Come this afternoon, the market will once again turn its attention to the fortunes of the world's most profitable technology company. There's little doubt Apple's quarterly earnings for the quarter ended December 31 will include some eye-popping numbers. But beyond the headlines – revenue, profit, iPhones and iPads sold – there are four areas of concern that will largely determine how investors react to Apple's latest numbers.
Apple's gross margins
SOURCE: Company filings
The Icahn Effect
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