Apple's shares slid $6.18, 7.2 percent, to $79.15 in extended trading after Jobs announced his leave. That left the shares near their 52-week low, well off the high of $192.24 reached over the past year.

In this Sept. 9, 2008 file photo, Apple Inc. CEO Steve Jobs smiles after a product announcement in...

In this Sept. 9, 2008 file photo, Apple Inc. CEO Steve Jobs smiles after a product announcement in San Francisco. Jobs on Wednesday, Jan. 14, 2009 said he is taking a medical leave of absence until the end of June. Jobs told employees in an e-mail that his health issues are more complex than he thought. (AP Photo/Paul Sakuma, file)

(AP)
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AP Business Writer Andrew Vanacore in New York contributed to this report.
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