ARTICLE: What triggered the sell-off that knocked $10 billion off Apple's market cap?

Its all-time high of $360 a share, started to drop at about 1 p.m. Then, at 1:39, it collapsed, falling from $355 to $349 in the space of four minutes.  In all, $10 billion got shaved off Apple's market capitalization before the stock began to recover.
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