Genworth Financial - The mortgage insurer and others including MGIC Investment and Radian Group fell after the Federal Housing Finance Agency proposed tightened requirements for private insurers that do business with Fannie Mae and Freddie Mac.
Gilead Sciences - The drug developer edged lower after two members of the Senate Finance Committee asked it to defend the $80,000 cost of its Sovaldi treatment for hepatitis C.
New York Times - The newspaper publisher declined after Jefferies reduced its second-quarter and third-quarter advertising estimates for the company.
Nordion - The health-science company gained after saying it had cleared regulatory hurdles and would be acquired by privately held Sterigenics.
Shire - The biopharmaceutical company jumped on a Bloomberg News report that it was in talks to be acquired by AbbVie.
URS - The builder of bridges and power stations rose after Reuters reported the company had hired Citigroup and DBO Partners to explore a potential sale.
Wells Fargo - The country's largest mortgage lender declined after reporting revenue fell 1 percent in its second quarter.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Rich Fisherman.
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