Take a look at some of Tuesday's midday movers:
Home builder D.R. Horton shares rose to a 52-week high after posting its strongest quarter in six years.
Netflix stock is higher after announcing plans to raise $400 million through a senior notes offering.
Hess shares also traded up to its 52-week high on very heavy volume as activist investor fund Elliot Management named potential nominees to the Hess board. The energy company announced plans to exit its storage and refining businesses this week and focus on exploration and production.
Danaher rose to its historic high after posting fourth-quarter earnings that rose 10.5 percent on improved sales. The medical equipment maker lowered its 2013 earnings guidance to between $3.32 and $3.47 per share from earlier guidance of $3.40 to $3.55 per share.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Lori Spechler
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Greece may prove to be a temporary influence but it's likely to again dominate trading, as traders watch the fallout in oil and elsewhere.
Check out the companies making headlines after the bell Monday: A Schulman, Advanced Micro & more.
Oil's free fall could continue, with U.S. crude futures breaking $50 in the near future.
Concerns about global growth collide with record production and the potential for more supply from Iran.
Patti Domm is CNBC Executive Editor, News, responsible for news coverage of the markets and economy.
A CNBC reporter since 1990, Bob Pisani covers Wall Street from the floor of the New York Stock Exchange.
Senior Producer at CNBC's Breaking News Desk.
Dominic Chu is a markets reporter for CNBC.
Evelyn Cheng is a markets writer for CNBC.
Sara Eisen is a correspondent for CNBC, focusing on currencies and the global consumer.