Riding highConfidence is soaring, but are we over the 'Wall of Worry' By Shawn Langlois, CBS.MarketWatch.com Last Update: 7:28 PM ET Nov. 7, 2003 SAN FRANCISCO (CBS.MW) - U.S. investors suddenly seem to be seized by an unbearable lightness of being. Judging from soaring investor-confidence levels, they've chosen to ignore the types of concerns that a year ago fed grave fear -- and sent the U.S. stock market to its post-2000 low. Wall Street is plumbing new depths of corruption with the mutual fund scandals. Polls show President Bush possibly losing re-election. U.S. soldiers are being killed on a daily...