European stocks are seen opening on a sluggish note Tuesday as investors await key U.S. economic data for direction. Trading later in the day may be impacted by reaction to readings on U.S. retail sales, pending home sales, producer prices and consumer confidence.Ahead of Thanksgiving and Black Friday, these reports may provide valuable insights into inflation pressures, consumer spending patterns and overall economic sentiment in the world's largest . U.S. stock futures edged lower after major averages re ...