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Tech company earnings reports reveal a rising risk for any business reliant on advertising revenue

Microsoft CEO Satya Nadella speaks at Microsoft Developer Day in Singapore on May 27, 2016.
Charles Pertwee | Bloomberg | Getty Images

Microsoft is no stranger to supply chain challenges in its hardware business, but it's now warning for the first time about their impact on an unlikely area: advertising. The company became the latest to warn that big customers could restrain their advertising spending as they deal with supply chain hiccups.

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