What happened: AMC Entertainment (AMC) stock jumped more than 20% on Monday. What's behind the move: The movie theater chain reported quarterly record revenue of of $1.6 billion along with an all-time high adjusted EBITDA, a measure of core operating earnings and cash-generating strength. Aron also pushed against "the prognosticators of doom who have continued to vastly underestimate the will and the skill of AMC" as the company navigated six years of challenges. The company has increased its market share, with domestic ticket revenues up by about 11.4%. Click here for in-depth analysis of the latest stock market news and events moving stock pricesRead the latest financial and business news from Yahoo Finance