The NASDAQ-100 is widely followed as a measure mainly of the big tech and social media stocks that make up the index.

How bad is the pain among technology shares Monday? Well, the futures tied to the tech-heavy Nasdaq 100 were down 4.5% before ...

It's often the case that U.S. traders treat an overnight sell-off in stock-index futures as an opportunity rather than a warning. So the next few hours, as the East coast wakes, up will be instructive ...

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