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The Dow and S&P 500 finished higher Tuesday, but gains were limited as further losses for Apple weighed on the tech sector and as investors hesitated to jump in ahead of some major earnings reports in the coming days.
Check out which companies are making headlines after the bell Tuesday:
Facebook CEO Mark Zuckerberg just unveiled "Graph Search," which enables users to search people, places, interests and photos, reports CNBC's Julia Boorstin. Lou Kerner, Social Internet Fund and Ben Parr, CNET, share their opinions on the non-web search.
Facebook's "Graph Search" allows users to search for people, places, photos and interests, reports CNBC's Julia Boorstin. John Abell, Reuters MediaFile columnist and Jordan Rohan, Stifel Nicolaus, provide perspective.
CNBC's Scott Wapner reports Facebook has announced a partnership with Microsoft. David Kirkpatrick, author of "The Facebook Effect," weighs in.
Facebook shares are selling off on its "graph search" announcement, with David Fitzpatrick, author of "The Facebook Effect, and the CNBC's "Power Lunch" crew.
Facebook's big announcement was ... a social search feature that will allow users to search their friends' content.
CNBC's "Power Lunch" crew discusses Facebook's closed social search, and what it means for the stock.
Facebook volume surges as the company announces its new social search, with David Kirkpatrick, author of "The Facebook Effect."
Scott Wapner has the breaking news on a highly-awaited announcement from Facebook. (2:17)
Facebook's Mark Zuckerberg unveiled the social media giant's next big idea -- social search. Would he ever work with Google? Here's what he had to say.
David Kirkpatrick, author of "The Facebook Effect," says Facebook could be announcing something to do with mobile or search.
Expect Facebook's mystery announcement to disappoint, venture capitalist Porter Bibb says.
Expect an "underwhelming announcement" from Facebook, Porter Bibb of Media Tech Capital Partners says.
In just under an hour, Facebook will unveil what it's been "building," reports CNBC's Julia Boorstin; and its stock is up nearly 60 percent over the past 3 months, with Porter Bibb, Media Tech Capital Partners.
Dennis Berman, Wall Street Journal, provides a look at what Facebook could possibly be up to now.
Facebook's mystery announcement on Tuesday may not live up to its advance billing, one analyst told CNBC on Tuesday.
CNBC's Julia Boorstin reports CEO Mark Zuckerberg is expected to take the stage at Facebook's mystery event. Also, a look at closet indexing and Facebook, with CNBC's Gary Kaminsky.
It will be less painful, and less embarrassing, for Dell to sell off its pieces while it is private, but the fact that the stock price is down and financing is cheap is not a sufficient reason to go private.
U.S. stock index futures edged lower Tuesday as investors worried over the ongoing debate in Washington over raising the debt ceiling and ahead of what is expected to be a lackluster earnings season.