Dade Hayes Finance EditorShares in AMC Entertainment jumped 9% Monday to close at $6.46, their highest level since late February, the point when COVID-19 started to decimate the global movie theater business.The leading exhibitor’s stock, which had plunged below $2 in April on mounting fears of bankruptcy, peaked at $6.84 during the trading day Monday. Its closing price was the highest since it hit $6.51 on February 25.Shares in No.