Jeremy Siegel on the high-flying technology stock rout: 'I would be very careful right now'

A Beat The Virus sign is displayed at the Nasdaq MarketSite in the Times Square neighborhood of New York, U.S., on Wednesday, July 8, 2020.
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University of Pennsylvania's Wharton School finance professor Jeremy Siegel warned technology investors about the high-flying names plunging right now. 

"If you're in the S&P, I wouldn't worry, but if you have all your assets in those high flyers I would be very careful right now," Siegel said on CNBC's "Squawk Box" on Tuesday.