“You’re basically looking at stocks that have had some version of either sharp uptrends or parabolic moves, moving even higher. That’s a sign of speculation,” Steve Sosnick, chief strategist at Interactive Brokers, told Barron’s. “Anytime you see parabolic moves or linear vertical moves, that’s telling you that it’s less about a sober assessment of a company’s prospects on a straight valuation basis than it is about people chasing momentum.”
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