Employees of the new American Airlines Group Inc. will celebrate the closing of the merger between AMR Corp. and US Airways on Monday by ringing the bell to open the Nasdaq market. The ceremonial bell ringing will take place remotely from Hangar 2 at Dallas/Fort Worth International Airport. The new company will trade on the Nasdaq Global Select Market under the ticker symbols AAL and AALCP. Company officials are expected to complete the deal later in the day at a law office in Dallas, where merger documents will be executed. The merger, which survived legal challenges over the weekend, is the culmination of a process that began when Fort Worth-based AMR Corp. filed for Chapter 11 bankrtuptcy in November 2011.The new airline will be the largest in the world and will continue to be headquartered in Fort Worth.