Wharton Professor Jeremy Siegel on what could be driving the tech-fueled sell-off

Tech led the markets lower last week. Now investors need to know whether Apple and other FAANG names can continue their outsize role in pushing stocks higher. Jeremy Siegel, finance professor at the University of Pennsylvania's Wharton School, joins "Squawk Box" to discuss.
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Tue, Sep 8 20209:27 AM EDT