AMC may sell up to 11.6 million of its shares with a trading phenomenon pushing stock in the movie theater chain up almost 3,000% this year, and 140% just this week. AMC is emerging from pandemic lockdowns that threatened the existence of the company and industry analysts have yet to fully explain the extreme volatility that is being driven by large numbers of online traders that seem to have disregarded the rough path the company faces in its recovery. AMC acknowledged that phenomenon Thursday in a filing with the U.S. Securities and Exchange Commission when it announced the potential sale of shares “from time to time.”