US Airways Group Inc (Nasdaq:LCC), MGIC Inventory Corp (Nasdaq:MTG), Americal Axel Holdings (Nasdaq:AXL) and Intermune Inc (Nasdaq:ITMN)are among the most actively traded companies in Monday’s trading among companies with market capitalizations under $1 billion.

Also included among the results: : Liz Claiborne (Nasdaq:LIZ), National Penn Bancshares (Nasdaq:NPBC), LDK Solar Inc (Nasdaq:LDK), STEC Inc (Nasdaq:STEC) and PDL Bio Pharmaceuticals Inc (Nasdaq:PDLI).