Oracle's earnings report flashes warning sign for tech sector as equity investments take a hit

A safety sign is posted in front of Oracle headquarters on December 09, 2021 in Redwood Shores, California.
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Oracle's earnings report Thursday showed the database software company's business is holding up OK despite global unrest and challenges in the economy. Revenue was in line with estimates, and the forecast was roughly what analysts were expecting.

But for investors focused on the tech sector, there was a particularly ominous number in the report.