of Cinemark jumped, after an analyst at Roth MKM upgraded the company’s rating. Optimism is fueled by anticipated improvements in box office performance driven by a strong lineup of blockbuster releases and the company's strategic ...