Check out which companies are making headlines after the bell Tuesday:
S&P cut its ratings on a handful of European banks including Credit Suisse, Barclays and Deutsche Bank to "A" from "A-plus." Meanwhile, the ratings agency affirmed its "A" rating on UBS.
Yahoo - The Internet company announced it acquired Qwiki, an automated video production company. The announcement follows a report from tech news website AllThingsD that Yahoo was in advanced discussions to purchase Qwiki for $50 million. Shares edged lower in extended-hours trading.
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