US Stocks Decline On Greece Concerns; S&P Falls To Two-Month Low

Global worries about heightened political turmoil in Greece sent the Standard & Poor's 500-stock index to a two-month low Tuesday as investors shrugged off a rise in U.S. small-business confidence.

The worries over Greece overshadowed the National Federation of Independent Business's small-business optimism index,which rose two points to 94.5 in April, boosted by strength in the net revenues and new jobs subindexes. The index'sreading was the highest seen since December 2007.

Dun & Bradstreet skidded 15% as the commercial information company said core revenue will be flat to up 0.3%, downfrom its before estimate for 3% to 5% growth, and said it will cease operating a China-based business in other words underinvestigation.

Rackspace Hosting tumbled 9.9% afterwards the data-storage provider's first-quarter results raised concerns about apotential slowdown in its cloud computing business.