Looking for Top-Tier Bonds? Investors Have Fewer Choices By: CNBC.com News August 10, 2011 at 09:57 AM EDT With long-term U.S. debt being knocked out of the elite triple-A credit club, investors' top-tier fixed income choices have dwindled yet again. Read More >> Related Stocks: Automatic Data Processing Exxon Mobil General Electric Johnson & Johnson Microsoft Pfizer W.W Grainger