(NASDAQ: AAPL) is worth just over $3 trillion as of this writing, and it's routinely among the most valuable companies in the world. Much of that success is owed to its world-class brand and customer loyalty, intangible assets that have helped Apple become one of the most profitable companies in the world too.

But the business isn't foolproof, and its revenue has declined in each of the past four quarters. Even the stock's gains have been lackluster of late with shares rising just 1% in the past six months. Investors appear to be growing concerned about the stock, especially given its elevated valuation.

There is, however, a bright spot for the business: its services segment.

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Source Fool.com