Bloomberg

Tech earnings preview: giants post growth while threats loom

Foto: Imaginechina via AP

Apple, Alphabet, Microsoft, Amazon and Facebook -- the biggest players in technology and the five largest U.S. companies by market cap -- are all projected to post double-digit revenue growth for the December quarter when they report earnings this week, reflecting strength in their main businesses of selling gadgets, cloud computing, digital advertising and online retailing.

But with the stocks already at or near records, looming over some of these top players are questions that, if the answers don't please investors, could send them tumbling -- and may take the broader market lower along with them. The tech sector accounts for more than a fifth of the S&P 500, meaning that swings in the stocks could have a significant impact on markets as a whole...

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